通过数字图像相关技术揭示在TRIP增强块体金属玻璃复合材料中可变形颗粒的局部剪切应变分配的作用

袁小园; 吴渊; 刘雄军; 王辉; 蒋虽合; 吕昭平

doi:10.1007/s12613-022-2460-1

Volume 29 Issue 4

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(4): 807-813

Xiaoyuan Yuan, Yuan Wu, Xiongjun Liu, Hui Wang, Suihe Jiang, and Zhaoping Lü, Revealing the role of local shear strain partition of transformable particles in a TRIP-reinforced bulk metallic glass composite via digital image correlation, Int. J. Miner. Metall. Mater., 29(2022), No. 4, pp. 807-813. https://doi.org/10.1007/s12613-022-2460-1

Cite this article as:

Xiaoyuan Yuan, Yuan Wu, Xiongjun Liu, Hui Wang, Suihe Jiang, and Zhaoping Lü, Revealing the role of local shear strain partition of transformable particles in a TRIP-reinforced bulk metallic glass composite via digital image correlation, Int. J. Miner. Metall. Mater., 29(2022), No. 4, pp. 807-813. https://doi.org/10.1007/s12613-022-2460-1

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研究论文

通过数字图像相关技术揭示在TRIP增强块体金属玻璃复合材料中可变形颗粒的局部剪切应变分配的作用

北京科技大学新金属材料国家重点实验室，北京材料基因工程高精尖创新中心，北京 100083，中国

通讯作者:
吴渊 E-mail: wuyuan@ustb.edu.cn

文章亮点

(1) 本文将数字图像相关（DIC）技术应用到对非晶复合材料变形过程的动态研究。

(2) 系统及动态地研究了TRIP增强块体金属玻璃复合材料在变形过程中局部应变的演变及分配的过程。

(3) 结合应变的动态演变，系统总结了可变形颗粒的局部剪切应变分配对块体金属玻璃复合材料的加工硬化和塑性提升的作用。

中文摘要

采用数字图像相关（digital image correlation, DIC）技术研究了形变诱导塑性（transformation-induced plasticity, TRIP）增强的块体金属玻璃（bulk metallic glass, BMG）复合材料中亚稳奥氏体晶相与非晶基体在压缩载荷下的耦合效应。通过DIC的动态记录的特性，直接监测了晶体相和非晶态基体中局部应变场的演化。通过对局部应变场的分析和计算，揭示了亚稳态奥氏体相变对TRIP增强BMG复合材料的贡献。在变形过程中，亚稳态奥氏体优先于非晶基体相变形，且应力导致的亚稳态奥氏体的马氏体相变能有效地消耗局部剪切应变，使晶体相和非晶相的界面处的局部应变/应力集中得到缓解，延缓了变形过程中界面处裂纹的萌生和拓展，从而大大提高了TRIP增强BMG复合材料的塑性和加工硬化能力。我们的研究有助于深入理解变形过程中非晶基体和亚稳晶体相之间的相互作用机制，为进一步提升BMG复合材料的性能设计提供依据。

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Research Article

Revealing the role of local shear strain partition of transformable particles in a TRIP-reinforced bulk metallic glass composite via digital image correlation

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Abstract

Abstract

The coupling effects of the metastable austenitic phase and the amorphous matrix in a transformation-induced plasticity (TRIP)-reinforced bulk metallic glass (BMG) composite under compressive loading were investigated by employing the digital image correlation (DIC) technique. The evolution of local strain field in the crystalline phase and the amorphous matrix was directly monitored, and the contribution from the phase transformation of the metastable austenitic phase was revealed. Local shear strain was found to be effectively consumed by the displacive phase transformation of the metastable austenitic phase, which relaxed the local strain/stress concentration at the interface and thus greatly enhanced the plasticity of the TRIP-reinforced BMG composites. Our current study sheds light on in-depth understanding of the underlying deformation mechanism and the interplay between the amorphous matrix and the metastable crystalline phase during deformation, which is helpful for design of advanced BMG composites with further improved properties.
- bulk metallic glass composite;
- transformation-induced plasticity;
- digital image correlation;
- local shear strain

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