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Tytuł:
Analiza naprężeń i deformacji w cienkich blachach tytanowych podczas spawania wiązką elektronów
The analysis of thermally induced stresses and distortions in thin titanium sheets during electron beam welding
Autorzy:
Adamus, K.
Lacki, P.
Dudek, A.
Powiązania:
https://bibliotekanauki.pl/articles/211636.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej
Tematy:
spawanie wiązką elektronów
termiczno-mechaniczna analiza
cienkie blachy
dyfrakcja rentgenowska
naprężenia własne
deformacje spawalnicze
odstęp pomiędzy blachami
electron beam welding
thermo-mechanical analysis
thin sheets
X-ray diffraction
residual stresses
weld distortions
welding gap
Opis:
W pracy przedstawiono termiczno-mechaniczną analizę procesu spawania wiązką elektronów. W procesie spawania połączono dwie cienkie blachy wykonane z różnych gatunków tytanu, Grade 2 i Grade 5. W wyniku spawania powstały znaczne deformacje blach. Model numeryczny został opracowany na podstawie Metody Elementów Skończonych, MES. Model oblicza wpływ obciążenia termicznego na pole naprężeń i przemieszczeń. Wyniki uzyskane za pomocą modelu numerycznego zostały porównane z wynikami badań eksperymentalnych. Obliczone pole naprężeń zweryfikowano poprzez porównanie obliczonych naprężeń własnych z naprężeniami zmierzonymi na powierzchni blach za pomocą metody dyfrakcji rentgenowskiej.
This paper presents a thermo-mechanical analysis of an electron beam welding process. During the process two thin sheets made of dissimilar titanium grades, Grade 2 and Grade5, were joined together. The welding processes introduced significant distortions into the sheets. The numerical model is based on finite element method. The model calculates the impact of thermal load on stress and displacement fields. The results calculated by the model were compared with the experimental results. The calculated stress field was verified by comparing residual stresses at the external surface in a given cross-section with stress values obtained by x-ray diffraction measurements.
Źródło:
Obróbka Plastyczna Metali; 2014, 25, 2; 113-126
0867-2628
Pojawia się w:
Obróbka Plastyczna Metali
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural Transition in SrZnO Laser Pulse Deposited Alloy
Autorzy:
Albrithen, H. A.
Elnaggar, M.
Ozga, K.
Szota, M.
Alahmed, Z. A.
Alanazi, A. Q.
Alshahrani, H.
Alfaifi, E.
Djouadi, M. A.
Labis, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/355190.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
oxide materials
solid state alloys
structural phase transition
X-ray diffraction
scanning electron microscopy
Opis:
We have discovered a structural transition for the SrZnO alloy films from a wurtzite to a rock-salt structure, leading to a reduction in the (112̲0)/(0001) surface energy ratio. The films were grown by pulsed laser deposition using different SrO ratios, x. We have revealed that growth at a higher temperature, 750°C, resulted in a sharp 0002 peak at a low SrO content (5%), whereas growth at a higher SrO content (10%) resulted in a non-crystalline film with minute crystallites with a (112̲0) orientation. Generally the crystallinity decreased as the SrO content increased. No results obtained for the crystalline films showed any orientation of significant peaks besides the peak attributed to the (0001) plane, suggesting epitaxial growth. Optical measurements showed difference in transmission widows of alloys with different SrO percentage, and this was correlated to SrO influence on growth mode as indicated by scanning electron imaging. The studied SrZnO films, with SrO/(SrO + ZnO) ≤ 0.25, were grown by pulsed laser deposition using different SrO ratios, x. The effects of temperature and oxygen pressure during growth on the films’ structural properties were investigated. XRD results indicate that the film crystallinity was improved as the temperature and O2 pressure increased up to 650°C and 0.5 Torr, respectively.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 1; 211-216
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrasonic-assisted synthesis of reactive carboxymethyl cellulose stabilized nano zero-valent iron and its application for removal of Cr6+ and Cu2+ ions
Autorzy:
Ayob, A.
Santiagoo, R.
Amneera, W. A.
Ismail, N.
Abdullah, A. Z.
