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Tytuł:
Effect of hot deformation and isothermal holding temperature on retained austenite characteristics in 3-5% Mn multiphase steels
Autorzy:
Opiela, Marek
Grajcar, Adam
Pakieła, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/2204525.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hot deformation
bainitic transformation
retained austenite
Mn effect
multiphase structure
manganese effect
austenit szczątkowy
struktura wielofazowa
efekt Mn
odkształacanie wysokotemperaturowe
przemiana bainityczna
Opis:
The paper presents stress-strain characteristics recorded during the four-step compression of axisymmetric samples in the Gleeble thermomechanical simulator. The hot deformability of three steels with Mn concentrations of 3%, 4% and 5% was compared. The analysis of the influence of plastic deformation and Mn content on the microstructure of alloys, and in particular, on a fraction and morphological features of the retained austenite, was performed. The proportion of the retained austenite was determined by the X-ray diffraction method. It was found that the content of Mn in the range from 3% to 5% does not have a significant impact on the high-temperature resistance of the steel during compression tests, but it has a significant influence on the microstructure of the steel and the fraction of retained austenite. The optimal conditions for maximizing the proportion of retained austenite were obtained at the temperature of 400 °C, and it decreased with increasing Mn concentration in the steel. It has been shown that it is related to the redistribution of carbon from the remaining austenite fraction with an increase in the manganese content. The mechanical properties were determined on the basis of hardness measurements.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 2; art. no. e144611
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electroplastic Effect of High Manganese Austenitic Steel
Autorzy:
Zimniak, Z.
Dobras, D.
Powiązania:
https://bibliotekanauki.pl/articles/353766.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electroplastic effect
high manganese steel
TWIP effect
Opis:
The article presents the results of the investigations performed on high manganese austenitic steel which underwent the test of uniaxial tension, with the application of electric current impulses. The application of low voltage impulse alternating current of high intensity during the plastic deformation of the examined steel caused the occurrence of the electroplastic effect, which changed the shape of the stress-strain curve. A drop of flow stress and elongation of the tested material was observed in the case of the application of electric current impulses, in respect of the material stretched without such impulses and stretched at an elevated temperature. The analysis of the morphology of the fractures showed differences between the samples tested under the particular conditions. An analysis of the alloy’s microstructure was also performed under different conditions. The application of electric current impulses can have a significant influence on the reduction of the forces in the plastic forming processes for this type of steel.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 1; 431-436
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cast High-Manganese Steel – the Effect of Microstructure on Abrasive Wear Behaviour in Miller Test
Autorzy:
Kalandyk, B.
Tęcza, G.
Zapała, R.
Sobula, S.
Powiązania:
https://bibliotekanauki.pl/articles/383241.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
austenite
high-manganese steel
microstructure
abrasive wear resistance
Miller slurry machine test
austenit
stal wysokomanganowa
mikrostruktura
odporność na ścieranie
test Millera
Opis:
The results of the modification of austenitic matrix in cast high-manganese steel containing 11÷19% Mn with additions of Cr, Ni and Ti were discussed. The introduction of carbide-forming alloying elements to this cast steel leads to the formation in matrix of stable complex carbide phases, which effectively increase the abrasive wear resistance in a mixture of SiC and water. The starting material used in tests was a cast Hadfield steel containing 11% Mn and 1.34% C. The results presented in the article show significant improvement in abrasive wear resistance and hardness owing to the structure modification with additions of Cr and Ti.
Źródło:
Archives of Foundry Engineering; 2015, 15, 2; 35-38
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of manganese on yield and quality of hydroponically grown lettuce
Autorzy:
Przybysz, A.
Wrochna, M.
Gawrońska, H.
Małecka-Przybysz, M.
Pietrzyk, S.
Gawroński, S. W.
