期刊
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
卷 64-65, 期 -, 页码 42-50出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijsolstr.2015.03.012
关键词
Magnesium; Twinning; Crystal plasticity; Anisotropy; Texture
类别
资金
- State Key Development Program for Basic Research of China [2013CB227900]
- National Natural Science Foundation of China [U1261201, 51101175, 51371203, 51350110332]
- China Council Scholarship [201206420031]
- National Basic Research Program of China [2013CB632204]
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- National Science Foundation of the U.S.A. [CMMI 1235259]
The mechanical anisotropy of hot-rolled Mg alloy AZ31 is investigated both experimentally and numerically. First, five different specimen orientations with tilt angles of alpha = 0 degrees, 30 degrees, 45 degrees, 60 degrees and 90 degrees between the normal direction and longitudinal specimen axis are used to experimentally study the mechanical anisotropy under uniaxial compression. Then, the Elastic Visco-Plastic Self-Consistent (EVPSC) model, with the recently developed Twinning and De-Twinning (TDT) description, is applied to simulate the uniaxial compression tests. It is demonstrated that accounting for the initial texture and calibrating the EVPSCTDT model using in-plane uniaxial tension and compression along the rolling direction permits prediction of the strength anisotropy and strain hardening behavior along all the five orientations, for cases in which the contribution of twinning is dominated, negligible and intermediate. (C) 2015 Elsevier Ltd. All rights reserved.
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