期刊
MATERIALS LETTERS
卷 255, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.matlet.2019.126503
关键词
Al-Mg-Si alloy; Sheet profiles; Superplasticity; Ultrafine-grained microstructure; Phase transformation
资金
- SPbU through Lot 3 Applied [26130576]
In this study the ultrafine-grained aluminum alloy 6061 of the Al-Mg-Si system with a grain size of 350 nm and a regulated distribution of the secondary hardening phase Mg2Si, processed by equalchannel angular pressing in parallel channels (ECAP-PC), was investigated. Under tensile stress at 160...250 degrees C, this ultrafine-grained structure gives rise to signs of superplastic behavior at lower temperature with a total elongation of 240%, the parameter of strain rate sensitivity (m) equals to 0.31. The forming behavior of ultrafine-grained alloy 6061 at room temperature was studied by Eriksen test method, which is a simulation of cold sheet stamping. (C) 2019 Elsevier B.V. All rights reserved.
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