Powiązania:
https://bibliotekanauki.pl/articles/960140.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
Hydroponic production of leafy vegetables sustains consumption of fresh produce all year round. However, cultivation of leafy vegetables in a growing medium prepared from water contaminated with trace elements, particularly manganese (Mn), may affect both the plant products and their consumers. Therefore, an attempt was made in the present study to evaluate the effect of treating two cultivars of lettuce (cv. Locarno and cv. Satine) with Mn (0.5 – control, 5, 25 and 50 mg dm-3) on (i) the concentration of Mn and other elements, (ii) biomass accumulation, (iii) the efficiency of the photosynthetic apparatus, (iv) the levels of ROS (reactive oxygen species), (v) the activity of antioxidative enzymes, and (vi) the content of phenolic compounds. Increased concentrations of Mn in the growing medium led to a significantly higher concentration of this element in lettuce leaves (up to a 9.4-fold increase), but concentrations of potassium, calcium and magnesium were almost unchanged. Although the intensity of photosynthesis was lower in both of the examined cultivars, biomass accumulation was slightly reduced only in cv. Locarno. The recorded toxic effect of Mn most probably resulted from the induced generation of ROS, levels of which usually increase albeit insignificantly in plants treated with the tested metal. Higher generation of ROS was to some extent counteracted by the increased activity of antioxidative enzymes (ascorbate peroxidase and catalase) and a higher content of phenolic compounds. The results of this study demonstrate that increased accumulation of Mn in lettuce not only impairs the plant growth, but may also pose a risk to human health, as these plant products may become dietary sources of Mn and elevated levels of ROS.
Źródło:
Journal of Elementology; 2017, 22, 1
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of manganese on nutrient content in tomato (Lycopersicon esculentum Mill.) leaves
Autorzy:
Kleiber, T.
Powiązania:
https://bibliotekanauki.pl/articles/14126.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
Manganese (Mn) is a microelement, but it is also a heavy metal whose excess may have a toxic effect on plants. The aim of the study was to evaluate the effect of an application of increasing Mn concentrations added to a nutrient solution on the content of macro- and mi- cronutrients in tomato leaves (Lycopersicon esculentum Mili., cv. Alboney F4 and Emotion F,). Plants were grown in rockwool using a nutrient solution with the following content of manganese (mg dm'3): 0.06; 0.3; 0.6; 1.2 (experiment I, in 2008-2011); 2.4, 4.8; 9.6; 19.2 mg dm3 (expe- riment II, in 2012) - designated the symbols Mn-0; Mn-0.3; Mn-0.6; Mn-1.2; Mn-2.4; Mn-4.8; Mn-9.6; Mn-19.2. The nutrient solution used for plant fertigation had the following Chemical composition (mg dm'3): N-N'H4 2.2, N-N03 230, P 50, K 430, Ca 145, Mg 65, Cl 35, S-SO, 120, Fe 2.48, Zn 0.50, Cu 0.07, pH 5.50, EC 3.00 mS cm1. Manganese significantly influenced the content of other macro- and microelements in leaves. In variant Mn-0, the content of N, P, K, Ca, Mg, Mn decreased, while that of of Fe, Zn, Cu was higher; in Mn-1.2, the content of N, Mg, Fe, Zn decreased and that of P, K, Ca, Mn increased compared with the variants which ensured optimal yielding. In the rangę of manganese nutrition from Mn-4.8 to Mn-19.2, N, K, Mg, Fe, Zn, Cu were lower and the content of P and Mn was higher (above optimal). The cultivar significantly modified the nutrient status of plants concerning nitrogen (for Mn-9.6 and Mn-19.2), pho- sphorus (for Mn-1.2 and Mn-2.4), potassium (for Mn-4.8 and Mn-9.6), calcium (for Mn-0, Mn-1.2, Mn-9.6), magnesium (Mn-0 and Mn-0.6), iron (Mn-0, Mn-0.3, Mn-9.6), manganese (Mn-0.3, Mn- 1.2, Mn-2.4, Mn-19.2), iron (Mn-0, Mn-0.3, Mn-9.6), zinc (Mn-0.6, Mn-1.2, Mn-2.4, Mn-9.6) and copper (Mn-2.4, Mn-4.8, Mn-9.6, Mn-19.2). Briefly, both deficit or excess manganese nutrition could induce disorders in the uptake of other nutrients, which may influence plant yielding.
