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On plastic anisotropy and deformation history-driven anelasticity of an extruded magnesium alloy

机译:挤出镁合金的塑性各向异性和变形历史驱动的四组织

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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.
机译:使用原位中子衍射测量和晶体塑性建模,研究了挤出的Mg-9重量%的塑料各向异性和卸载挤出的Mg-9wt。%Al合金(具有两个退火纹理)。 通过不同滑移/孪桃模式的替代操作来解释压缩和拉伸荷载循环期间的独特屈服和硬化行为。 我们揭示了不同取向晶粒的微机械响应强烈取决于其邻近条件和操作变形机制。 基于建模结果,假设卸载气动是通过硬变形模式的塑性贡献和对更容易变形模式的阻力效应来控制。 (c)2019年Acta Materialia Inc.出版By Elsevier Ltd.保留所有权利。

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