Al-Zn-Mg-Cu合金中Guinier-Preston II区的共格应变

Coherent strain of Guinier-Preston II zone in an Al-Zn-Mg-Cu alloy.

作者信息

Hou Xiaohu, Li Jijun, Liu Fei, Yan Liangming, Bai Pucun

机构信息

College of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot, 010051, China.

College of Science, Inner Mongolia University of Technology, Hohhot, 010051, China.

出版信息

Micron. 2019 Sep;124:102711. doi: 10.1016/j.micron.2019.102711. Epub 2019 Jul 2.

DOI:10.1016/j.micron.2019.102711

PMID:31280006

Abstract

The Guinier-Preston (GP) II zone in an Al-Zn-Mg-Cu alloy was investigated by using a high-resolution electron microscopy (HREM). We used Geometric Phase Analysis (GPA) technique to measure the experimental HREM image and the simulated HREM image to obtain the strain distribution maps. The results show converging strain fields in the GP II zone, and the maximum compressive strain can reach -7.2% and -6.7%, respectively. The distribution of the experimental strain field was in consistence with that of the simulation result. The average strain of the alloy measured using XRD is 0.191%.

摘要

利用高分辨率电子显微镜（HREM）对一种Al-Zn-Mg-Cu合金中的吉尼尔-普雷斯顿（GP）II区进行了研究。我们使用几何相位分析（GPA）技术测量实验性高分辨率电子显微镜图像和模拟高分辨率电子显微镜图像，以获得应变分布图。结果表明，GP II区存在收敛应变场，最大压缩应变分别可达-7.2%和-6.7%。实验应变场的分布与模拟结果一致。使用X射线衍射仪测量的该合金平均应变为0.191%。