Strain rate and orientation-dependent strain hardening of Mg-9Li-Al using crystal plasticity

被引：0
作者：
Han, M. C. [1 ,2 ]
Sun, C. Y. [1 ,2 ]
Shi, B. [1 ,2 ]
Guo, N. [1 ,2 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mech Engn, Beijing 100083, Peoples R China
[2] Beijing Key Lab Lightweight Met Forming, Beijing, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2018年 / 34卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Duplex alloy; crystal plasticity; finite element model; magnesium-lithium alloy; hardening; GRAIN-SIZE; TEXTURE EVOLUTION; TWIP STEEL; MAGNESIUM ALLOY; FCC METALS; DEFORMATION MECHANISMS; NEUTRON-DIFFRACTION; PRISMATIC SLIP; MG; MODEL;
D O I：
10.1080/02670836.2017.1407541
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A crystal plasticity finite element model was proposed considering slip and twinning interactions. The grain morphology and crystallographic orientations were introduced into the model to describe the microstructure of duplex polycrystalline Mg-9Li-Al. The activation of the slip systems and the strain localisation with respect to initial grain orientations were investigated. In addition, the effects of phase distributions and volume fractions on the macroscopic responses and on strain hardening rates were analysed. The results show that the strain hardening is rate-dependent but the texture is less sensitive to strain rate. The distribution of a phase and its volume fraction play primary roles in governing the mechanical response. [GRAPHICS] .
引用
收藏
页码：440 / 454
页数：15
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