標題: On plastic anisotropy and deformation history-driven anelasticity of an extruded magnesium alloy
作者: Wang, Huai
Lee, Soo Yeol
Wang, Huamiao
Woo, Wanchuck
Huang, E-Wen
Jain, Jayant
An, Ke
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: Magnesium alloy;Plastic anisotropy;Anelastic behavior;Deformation mechanism;Crystal plasticity
公開日期: 1-Feb-2020
摘要: The plastic anisotropy and unloading anelasticity of an extruded Mg-9 wt.%Al alloy (with two annealed textures) were investigated using in-situ neutron diffraction measurement and crystal plasticity modelling. The distinctive yielding and hardening behaviors during compressive and tensile loading-unloading cycles were interpreted by the alternative operations of different slip/twinning modes. We reveal that the micromechanical responses of differently-oriented grains strongly depend on their neighboring conditions and operative deformation mechanisms. Based on the modelling results, unloading anelasticity is hypothesized to be controlled by the plastic contribution of the hard deformation mode and its impeding effects on easier deformation modes. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.scriptamat.2019.09.025
http://hdl.handle.net/11536/153154
ISSN: 1359-6462
DOI: 10.1016/j.scriptamat.2019.09.025
期刊: SCRIPTA MATERIALIA
Volume: 176
起始頁: 36
結束頁: 41
Appears in Collections:Articles