Three-dimensional computational characterization of grain size and texture effects in magnesium alloys
Three-dimensional computational characterization of grain size and texture effects in magnesium alloys
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DOI：
10.1016/j.jma.2023.09.014
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发表时间：
2023-10-01
影响因子：
17.6
通讯作者：
Joshi, Shailendra P.
中科院分区：
文献类型：
--
作者：
Baweja, Shahmeer;Joshi, Shailendra P.
本工作系统地研究了镁合金的组织-性能关系。重点是通过高分辨率的晶体塑性模拟，了解晶粒度和织构如何共同影响材料的强化和硬化、净塑性各向异性和拉伸-压缩不对称性。为此，进行了528个全三维有限元计算，包括11个织构、4个颗粒尺寸、6个加载方向和两种单轴加载状态(拉伸和压缩)。晶粒尺寸效应遵循Hall-Petch关系，该关系同时取决于加载方向和初始织构。晶粒度细化的延伸型孪晶的减少也受织构的影响。在一定的织构强度下，晶粒度细化可显著降低屈服时的净塑性各向异性，用Hill各向异性量化，并降低拉伸-压缩不对称性。从细观力学的角度，预测了晶粒度和织构对材料延性的影响是非单调的。计算预测作为实验验证和降阶模型的合成数据集。(C)2023重庆大学。爱思唯尔公司代表科爱通信有限公司提供的出版服务。这是一篇由重庆大学负责的CC By-NC-ND许可证(http://creativecommons.org/licenses/by-nc-nd/4.0/)同行审查下的开放获取文章
This work systematically investigates the microstructure-property relationship in Mg alloys. Emphasis is placed on understanding, through high resolution crystal plasticity modeling, how grain size and texture collectively impact material strengthening and hardening, net plastic anisotropy, and tension-compression asymmetry. To achieve this, 528 fully three-dimensional finite element calculations are performed, which comprise eleven textures, four grain sizes, six loading orientations, and two uniaxial loading states (tension and compression). The grain size effect follows Hall-Petch relation that depends on both, loading orientation and initial texture. The reduction in extension twinning with grain size refinement is influenced by texture as well. Below a threshold textural strength, grain size refinement leads to an appreciable reduction in the net plastic anisotropy at yield, quantified using Hill anisotropy, and reduced tension-compression asymmetry. Using a micromechanical basis, the effect of grain size and texture on material ductility is predicted to be non-monotonic. The computational predictions serve as synthetic data sets for experimental validation and reduced-order modeling.(c) 2023 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd.This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University