Źródło:
Journal of Elementology; 2015, 20, 1
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of manganese ions addition orders on the flotation behavior of scheelite
Autorzy:
Lu, Kuanwei
Chen, Rong
Zhang, Ying
Luo, Hongying
Yang, Hu
Cai, Jiaozhong
Powiązania:
https://bibliotekanauki.pl/articles/1845215.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
manganese ion
addition order
scheelite
sodium silicate
flotation
Opis:
In this study, the effect of MnCl2 on scheelite flotation with sodium oleate (NaOL) as a collector and sodium silicate as a depressant was assessed by a combination of flotation experiments, Fouriertransform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and solution chemistry. The flotation experiments confirmed that the addition of MnCl2 before sodium silicate showed an adverse effect on flotation and the recovery of scheelite gradually decreased as the amount of MnCl2 was increased. When MnCl2 was added afte r sodium silicate, the recovery of scheelite gradually increased with an increase in the amount of MnCl2. The results of FTIR, XPS, and solution chemistry indicated that MnCl2 acted on the surface of scheelite in the form of manganese ions. When MnCl2 was added before sodium silicate, manganese ions adsorbed on the surface of scheelite reacted with sodium silicate to form a hydrophilic silicate, which covers the surface of scheelite and blocks the adsorption of NaOL. However, when MnCl2 was added after sodium silicate, manganese ions are continued to be adsorbed on the surface of scheelite, which increases the cations on the surface of scheelite, and hence the condition becomes conducive for the interaction between scheelite and NaOL.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 5; 860-873
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Manganese Concentration on Thermoluminescent Properties of $YAlO_{3}:Mn$ Crystals
Autorzy:
Zhydachevskii, Ya.
Suchocki, A.
Berkowski, M.
Warchol, S.
Powiązania:
https://bibliotekanauki.pl/articles/1550510.pdf
Data publikacji:
2010-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.60.Kn
61.80.Ed
61.72.Ji
Opis:
This work is devoted to experimental study of the effect of manganese concentration on thermoluminescent properties of $YAlO_{3}:Mn$ crystals grown by the Czochralski method. A new type of emitting centers beside of $Mn^{4+}$ and $Mn^{2+}$ ions was revealed at low concentration of manganese ions in the crystal. These centers are responsible for the high-temperature thermoluminescent peak at 570 K. A potential of this thermoluminescent peak for thermoluminescence dosimetry application is discussed.
Źródło:
Acta Physica Polonica A; 2010, 117, 1; 177-180
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on increasing manganese nutrition effect of tomato (Lycopersicon esculentum Mill.) on differentiation of rhizosphere chemical composition
Badanie wpływu wzrastającego żywienia pomidora (Lycopersicon esculentum Mili.) manganem na skład chemiczny strefy korzeniowej
Autorzy:
Kleiber, T.
Powiązania:
https://bibliotekanauki.pl/articles/271254.pdf
Data publikacji:
2014
Wydawca:
Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
Tematy:
manganese
nutrient solution
root zone
pH
EC
mangan
pożywka
strefa korzeniowa
Opis:
The aim of the conducted studies was to assess the effect of increasing Mn concentrations (within the range from 0.06 mg-dm-3up to 19.2 mg-dm-3) on chemical composition of tomato rhizosphere (Lycopersicon esculentum Mill. cvs. ‘Alboney F1’ and ‘Emotion F1’) grown in rockwool. For plant fertigation was used nutrient solution with the following chemical composition (mg-dm-3): N-NH4 2.2, N-N03 230, P 50, K 430, Ca 145, Mg 65, Cl 35, S-S04120, Fe 2.48, Zn 0.50, Cu 0.07, pH 5.50, EC 3.00 mS-cm-1. It was studied the following contents of manganese in nutrient solution (mg-dm-3): 0.06; 0.3; 0.6; 1.2 (experiment I, years 2008-2011); 2.4; 4.8; 9.6; 19.2 mg-dm-3 (experiment II, year 2012) - described as Mn-0; Mn-0.3; Mn-0.6; Mn-1.2; Mn-2.4; Mn-4.8; Mn-9.6; Mn-19.2. Increasing concentration of manganese applied in nutrient solution significantly changed the chemical composition of solution in slabs. Within range of manganese in nutrient solution up to 1.2 mg-dm-3 was found significantly increase content of: N-N03, Ca, Mg, S-S04,Zn (except Mn-1.2), Na, Cl, pH (alkalization) and EC with simultaneous decrease content of: K (except Mn-0), Fe, Mn. Changes of P-P04 and Cu were multidirectional. Within range of manganese in nutrient solution from 2.4 to 19.2 mg-dm-3 was found significantly increase content of: Ca, Cu, Na, pH (alkalization) and EC (for ‘Emotion F1) with simultaneous decrease content of: N-N03, P-P04, K, Fe, Mn. Changes of Mg, S-S04, Zn, Cl and EC (for ‘Alboney F1’) were multidirectional.
