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Wyświetlanie 1-15 z 32
Tytuł:
Comparison of corrosion resistance in physiological saline solution of two austenitic stainless steels – 316LV and REX734
Autorzy:
Romańczuk, E.
Oksiuta, Z.
Powiązania:
https://bibliotekanauki.pl/articles/387266.pdf
Data publikacji:
2017
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
REX734 austenitic stainless steel
316 LV austenitic stainless steel
potentiodynamic corrosion tests
XRD analysis
SEM observation
Opis:
In this work two austenitic stainless steels, REX734 and 316LV were tested in terms of their microstructure and corrosion properties. The REX734 is a newer generation stainless steel, with modified chemical composition, in comparison to the 316LV grade. Potentiodynamic study of corrosion resistance was conducted in physiological saline solution (0.9% NaCl solution). In spite of the similarities of microstructure, grain size and phase structure in both materials, the corrosion tests revealed that the REX734, with lower nickel and higher nitrogen content, had better corrosion resistance than 316LV. Repassivation potential in the REX734 was almost six times higher than for the 316LV steel. Superior corrosion resistance of the REX734 steel was also confirmed by surface observations of both materials, since bigger and more densely distributed pits were detected in 316LV alloy.
Źródło:
Acta Mechanica et Automatica; 2017, 11, 2; 91-95
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corrosion Resistance of X5CrNi18-10 Stainless Steel
Autorzy:
Kciuk, M.
Lasok, S.
Powiązania:
https://bibliotekanauki.pl/articles/352190.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
austenitic stainless steel
sensitization
corrosion resistance
potentiodynamic tests
Opis:
The paper presents the influence of heat treatment on the structure and corrosion resistance of X5CrNi18-10 steel. To determine the structure which has been obtained after heat treatment the methods of light and scanning electron microscopy with EDS microanalysis were used. The electrochemical corrosion properties of the investigated steel were studied in 3.5% NaCl solution using potentiodynamic polarization tests. Basing on the registered curves, the corrosion current, polarization resistance and corrosion potential were determined. The corrosion tests were followed by fractographic researches.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 4; 2101-2106
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Vacuum Sintered and Selective Laser Melted Steel AISI 316L
Autorzy:
Brytan, Z.
Powiązania:
https://bibliotekanauki.pl/articles/351485.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
austenitic stainless steel
316L
selective laser melting
SLM
Opis:
The paper presents the results of the basic mechanical properties determined in the static tensile test, impact un-notched Charpy test and hardness of austenitic stainless steel type 316L produced by two techniques: classical pressing and sintering in a vacuum with rapid cooling and selective laser melting (SLM). In this work fracture surface of Charpy test, samples were studied. The results indicate that application of selective laser melting (SLM) makes it possible to double increase the strength properties of components manufactured from austenitic stainless steel type 316L compared to sintering in a vacuum. Resulted in mechanical properties strongly depend on porosity characteristic and the presence of superficial oxides in the case of sintered steel and the character of observed microstructural defects deriving from non-fully melted powder particles and the formation of voids between subsequently melted pool tracks during the SLM.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 4; 2125-2131
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of porosity on the properties of nickel-free stainless steel obtained by powder metallurgy route
Autorzy:
Romańczuk-Ruszuk, Eliza
Lipowicz, Paweł
Sztorch, Bogna
Przekop, Robert
Powiązania:
https://bibliotekanauki.pl/chapters/2196290.pdf
Data publikacji:
2022
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
nickel-free austenitic stainless steel
powder metallurgy
porosity
mechanical alloying
corrosion resistance
Opis:
This paper presents the results of research on nickel-free austenitic stain- less steel with the composition Fe-18% Cr-12% Mn, obtained by powder metallurgy, with the use of mechanical alloying of elementary powders, manganese nitride and various process atmospheres. The influence of different protective atmosphere of the process (nitrogen and argon) and the addition of manganese nitride on poros- ity, microstructure, hardness and corrosion resistance of the sinters was described. Steel samples after pressing and sintering at 1200°C (1473 K) in nitrogen were char- acterized by a relative density above 80% and a porosity among 12–19%. In tested materials the pores on the surface are visible in each of the tested materials, which is confirmed by SEM images. The material obtained from powders with manganese nitride after mechanical alloying in nitrogen is characterized by the highest hard- ness and corrosion resistance. The addition of manganese nitride can be another way of introducing nitrogen into nickel-free steel.
