Microstructural response to compression deformation of ultrafine-grained aluminum with various microstructures
PBN-AR
Instytucja
Wydział Inżynierii Materiałowej (Politechnika Warszawska)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Materials Science and Engineering A-Structural Materials Properties Microstructure And Processing
ISSN
0921-5093
EISSN
Wydawca
Elsevier S.A.
DOI
Rok publikacji
2019
Numer zeszytu
Strony od-do
1-9
Numer tomu
763
Identyfikator DOI
Liczba arkuszy
0.5
Słowa kluczowe
en
Aluminum
Plastic deformation
Ultrafine-grained materials
Electron backscattered diffraction
Streszczenia
Język
en
Treść
Ultrafine-grained aluminum having a variety of microstructural features such as fibrous grain morphology, strong or random texture and a dominance of low- or high-angle grain boundaries was compressed to 4% of true strain. This made it possible to measure yield strength and begin a microstructure evolution to accommodate an external load. The level of deformation was high enough to provide changes in the microstructure, but relatively low in order to make it possible to determine the deformation mode in grain types recognized in the precompressed condition, before they become unrecognizable. As a next step, a detailed EBSD examination of these samples before and after compression was performed to track those changes. These observations revealed that, in the samples with a fibrous microstructure, the role of particular fibers changes when the grain refinement is more pronounced within them. In the sample with a relatively uniform microstructure and a grain size of below 800 nm, the post-deformation observations indicated there had been significant grain rotations with a blurring of the initial texture. Based on our observations, we can state that the heterogeneity of plastic deformation mechanisms in ultrafine-grained aluminum is dependent on local variations in microstructure – the arrangement of defects and the crystallographic orientation.
Inne
System-identifier
WUT7db6797ee5e74b36a78a7e62fdc129de
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