Celem przeprowadzonych badań była ocena wpływu wzrastających stężeń manganu (w zakresie od 0,06 mg-dm-3 do 19,2 mg-dm-3) na skład chemiczny strefy korzeniowej pomidora (Lycopersicon esculentum Mill. cvs. ‘Alboney F1’ and ‘Emotion F1’) uprawianego w wełnie mineralnej. Do fertygacji roślin stosowano pożywkę standardową o następującym składzie chemicznym (mg-dm-3): N-NH4 2,2; N-N03 230; P 50, K 430, Ca 145, Mg 65, Cl 35, S-S04 120, Fe 2,48, Zn 0,50, Cu 0,07, pH 5,50, EC 3,00 mS-cm-1. Badano następujące zawartości manganu w pożywce (w mg-dm-3): 0,06; 0,3; 0,6; 1,2 (eksperyment I, lata 2008- 2011); 2,4; 4,8; 9,6; 19,2 mg-dm-3 (eksperyment II, rok 2012) - opisane jako Mn-0; Mn-0,3; Mn-0,6; Mn- 1,2; Mn-2,4; Mn-4,8; Mn-9,6; Mn-19,2. Wzrastające stężenia manganu stosowanego w pożywce istotnie modyfikowały skład chemiczny strefy korzeniowej roślin. W zakresie zawartości manganu w pożywce do 1,2 mg-dm-3 stwierdzono istotny wzrost zawartości: N-N03, Ca, Mg, S-S04,Zn (poza Mn-1,2), Na, Cl, pH (alkalizacja) i EC, przy równoczesnym obniżeniu zawartości: K (poza Mn-0), Fe, Mn. Zmiany zawartości P-P04 i Cu były wielokierunkowe. W zakresie zawartości manganu w pożywce od 2,4 do 19,2 mg-dm-3 stwierdzono istotny wzrost zawartości: Ca, Cu, Na, pH (alkalizacja) oraz EC (w przypadku ‘Emotion F1’), przy równoczesnym obniżeniu zawartości: N-N03, P-P04, K, Fe, Mn. Zmiany Mg, S-S04, Zn, Cl i EC (dla ‘Alboney F1’) były wielokierunkowe.
Źródło:
Aparatura Badawcza i Dydaktyczna; 2014, 19, 2; 119-126
2392-1765
Pojawia się w:
Aparatura Badawcza i Dydaktyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of manganese seed dressings effect on healthiness of spring barley
Ocena działania manganowej zaprawy nasiennej na zdrowotność jęczmienia jarego
Autorzy:
Gleń, K.
Boligłowa, E.
Znój, K.
Powiązania:
https://bibliotekanauki.pl/articles/126724.pdf
Data publikacji:
2013
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
barley
fungal diseases
Teprosyn Mn
jęczmień
choroby grzybowe
Opis:
The effect of seed dressings: Teprosyn Mn and Raxil Gel 206 on intensification of fungal diseases of culm base, leaves and ears occurrence during the vegetation period of spring barley, Poldek c.v., were assessed in the paper. The applied seed dressings had a notable influence on the intensification of such barley diseases occurrence as: leaf spot caused by B. sorokiniana and Fusarium spp., barley stripe (Pyrenophora graminea), fusarium foot rot (Fusarium spp.) and ear spots (B. sorokiniana). Raxil Gel 206 and Teprosyn Mn preparations revealed a considerable and approximate efficiency in barley protection against fusarium foot rot and leaf spot. On the plots where grain was treated with these preparations pre-sowing, the share of plants showing symptoms of fusarium foot rot was smaller by half than on the control plots, and also the value of index of leaf infection by B. sorokiniana and Fusarium spp. decreased significantly. In comparison with Raxil Gel 206 dressing, manganese Teprosyn Mn dressing showed a significantly higher effectiveness in reducing barley stripe occurrence. It has been evident as a 23.36% lower share of plants infected by Pyrenophora graminea and 14.37% lower value of infection index.