Powiązania:
https://bibliotekanauki.pl/articles/207403.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
high resolution transmission
electron microscopy
light scattering
transmission electron microscopy X ray diffraction
zero-valent iron
wysoka rozdzielczość transmisyjna
mikroskopia elektronowa
dyfrakcja rentgenowska
żelazo
Opis:
Carboxymethyl cellulose (CMC) was used in the chemical reduction using sodium borohydride to yield dispersive nano zero-valent iron (nZVI) particles as reactive and stable adsorbents. CMC- -stabilized nZVI particles were characterized via UV-visible light spectroscopy, X-ray diffraction, dynamic light scattering, transmission electron microscopy, and specific surface area assisted using a probe ultrasonication dispersing tool at 50% amplitude power. High catalytic reactivity obtained in pseudo-first order reaction for Cr6+ (rate constant K1 = 0.0311 min–1) and pseudo-second order for Cu2+ (rate constant K2 = 0.0946 g·mg–1·min–1) indicated that colloidal stability of nZVI particles can be achieved with a stabilizer for the removal of toxic contaminants.
Źródło:
Environment Protection Engineering; 2016, 42, 2; 55-79
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Investigation of Ground Granulated Blast Furnace Slag Geopolymer at High Temperature by Using Electron Backscatter Diffraction Analysis
Autorzy:
Aziz, Ikmal Hakem
Mohd Mustafa Al Bakri, Abdullah
Salleh, Mohd Arif Anuar Mohd
Yoriya, Sorachon
Rafiza, Abd Razak
Mohamed, Rosnita
Baltatu, Madalina Simona
Powiązania:
https://bibliotekanauki.pl/articles/2048835.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
geopolymer
ground granulated blast furnace slag
electron backscatter diffraction
Opis:
This paper elucidated the potential of electron backscatter diffraction analysis for ground granulated blast furnace slag geopolymers at 1000°C heating temperature. The specimen was prepared through the mechanical ground with sandpaper and diamond pad before polished with diamond suspension. By using advanced technique electron backscatter diffraction, the microstructure analysis and elemental distribution were mapped. The details on the crystalline minerals, including gehlenite, mayenite, tobermorite and calcite were easily traced. Moreover, the experimental Kikuchi diffraction patterns were utilized to generate a self-consistent reference for the electron backscatter diffraction pattern matching. From the electron backscatter diffraction, the locally varying crystal orientation in slag geopolymers sample of monoclinic crystal observed in hedenbergite, orthorhombic crystal in tobermorite and hexagonal crystal in calcite at 1000°C heating temperature.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 1; 227-231
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization Of An Equal Channel Angular Pressed Al-Zn-In Alloy
Charakterytyka stopu Al-Zn-In otrzymanego metodą przeciskania w kanale kątowym
Autorzy:
Banjongprasert, C.
Jak-Ra, A.
Domrong, C.
Patakham, U.
Pongsaksawad, W.
Chairuangsri, T.
Powiązania:
https://bibliotekanauki.pl/articles/352220.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloys
equal channel angular pressing
severe plastic deformation
electron backscatter diffraction
stopy aluminium
przeciskanie przez kanał kątowy
odkształcenie plastyczne duże
dyfrakcja elektronów wstecznie rozproszonych
Opis:
Equal channel angular pressing (ECAP) is a technique that creates a high accumulated strain in metals and results in ultrafine-grained structure. In this study, Al-5Zn-0.02In was processed by ECAP at a room temperature using route Bc through an ECAP die (press angle of Φ = 100° and Ψ = 20°). The samples were subjected to ECAP with 1, 2, 3 and 4 passes. The processed specimens were characterized using electron backscatter diffraction (EBSD). The results confirmed the grain refinement of the alloy after ECAP to an average grain size less than 5 μm after 4-pass ECAP. The microhardness test shows that the hardness increased with the number of passes. The hardness of the cross-sectional area of the sample was similar to that tested along the pressing direction.
Metoda przeciskania w kanale kątowym (ang. Equal channel angular pressing; ECAP) prowadzi do powstania bardzo wysokich naprężeń, w wyniku czego otrzymuje się ziarna o bardzo drobnej strukturze. W niniejszej pracy, stop Al-5Zn-0,02In wytwarzano metodą ECAP w temperaturze pokojowej, wykorzystując ścieżkę Bc przez matrycę ECAP (kąty krzywizny: Φ = 100° i Ψ = 20°). Próbki poddano ECAP z 1, 2, 3 i 4 przejściami. Otrzymane próbki badano metodą dyfrakcji elektronów wstecznie rozproszonych (ang. electron back scatter diffraction; EBSD). W stopie otrzymanym metodą ECAP z 4 przejściami, średnia wielkość ziaren wynosiła mniej niż 5 μm. Badania mikrotwardości wykazały, że twardość zwiększała się wraz z liczbą przejść. Twardość zmierzona w poprzek próbki byłą porównywalna do tej mierzonej wzdłuż osi nacisku.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 2A; 887-890
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Znaczenie i przykłady zastosowania banków pseudoatomów asferycznych w krystalografii małych cząsteczek i ich potencjalne wykorzystanie w krystalografii makromolekuł
The importance and examples of application of aspherical pseudoatom databanks in small-molecule crystallography and their potential use in makromolecular crystallography
Autorzy:
Dominiak, P. M.
