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Analysing single twinning events in Mg-6Zn using nanoindentation
Journal of Alloys and Compounds ( IF 6.2 ) Pub Date : 2018-11-01 , DOI: 10.1016/j.jallcom.2018.07.033
Tingting Guo , Qi Chao , Filip Siska , Jun Cheng , Rameshkumar Ramkaran Varma , Matthew R. Barnett

Abstract The present work addresses the challenge of estimating the twin thickening stresses. Single twinning events were captured in solution treated and peak-aged Mg-6Zn alloy subjected to {10 1 ¯ 0} nanoindentation. Markedly different responses of twinning to aging are seen compared to slip. 3D EBSD and high resolution EBSD are combined with crystal plasticity finite element modelling to fully characterize the twinning event. A model is then derived to allow us to estimate the influence of alloying with Zn and peak aging on the stresses required for twin thickening using the depth of the pop-in and the nanoindentation hardness before twinning. The stress for twin thickening increases from 6 MPa to 26 MPa and 74 MPa with an error of ± 10% due to the addition of solute Zn and the presence of particles formed during peak aging respectively.

中文翻译:

使用纳米压痕分析 Mg-6Zn 中的单孪晶事件

摘要 目前的工作解决了估计孪生增厚应力的挑战。在经过 {10 1 ¯ 0} 纳米压痕的固溶处理和峰时效 Mg-6Zn 合金中捕获了单孪晶事件。与滑动相比,孪生对老化的反应明显不同。3D EBSD 和高分辨率 EBSD 与晶体塑性有限元建模相结合,以充分表征孪生事件。然后推导出一个模型,使我们能够估计锌合金化和峰值时效对孪晶增厚所需应力的影响,使用孪晶的深度和孪晶前的纳米压痕硬度。由于溶质 Zn 的添加和峰值时效期间形成的颗粒的存在,孪生增稠的应力从 6 MPa 增加到 26 MPa 和 74 MPa,误差为 ± 10%。
更新日期:2018-11-01
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