W pracy oceniono wpływ zapraw nasiennych: Teprosyn Mn i Raxil Gel 206 na występowanie chorób grzybowych podstawy źdźbła, liści i kłosów jęczmienia jarego odmiany Poldek. Testowane preparaty istotnie modyfikowały nasilenie plamistości liści (kompleks grzybów B. sorokiniana i Fusarium spp.), pasiastość liści jęczmienia (P. graminea), fuzaryjną zgorzel podstawy źdźbła (Fusarium spp.) oraz plamistość kłosów (B. sorokiniana). Preparaty Raxil Gel 206 i Teprosyn Mn wykazały dużą skuteczność w ochronie jęczmienia przed fuzaryjną zgorzelą podstawy źdźbła i plamistością liści. Udział roślin z objawami fuzaryjnej zgorzeli był o połowę mniejszy niż w obiekcie kontrolnym, istotnie obniżyła się również wartość indeksu porażenia liści przez B. sorokiniana i Fusarium spp. Zaprawa Teprosyn Mn wykazała istotnie większą skuteczność w ograniczeniu występowania pasiastości liści jęczmienia. Wyrazem tego jest o 23,4% mniejszy udział roślin porażonych przez P. graminea oraz o 14,4 niższa wartość indeksu porażenia.
Źródło:
Proceedings of ECOpole; 2013, 7, 1; 59-65
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Variable Manganese Content on Microstructure of Al-Cu Alloys
Autorzy:
Stąpór, S.
Górny, M.
Kawalec, M.
Gracz, B.
Powiązania:
https://bibliotekanauki.pl/articles/355992.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Cu-Mn alloys
microstructure
macrostructure
DSC
Opis:
The presented access the influence of Mn content (0-0.94 wt.%) on the course of the cooling curves, phase transformation, macrostructure, and microstructure of Al-Cu alloys for three series: initial (Series I), with the addition of an AlTi master (Series II), and modified with AlTi5B1 (Series III). The maximum degree of undercooling ΔT was determined based on the cooling curves. The surface density of the grains (NA ) was determined and associated with the inverse of solidification interval 1/ΔTk . Titanium (contained in the charge materials as well as the modifier) has a significant effect on the grinding of the primary grains in the tested alloys. A DSC thermal analysis allowed for the determination of phase transition temperatures under conditions close to equilibrium. For series II and III, the number of grains decreases above 0.2 wt.% Mn with a simultaneous increase in solidification interval 1/ΔT2 . The presence of Al2 Cu eutectics as well as the Cu-, Fe-, and Mn-containing phases in the examined samples was demonstrated using scanning electron microscopy.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 4; 1377-1383
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and Evaluation of Effect of Manganese Content on Properties of EN AC 46000 Aluminum Alloy
Autorzy:
Pasternak, Martyna
Brzeziński, Marcin
Piwowarczyk, Gabriela
Powiązania:
https://bibliotekanauki.pl/articles/107001.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
aluminum alloy
pressure casting
manganese
strength of material
Opis:
This article is the effect of industrial work and many surveys in the one of the Polish foundries that specialize in aluminum alloys. The main goal of our explorations is to evaluate the influence of manganese on Al-Si alloy properties. In die-cast alloys, it is recommended to use larger amounts of iron to reduce the impact on the pressure chamber and mold. Manganese neutralizes the harmful effect of iron by changing the morphology of the separated brittle ferrous phases. The unfavorable form of the iron-containing phases in the form of long needles changes into the forms of fine compact crystals, which are less harmful to the mechanical properties. Nowadays, the main client requirement is to obtain the right parameters at the best price. Specifically, the customer is in the automotive industry, where new technologies provide a connection between the high quality and low weight of car parts [1–3].