Powiązania:
https://bibliotekanauki.pl/articles/171730.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
asferyczne atomowe czynniki rozpraszania
gęstość elektronowa
rentgenowskie dane dyfrakcyjne
struktura krystaliczna
aspherical atomic scattering factors
electron density
X-ray diffraction data
crystal structure
Opis:
X-rays are diffracted by the electron density of crystals. Thus, the correct analysis of a single crystal X-ray diffraction pattern can provide information about the distribution of the electron density. How precise and accurate the information could be is largely determined by the resolution of the data collected. The majority of X-ray diffraction data is collected at and below the standard resolution, dmin= 0.84 Å. Before the development of pseudoatom databases, such resolution permitted to carry out X-ray refinement only with the use of simple model of electron density called the Independent Atom Model (IAM). In the IAM, individual atoms are represented by the spherically averaged electron density distributions obtained by theoretical methods for isolated atoms in the ground state. The IAM does not take into account changes in the density distribution of individual atoms caused by such phenomena as chemical bond formation, charge transfer, lone electron pairs, etc. Only the geometrical information of the crystal structure is obtained from the IAM refinement. A more physical model has been introduced in which an atom is represented as a finite spherical harmonic expansion of the electron density around each atomic center and is called a pseudoatom. Such definition allows the pseudoatom electron density to be individually adjusted (by changing values of pseudoatom parameters) to account for density departure from spherical and neutral model. However, to refine pseudoatom parameters with experimental data subatomic resolution is required. It has been shown that the values of pseudoatom parameters are almost identical for atoms in similar chemical environments, i.e. atoms having similar local topology of connecting chemical bonds. Therefore it was possible to build a databank of different types of pseudoatoms and to use the bank to generate the Transferable Aspherical Atom Model (TAAM) for any organic molecule, including proteins and nucleic acids. There are three different pseudoatom databanks being developed: ELMAM2, GID and UBDB. They differ by the source of pseudoatom parameters and by the way how atom types are defined. Replacement of the IAM model by the TAAM in the refinement procedure of standard diffraction data leads to more accurate geometrical information and provide access to quantitative estimation of the electron density distribution and properties derived from it (dipole moment, electrostatic potential, etc.) for molecules in a crystalline environment. The review summarizes the research on the verification and application of pseudoatom databases.
Źródło:
Wiadomości Chemiczne; 2014, 68, 5-6; 429-455
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vlijanie mekhaoaktivacii dobavki mikrokremnezema na struktury i svojjstva pressovannykh materialov iz granodioritovykh shlamov sharkinskogo karera
Effect of mechanical activation supplements and fume on the structure and properties the compact granodiorite of sludge sharhinskogo career
Autorzy:
El'kina, I.
Powiązania:
https://bibliotekanauki.pl/articles/76830.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
mechanical activity
sludge
granodiorite rock
structure
property
pressing
X-ray diffraction
electron microscopy
Opis:
The influence of mechanical activation process and silica fume addition to the compressed samples from sludge granodiorite rocks studied the formation of structure and properties the material. Spotted an opportunity to obtain high-quality wall materials based on recycled materials
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 5
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmentally hazard and toxic exoskeletons of marine crustaceans wastes in synthesizing N-deacetylated chitin
Zastosowanie niebezpiecznych i toksycznych dla środowiska egzoszkieletów skorupiaków morskich w syntezie N-deacetylowanej chityny
Autorzy:
El-Mekawy, Rasha E.
Powiązania:
https://bibliotekanauki.pl/articles/2202580.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
chitosan
shrimp shells
scanning electron microscopy
thermal gravimetric analysis
X-ray
diffraction
chitozan
skorupki krewetek
skaningowa mikroskopia elektronowa
analiza termograwimetryczna
dyfrakcja rentgenowska
Opis:
High molecular weight chitosan was synthesized from shrimp shells. Chemical structure of chitosan was confirmed using FT-IR, XRD, TGA, and SEM analyses. Physicochemical properties of chitosan such as molecular weight (800 000 g/mol), deacetylation degree (80%), ash content (1%) indicating effectiveness of demineralization step in removing minerals, water binding capacity (4220%), and fat binding capacity (537%), were determined. FT-IR spectra exhibited characteristic joint band at 3365 cm-1 due to –OH and –NH2 regarding to the conversion of chitin acetyl group to NH2 of chitosan.