Źródło:
Advances in biomedical engineering; 181–190
9788367185400
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Martensite Content of Cold-Worked AISI 304L Chromium-Nickel Austenitic Steel
Autorzy:
Opiekun, Z. A.
Pająk, D.
Powiązania:
https://bibliotekanauki.pl/articles/379888.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
austenitic stainless steel
longitudinal rolling
martensitic phase
stal austenityczna
walcowanie wzdłużne
faza martenzytyczna
Opis:
The paper presents the effect of plastic strain occurring at room temperature in annealed samples of AISI 304L austenitic chromium-nickel steel on content of strain-induced &alpha′ martensite in its structure. The strain was introduced by longitudinal rolling of the samples with constant strain rate of about 300 mm/s and relative cold work ranging from 5% to 90% It has been demonstrated that the share of &alpha′ martensite in microstructure of the steel determined by means of Feritscope FMP30 depends on the degree of cold work.
Źródło:
Archives of Foundry Engineering; 2014, 14, 1 spec.; 155-158
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel deep penetrating eddy current probe based on phase shifted fields and its application to inspection of defects
Autorzy:
Wu, Meixian
Zhang, Dongli
Wang, Chuanglong
Powiązania:
https://bibliotekanauki.pl/articles/221582.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
skin effect
penetration depth
austenitic stainless steel
eddy current probe
phase shifted fields
Opis:
Due to the skin effect of eddy currents, the depth of cracks which can be detected by the traditional eddy current probe is very limited. In order to improve the ability of eddy current probes to inspect deep cracks in metal thick-walled structures, a new eddy current probe using an excitation system with phase shifted fields was proposed. Its feasibility for detecting deep cracks was verified by simulation and experiments. The results showed that the penetration depth of eddy currents in austenitic stainless steel is effectively enhanced by using the new probe.
Źródło:
Metrology and Measurement Systems; 2020, 27, 2; 275-287
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of ageing on microstructure and mechanical properties of TP347HFG austenitic stainless steel
Autorzy:
Golański, Grzegorz
Purzyńska, Hanna
Powiązania:
https://bibliotekanauki.pl/articles/2204539.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
austenitic stainless steel
precipitates
microstructure
mechanical properties
mikrostruktura
właściwości mechaniczne
stal austenityczna nierdzewna
wytrącanie
Opis:
The paper presents the results of microstructural and mechanical investigation of long-term aged TP347HFG austenitic stainless steel. Ageing was performed at a time of up to 30 000 hours and the temperature of 600 and 650◦C. Ageing was proved to lead to the precipitation of secondary phase particles not only inside grains but also on the boundaries of grains and twins. The MX precipitates were observed inside the grains. However, M23C6 carbides and sigma phase precipitates were observed on grain boundaries. The changes in the microstructure of the examined steel translated into the mechanical properties, i.e. initially observed growth and then the decrease of yield strength and a gradual decrease in impact energy. The overageing process – a decrease in strength properties – was associated with the growth of the size of M23C6 carbides and the precipitation of the sigma phase. The reduction of impact energy in TP347HFG austenitic stainless steel was found to be associated with the precipitation of M23C6 carbides in the case of the 600◦C temperature, and the M23C6 carbides and sigma phase in the case of the 650◦C temperature. The rate of changes in the microstructure and mechanical properties depended on the ageing temperature.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 2; art. no. e144607
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corrosion of AlSi 304L Austenitic Stainless Steel in Non-Stationary Aqueous HCl + NaCl Solution
Autorzy:
Opiekun, Z. A.
Orłowicz, A. W.
Kupiec, B.