Źródło:
Journal of Casting & Materials Engineering; 2019, 3, 1; 14-18
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Manganese on the Crystallisation Process, Microstructure and Selected Properties of Compacted Graphite iron
Autorzy:
Gumienny, G.
Kurowska, B.
Just, P.
Powiązania:
https://bibliotekanauki.pl/articles/354354.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
compacted graphite iron
crystallization
manganese
DTA method
Opis:
The paper presents the effect of manganese on the crystallization process, microstructure and selected properties: cast iron hardness as well as ferrite and pearlite microhardness. The compacted graphite was obtained by Inmold technology. The lack of significant effect on the temperature of the eutectic transformation was demonstrated. On the other hand, a significant reduction in the eutectoid transformation temperature with increasing manganese concentration has been shown. The effect of manganese on microstructure of cast iron with compacted graphite considering casting wall thickness was investigated and described. The nomograms describing the microstructure of compacted graphite iron versus manganese concentration were developed. The effect of manganese on the hardness of cast iron and microhardness of ferrite and pearlite were given.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1269-1275
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Manganese on Magnetic and Electrical Properties of the RMn$\text{}_{x}$T$\text{}_{12-x}$ Alloys
Autorzy:
Suski, W.
Wochowski, K.
Mydlarz, T.
Belan, B.
Powiązania:
https://bibliotekanauki.pl/articles/2014385.pdf
Data publikacji:
2000-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Gg
75.20.-g
75.20.En
75.50.Ee
Opis:
The magnetic and electrical properties of the tetragonal, ThMn$\text{}_{12}$-type RMn$\text{}_{x}$T$\text{}_{12-x}$ alloys (R = Y, Ce, Pr, Nd, Sm and T = Fe, Co, Ni) were studied in broad temperature and magnetic field ranges to elucidate an influence of manganese on the magnetic ordering in these materials. Magnetic properties were examined at T=1.7-300K in magnetic field up to 14T, whereas the electrical properties were examined at T=4.2-300K, on the polycrystalline samples. Majority of the samples exhibit ferro- or ferrimagnetic properties. Some samples containing larger concentration of Mn are paramagnetic in the whole temperature range. The electrical resistivity of these alloys shows metallic character.
Źródło:
Acta Physica Polonica A; 2000, 98, 5; 505-511
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Manganese and Iron Content on Morphology of Iron Intermetallic Phases in AlSi7Mg0.3 Alloy
Autorzy:
Podprocká, R.
Bolibruchová, D.
Powiązania:
https://bibliotekanauki.pl/articles/382655.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
AlSi7Mg0,3 alloy
needle Al5FeSi phase
manganese
phase morphology
stop AlSi7Mg0,3
mangan
morfologia fazy
Opis:
Iron is presented as an impurity in Al-Si alloys and occurs in the form of the β-Al5FeSi phase formations. The presence of iron and other elements in the alloy causes the formation of large intermetallic phases. Due to the high brittleness of this phase, it reduces the mechanical properties and increases the porosity. Manganese is used to inhibit the formation of this detrimental phase. It changes the morphology of the phase to polyhedral crystals, skeletal formations, or Chinese script. The present article deals with the influence of various amounts of manganese (0.1; 0.2; 0.4; 0.6 wt. %) on the formation of iron-based intermetallic phases in the AlSi7Mg0.3 alloy with different levels of iron content (0.4; 0.8, 1.2 wt. %). The increase of iron content in each alloy caused the creation of more intermetallic compounds and this effect has been more significant with higher concentrations of manganese. In alloys where the amount of 1.2 wt. % iron is present, the shape of eutectic silicon grain changes from angular to short needle type.
Źródło:
Archives of Foundry Engineering; 2018, 18, 2; 95-99
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of manganese treatment on pathogenic fungi isolated from barley kernels
Oddziaływanie nawozu manganowego na grzyby patogeniczne izolowane z ziarniaków jęczmienia
Autorzy:
Gleń-Karolczyk, K.
Boligłowa, E.