Z muszli krewetek zsyntetyzowano chitozan o wysokiej masie cząsteczkowej. Strukturę chemiczną chitozanu potwierdzono metodami FT-IR, XRD, TGA i SEM. Określono właściwości fizykochemiczne chitozanu takie jak masa cząsteczkowa (800 000 g/mol), stopień deacetylacji (80%), wskazu jącą na skuteczność procesu demineralizacji zawartość popiołów (1%), zdolność wiązania wody (4220%) i zdolność wiązania tłuszczu (537%). Widma FT-IR wykazały charakterystyczne pasmo przy liczbie falowej 3365 cm-1, pochodzące od grup –OH i–NH2, wynikające z przekształcenia grupy acetylowej chityny w NH2 chitozanu.
Źródło:
Polimery; 2022, 67, 10; 503--508
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Infrared studies and spectral properties of photochromic high silica glasses
Autorzy:
Girsova, M A
Golovina, G F
Drozdova, I.A.
Polyakova, I G
Antropova, T V
Powiązania:
https://bibliotekanauki.pl/articles/174765.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
silica porous glass
photochromic high silica glass
transmission electron microscopy TEM
X-ray diffraction (XRD)
UV–VIS–IR transmission spectra
Opis:
The structure of photochromic high silica glasses (PHSGs) was studied by UV–VIS–NIR and IR spectroscopy, transmission electron microscopy (TEM) and X-ray diffraction (XRD) techniques. PHSG plates were obtained by impregnation of silica porous glasses at first with AgNO3 aqueous solution (in or without the presence of the sensitizers, such as Cu(NO3)2 or Ce(NO3)3), next in the mixed halide salt (NH4Cl, KBr, KI) solution. Then a part of the samples was sintered at temperatures from 850 to 900 °C up to closing of the pores. The results of TEM study have shown that the PHSG plates have two-phase structure with inclusions of the size of 10–100 nm. According to XRD data, the PHSGs contain the AgBr phase. IR spectra confirmed the presence of AgI, AgCl, CeO2, CuCl2, CuCl phases in PHSGs.
Źródło:
Optica Applicata; 2014, 44, 2; 337-344
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Destruction Mechanism of Z10400 Zn-based Alloy Subjected to Cavitational Erosion
Autorzy:
Jasionowski, R.
Zasada, D.
Polkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/380734.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
zinc alloy
cavitation wear
Electron Backscattered Diffraction (EBSD)
stop cynku
zużycie kawitacyjne
dyfrakcja elektronów wstecznie rozproszonych
Opis:
Z10400 zinc-based alloy has a very good casting properties and high resistance to corrosion. These two advantages make that Z10400 zinc-based alloy is commonly used for cathodic protection of hulls of ships. Cathodic anodes made of Z10400 zinc-based alloy in the propeller and flap rudder areas are also additionally exposed to the cavitation erosion. The aim of this work was to determine the cavitation erosion resistance of Z10400 zinc-based alloy, which is applied as protectors in cathodic protection of hulls of ships. The examination of cavitational erosion was carried out on a jet-impact measuring device. Study of the mechanism of the destruction of Z10400 alloy based on analysis was performed with scanning electron microscope Quanta 3d FEG and electron back scattered diffraction (EBSD) method.
Źródło:
Archives of Foundry Engineering; 2013, 13, 2 spec.; 48-52
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EBSD Strain Analysis of CuZn10 Alloy in As-cast State and After Plastic Working and Annealing During Cavitational Wear
Autorzy:
Jasionowski, R.
Zasada, D.
Polkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/381392.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Electron Backscattered Diffraction (EBSD)
cavitation wear
strain analysis
dyfrakcja elektronów wstecznie rozproszonych
zużycie kawitacyjne
analiza odkształceń
Opis:
Electron backscatter diffraction (EBSD) system in conjunction with scanning electron microscope (SEM) allows performing full material characterization which include analysis of individual grain orientations, crystal orientation, global and local texture, phase identification and distribution or microstrain mapping. EBSD technique may be also applied for assessing lattice strain introduced during local plastic deformation due to its close relationship with development of dislocation substructure. The aim of this study was analysis of surface deformation by EBSD method of CuZn10 alloy in as-cast state and after plastic working and annealing, with different grain size at the beginning of the cavitation destruction process. The local changes of plastic deformation inside each grain were expressed by Grain Orientation Spread (GOS) and Kernel Average Misorientation (KAM) parameters.
Źródło:
Archives of Foundry Engineering; 2013, 13, 2 spec.; 53-60
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Crystalographic Texture on Cavitation Wear Resistance of As-Cast CuZn10 Alloy
Autorzy:
Jasionowski, R.
