对 Mg-Zn-Ca 合金循环变形过程中的微结构演变进行准原位观测

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2024-11-05 DOI:10.1016/j.vacuum.2024.113804

G.H. Cao , H. Wang , C. Qiu , F.S. Meng , Z.J. Deng , D.T. Zhang , D.L. Chen

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引用次数: 0

摘要

采用准原位电子反向散射衍射（EBSD）研究了均质化粗晶粒镁-1.2锌-0.1钙合金在应变振幅为 0.8 % 的循环变形过程中的微观结构演变。晶粒的随机取向和合金的软态导致了对称的滞后环和循环硬化。除了出现孪晶-脱晶现象外，基底<a>/金字塔II<c+a>和金字塔I<a>滑移系统也被激活。错向角较高的晶界（35°）是应变定位的首选位置。

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Quasi-in-situ observations of microstructural evolution during cyclic deformation of a Mg-Zn-Ca alloy

Quasi-in-situ electron backscatter diffraction (EBSD) was employed to investigate the microstructural evolution of a homogenized coarse-grained Mg-1.2Zn-0.1Ca alloy during cyclic deformation at a strain amplitude of 0.8 %. The random orientations of grains along with the soft state of the alloy resulted in symmetrical hysteresis loops and cyclic hardening. Besides the occurrence of twinning-detwinning, basal <a>/pyramidal II <c+a> and pyramidal I <a> slip systems were primarily activated. Grain boundaries with a higher misorientation angle of >35° served as preferential sites for strain localization.

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.