Powiązania:
https://bibliotekanauki.pl/articles/383327.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
austenitic stainless steel
structures
hardness
microhardness
stress
corrosion
stal austenityczna
struktury
twardość
mikrotwardość
naprężenie
korozja
Opis:
The paper describes the process of stress corrosion in a Ø50 mm rod made of AISI 304L austenitic chromium-nickel steel. Discs cut off from the steel rod were moved at a speed of 1.25 m/s for a test period of 408 h in a corrosive environment of aqueous solution containing 3% HCl and 8.6 g NaCl at room temperature. It was found that deepest cracks and irregular pitting occurred locally in areas of microstructure containing grains of hard lamellar &alpha' martensite and along boundaries between filamentary delta ferrite (Feδ) precipitates and &alpha′ phase. The corrosion developed in a trans-crystalline manner with branches propagating along boundaries of lamellar &alpha′ phase grains.
Źródło:
Archives of Foundry Engineering; 2014, 14, 1 spec.; 165-168
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The studies of corrosion resistance of AISI 316Ti SS in Ringer’s solution after electropolishing and passivation in nitric acid
Autorzy:
Rokosz, Krzysztof
Hryniewicz, Tadeusz
Solecki, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/1177846.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
AISI 316Ti/EN 1.4571
austenitic stainless steel
electropolishing
passivation
pitting corrosion
potentiodynamic corrosion measurements
Opis:
In present work, the continuation of general and pitting corrosion analysis of austenitic AISI 316Ti (EN 1.4571) stainless steel in Ringer's solution, is presented. The corrosion was studied by using the ATLAS 98 potentiostat with platinum EPT-101 and calomel reference EK-101P electrodes. The three types of specimens, i.e. as received (without any pretreatment), after abrasive mechanical polishing (MP), and after electrochemical polishing (EP), were used. The best pitting corrosion resistance was recorded for electropolished and passivated (in 20% vol. HNO3 for 30 minutes) surface, i.e. the pitting potential was equal to 761 mVSCE (855.4 ± 58.5 mVSCE), while the worst one was recorded for mechanically ground samples and the pitting corrosion potential was equal to 270 mVSCE (378.8 ± 60.3 mVSCE).
Źródło:
World Scientific News; 2018, 98; 46-60
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strength analysis of nitrided layers on austenitic stainless steel based on acoustic emission (AE) mesurements
Analiza wytrzymałościowa warstw azotowanych wytworzonych na austenitycznej stali nierdzewnej na podstawie pomiarów emisjii akustycznej (AE)
Autorzy:
Wojnar, J.
Powiązania:
https://bibliotekanauki.pl/articles/213857.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
analiza wytrzymałościowa
austenityczna stal nierdzewna
pomiary emisji akustycznej
strength analysis
austenitic stainless steel based
acoustic emission (AE)
Opis:
The aim of this work was to characterize deformation and failure mechanisms of layers formed during nitriding on austenitic stainless steel. The characterization was based on acoustic emission measurements performed during the static tensile test. The experimental work included the plasma nitriding process of stainless steel grade 304 samples, microhardess measurements, microstructural investigation and XRD phase analysis. The main investigation technique used was the acoustic emission measurement. The acoustic characteristics - RMS voltage, and energy, have turned out to be especially useful, as they enable to determine the real yield limit, the exact stress-strain conditions of fracture initiation at the nitrided surface and the dynamics of the fracture progress.
Detonacja jest zjawiskiem, które znane jest nauce od ponad stu lat. Na ogół rozumiemy ten proces szybkiego spalania, jednak szczegóły struktury detonacji i jej mechanizm chemiczny są nadal przedmiotem intensywnych badań ze względu na ich znaczenie praktyczne. W ostatnim okresie prace badawcze nad silnikiem z wirującą detonacją (RDE) dały nowy impuls dla badań nad zjawiskiem detonacji. Z powodu geometrycznej złożoności zjawiska wirującej i obracającej się detonacji, konieczne są nowe narzędzia do badań, eksperymentalne i numeryczne. Szczególnie ważne są bardzo silne programy do symulacji silników z wirującą detonacją. Powinny one umożliwić rozwiązanie szczegółów w polu przepływu, które są niedostępne lub nawet niemożliwe do uzyskania z analizy wyników eksperymentalnych. Z drugiej strony, jeżeli zostaną one potwierdzone, mogą być one użytecznym narzędziem w przyszłości do optymalizacji silnika z wirującą detonacją. W artykule przedstawiono najnowsze próby wykorzystania takich metod, które mają umożliwić trójwymiarowe modelowanie detonacji – w ogólności, a w szczególności – modelowanie silnika z wirującą detonacją.