Polkowski, W.
Zasada, D.
Powiązania:
https://bibliotekanauki.pl/articles/355595.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
texture
cavitation
cavitation erosion
electron backscatter diffraction
EBSD
CuZn10 alloy
Opis:
Analysis of a crystallographic texture (a preferred orientation) effect on cavitation wear resistance of the as-cast CuZn10 alloy, has been conducted in the present paper. The experiment was conducted on the CuZn10 alloy samples with <101>//ND or <111>//ND preferred orientations (where the ND denotes direction that is perpendicular to the exposed surface). The cavitation resistance examinations have been carried out on three different laboratory stands (namely, vibration, jet-impact and flow stands) that are characterized by a various intensity and a way of cavitation’s excitement. Obtained results point towards a higher cavitation resistance of the CuZn10 alloy with the <111>//ND preferred orientation.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 935-940
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of aluminum content on the microstructure and cavitation wear of feal intermetallic alloys
Autorzy:
Jasionowski, R.
Zasada, D.
Polkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/386821.pdf
Data publikacji:
2014
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
intermetallic alloys
cavitation
cavitation wear
Electron Backscattered Diffraction (EBSD)
stopy międzymetaliczne
kawitacja
EBSD
Opis:
Intermetallic-based alloys (so called intermetallics) of the Fe-Al binary system are modern construction materials, which in re- cent decades have found application in many branches of the power, chemical and automotive industries. High resistance of FeAl based alloys to cavitational erosion results first of all from their high hardness in the as-cast state, large compressive stresses in the material, as well as homogeneous structure. In the present paper, the effect of aluminum content on the microstructure, texture and strain imple- mented upon cavitation wear of FeAl intermetallic alloys, have been analyzed by field emission gun scanning electron microscopy (FEG SEM) and electron backscatter diffraction (EBSD) analysis. Obtained results of structural characterization indicates that with increasing aluminium content effects of orientation randomization (weakening of <100>//ND casting texture), grain refinement and rising of mechani- cal strenght (and so cavitational resistance) take place.
Źródło:
Acta Mechanica et Automatica; 2014, 8, 1; 49-52
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Change In Microstructure and Mechanical Properties Of Four-Layer Stack ARB Processed Complex Aluminum Sheet with Annealing
Autorzy:
Jo, Sang-Hyeon
Lee, Seong-Hee
Powiązania:
https://bibliotekanauki.pl/articles/2049296.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
accumulative roll bonding
heterogeneous microstructure
aluminum alloy
electron back scatter diffraction
annealing
Opis:
The four-layer stack accumulative roll bonding (ARB) process using AA1050, AA5052 and AA6061 alloy sheets is performed up to 2 cycles without a lubricant at room temperature. The sample fabricated by the ARB is a multi-layer complex aluminum alloy sheet in which the AA1050, AA5052 and AA6061 alloys are alternately stacked to each other. The changes of microstructure and mechanical properties with annealing for the-ARBed aluminum sheet are investigated in detail. The as-ARBed sheet shows an ultrafine grained structure, however the grain diameter is some different depending on the kind of aluminum alloys. The complex aluminum alloy still shows ultrafine structure up to annealing temperature of 250℃, but above 275℃ it exhibits a heterogeneous structure containing both the ultrafine grains and the coarse grains due to an occurrence of discontinuous recrystallization. This change in microstructure with annealing also has an effect on the change of the mechanical properties of the sample. Especially, the specimen annealed at 300℃ represents abnormal values for the strength coefficient K and work hardening exponent n value.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 3; 765-770
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in Structure of CuCr0.6 Alloy After Repetitive Corrugation Process
Autorzy:
Jung, T.
Kwaśny, W.
Rdzawski, Z.
Głuchowski, W.
Matus, K.
Pawlyta, M.
Szindler, M.
Powiązania:
https://bibliotekanauki.pl/articles/356417.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
CuCr0.6 alloy
severe plastic deformation
repetitive corrugation and straightening
electron backscatter diffraction
transmission electron microscopy
Opis:
This paper presents the study of repetitive corrugation process influence on the strengthening of annealed alloy. Based on the results of mechanical properties of deformed sample, it has been found that the microhardness, ultimate tensile strength, yield strength and apparent elastic limit are significantly increased in relation to annealed sample. Examination on transmission electron microscopy confirmed the effect of intensive plastic deformation on structure fragmentation in the nanometric scale. This work confirmed the possibility of using the repetitive corrugation process to increase mechanical properties of CuCr0.6 alloy.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 4; 2441-2448
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 35

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