Powiązania:
https://bibliotekanauki.pl/articles/388049.pdf
Data publikacji:
2015
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
manganese treatment
pathogenic fungi
linear growth
sporulation
nawóz manganowy
grzyby fitopatogenne
wzrost liniowy
zarodnikowanie
Opis:
Teprosyn Mn manganese seed treatment, manufactured by a British firm Phosyn Chemicals Ltd., which was tested in the experiment, has been available on the Polish market for several years. Applied as a seed treatment it results in more intensive development of root system and improves general plant condition. However, in the available literature lacks information on Teprosyn Mn effect on plant healthiness or pathogenic organisms. The aim of the paper was to compare the effect of Teprosyn Mn fertilizer and Raxil Gel 206 chemical seed treatment on pathogenic fungi species: Fusarium culmorum (W.G. Smith) Sacc., Fusarium poae (Peck) Wollen., Fusarium avenaceum (Fr.) Sacc., Bipolaris sorokiniana (Sacc. in Sorok.) Shoem. and Botrytis cinerea Pers. In laboratory conditions the dynamics of growth and sporulation of the above mentioned fungi were assessed on PDA medium with a supplement of 0.1; 0.5 and 1.0 mm3 · cm–3 of Teprosyn Mn and 0.005; 0.05 and 0.5 mm3 · cm–3 of Raxil Gel 206. In vitro Teprosyn Mn manganese fertilizer reveals weak and diversified effect on linear growth of the studied phytopathogens. In the highest concentration (1.0 mm3 · cm–3) it reduces the growth of Fusarium avenaceum, Botrytis cinerea and Fusarium poae colonies on the level of 7.3–10.1 %, whereas all its concentrations inhibit the sporulation process in B. cinerea i F. avenaceum from 35.3 % to 66 %. Along with increasing concentration in the medium its stimulating effect on linear growth of Bipolaris sorokiniana raises (5.7–18.3 %) and the spore number increases from 40 to 271.5 %.
W doświadczeniu testowano nawóz manganowy Teprosyn Mn, produkowany przez angielską firmę Phosyn Chemicals Ltd., który od kilku lat jest on dostępny na polskim rynku. Efektem jego stosowany jako zaprawy nasiennej (nawóz donasienny) jest intensywniejszy rozwój systemu korzeniowego oraz polepszenie ogólnej kondycji roślin. W dostępnej literaturze brakuje informacji dotyczących oddziaływania Teprosynu Mn na zdrowotność roślin oraz organizmy patogeniczne. Celem pracy było porównanie oddziaływania nawozu donasiennego Teprosyn Mn i chemicznej zaprawy nasiennej Raxil Gel 206 na patogeniczne gatunki grzybów: Fusarium culmorum (W.G. Smith) Sacc., Fusarium poae (Peck) Wollen., Fusarium avenaceum (Fr.) Sacc., Bipolaris sorokiniana (Sacc. in Sorok.) Shśm. i Botrytis cinerea Pers. W warunkach laboratoryjnych oceniono dynamikę wzrostu i sporulację wymienionych grzybów na podłożu (PDA) z udziałem 0.1; 0.5; 1.0 mm3 · cm–3 Teprosynu Mn oraz 0.005; 0.05; 0.5 mm3 · cm–3 Raxil Gel 206. Nawóz manganowy Teprosyn Mn w warunkach in vitro wykazuje słabe i zróżnicowane oddziaływanie na rozrost liniowy badanych fitopatogenów. W największym stężeniu (1.0 mm3 · cm–3) ogranicza o 7,3 do 10,1 % rozrost kolonii: Fusarium avenaceum, Botrytis cinerea i Fusarium poae. Natomiast we wszystkich stężeniach hamuje proces wytwarzania zarodników przez B. cinerea i F. avenaceum w zakresie od 35,3 % do 66 %. Wraz ze zwiększaniem stężenia w podłożu hodowlanym rośnie jego stymulujące oddziaływanie na wzrost liniowy Bipolaris sorokiniana (od 5,7 do 18,3 %) oraz zwiększa się ilość zarodników od 40 do 271,5 %.
Źródło:
Ecological Chemistry and Engineering. A; 2015, 22, 4; 489-496
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 72

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