Źródło:
Prace Instytutu Lotnictwa; 2009, 5 (200); 198-204
0509-6669
2300-5408
Pojawia się w:
Prace Instytutu Lotnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corrosion behavior of Cr-Ni-Mo stainless steel in chemically modified chloride solution
Autorzy:
Zatkalíková, Viera
Markovičová, Lenka
Štrbák, Milan
Powiązania:
https://bibliotekanauki.pl/articles/34670831.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
austenitic stainless steel
pitting corrosion resistance
inorganic inhibitor
stal austenityczna nierdzewna
odporność na korozję wżerową
inhibitor nieorganiczny
Opis:
Cr-Ni-Mo stainless steels are susceptible to the pitting in aggressive chloride environments. One of the possible ways for the influence of their corrosion behavior is the use of inhibitors as the chemical modification of the environment. The resistance of AISI 316Ti stainless steel to the pitting with/without the inorganic inhibitor was tested by two independent corrosion tests: 24-hours exposure immersion and potentiodynamic polarization test. Both tests were carried out in 1M chloride acidic solution with/without 0.1M molybdate inhibitor at room temperature. Results of immersion tests were evaluated by the corrosion rates calculated from corrosion losses and by the morphology of the pitting. Potentiodynamic polarization curves were evaluated by the pitting potentials.
Źródło:
Quality Production Improvement - QPI; 2021, 3, 1; 299-304
2657-8603
Pojawia się w:
Quality Production Improvement - QPI
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corrosion properties of 1.4512 ferritic and 1.4404 austenitic steels for the automotive industry
Autorzy:
Zatkalíková, Viera
Markovičová, Lenka
Wróbel-Knysak, Anna
Powiązania:
https://bibliotekanauki.pl/articles/88716.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
corrosion
ferritic stainless steel
austenitic stainless steel
cyclic potentiodynamic test
exposure test
stal ferrytyczna odporna na korozję
stal austenityczna
test potencjodynamiczny
test ekspozycji
Opis:
Exhaust systems are susceptible to in-service wear because of their exposition to the very aggressive corrosive environment. Various stainless steels grades (mostly ferritic and austenitic, but also martensitic and duplex) and protective coatings are currently used for exhaust system elements to increase their aestetics and corrosion resistance. This article focuses on evaluation and comparison of the common corrosion properties of two stainless steels with different microstructures (ferritic and austenitic) used for exhaust system components at the low ambient temperature (35 °C). An aggressive acidic corrosion solution for electrochemical cyclic potentiodynamic tests (ASTM G61) was chosen to simulate partly inner (condensate) and also external environment (reaction of exhaust gases with water, chlorides in solution after winter road maintenance). Exposure tests of the pitting corrosion resistance were performed according to ASTM G48 standard method.
Źródło:
System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 745-752
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Technology for Ultrafine-Grained Materials for Usage as Materials in Nuclear Power
Autorzy:
Naizabekov, Abdrakhman
Arbuz, Alexandr
Lezhnev, Sergey
Panin, Evgeniy
Knapiński, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/27315817.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
radial-shear rolling
austenitic stainless steel
severe plastic deformation
ultrafine-grained materials
walcowanie
stal nierdzewna
odkształcenie plastyczne
materiały ultradrobnoziarniste
Opis:
Nuclear power is associated with great environmental risks. In many cases, the problem of accidents of nuclear power plants is related to the use of materials that do not fully meet the following requirements: high corrosion resistance; high temperature resistance; creep resistance; fracture toughness; stability of structure and properties under irradiation. Therefore, studies aimed at finding materials that can withstand long-term loads at high temperatures, aggressive environment and gradual structural degradation under the influence of radiation are relevant. One of the structural materials, which has high resistance to radiation, is austenitic stainless steel. And one of the ways to increase the radiation resistance of parts made of this steel grade is to grind its microstructure to ultra-fine-grained state. Such structures provide a combination of a high level of strength characteristics with high plasticity, which distinguishes such materials from their coarse-grained counterparts. Also, numerous grain boundaries serve as runoff surfaces for radiation defects, preserving the structure, which causes their increased radiation resistance. From all methods for producing sub-ultra-fine grained materials the most promising is the severe plastic deformation (SPD), which can be implemented in the metal in various ways, including radial-shear rolling. This paper presents the results of studies of the process of radial-shear rolling on the mill SVP-08 and its effect on the microstructure and properties of austenitic stainless steel. During the study, bars with a diameter of 13 mm from AISI-321 steel with a grain size of 300-600 nm were obtained, while the mechanical properties increased more than 2 times compared to the initial values.
Źródło:
New Trends in Production Engineering; 2019, 2, 2; 114-125
2545-2843
Pojawia się w:
New Trends in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corrosion Resistance of Mechanically Alloyed 14% Cr ODS Ferritic Steel
Autorzy:
Oksiuta, Z.
Och, E.
Powiązania:
https://bibliotekanauki.pl/articles/386927.pdf
Data publikacji:
2013
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
stal ferrytyczna ODS
stal austenityczna
testy korozyjne
korozja wżerowa
ODS ferritic steel
316 LV austenitic stainless steel
potentiodynamic corrosion tests
pitting corrosion
Opis:
New classes of singular fractional continuous-time and discrete-time linear systems are introduced. Electrical circuits are example of singular fractional continuous-time systems. Using the Caputo definition of the fractional derivative, the Weierstrass regular pencil decomposition and Laplace transformation the solution to the state equation of singular fractional linear systems is derived. It is shown that every electrical circuit is a singular fractional systems if it contains at least one mesh consisting of branches with only ideal supercondensators and voltage sources or at least one node with branches with supercoils. Using the Weierstrass regular pencil decomposition the solution to the state equation of singular fractional discrete-time linear systems is derived. The considerations are illustrated by numerical examples.
Źródło:
Acta Mechanica et Automatica; 2013, 7, 1; 38-41
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Special marine steels and constructional-ballistic shields designed PNA
Okrętowe stale specjalne i osłony konstrukcyjno-balistyczne opracowane w AMW
Autorzy:
Zatorski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/223064.pdf
Data publikacji:
2016
Wydawca:
Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:
austenitic stainless steel
cast steel
electrode welding
bainitic steel
constructional and ballistic shields
stal austenityczna
staliwo
elektroda do spawania
stal bainityczna
osłony konstrukcyjno-balistyczne
Opis:
In order to increase security of the country in the field of new materials and technologies and research methods were developed, patented and implemented: austenitic steel X02CrNiMoMnN21-16-5-4 with electrodes for welding of steel and high-strength bainitic steel 10GHMBA-E620T. The author developed a theoretical and technological basis for the design of marine constructional-ballistic shields, which has implemented a pilot scale and technical support. In addition, he developed an original method for testing ballistic shields and unified position to the research, which studied and co-patented.
Dla wzrostu bezpieczeństwa kraju w zakresie nowych materiałów i technologii oraz metod badawczych opracowano, opatentowano i wdrożono: stal austenityczną X02CrNiMoMnN21-16-5-4 wraz z elektrodami do spawania tej stali oraz wysokowytrzymałą stal bainityczną gat. 10GHMBA-E620T. Autor opracował teoretyczne i technologiczne podstawy projektowania okrętowych osłon konstrukcyjno-balistycznych, które wdrożył w skali półtechnicznej i technicznej. Ponadto opracował oryginalną metodę badania odporności balistycznej osłon oraz zunifikowane stanowisko do badań, które przebadał i współopatentował.
Źródło:
Zeszyty Naukowe Akademii Marynarki Wojennej; 2016, R. 57 nr 3 (206), 3 (206); 131-145
0860-889X
Pojawia się w:
Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:
Biblioteka Nauki
Artykuł
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