Influence of Microstructure Evolution on Superplastic Properties of Fine-grained Mg-Y-Nd Alloy

被引：0

作者：

Cao G. ^{[1
]}

Zheng Z. ^{[1
]}

Liu Y. ^{[1
]}

Wang M. ^{[1
]}

Li W. ^{[1
]}

机构：

[1] School of Mechanical and Electronic Engineering, Guangdong Polytechnic Normal University, Guangzhou

来源：

Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2019年 / 33卷 / 06期

关键词：

Friction stir processing; Metallic materials; Mg-Y-Nd alloy; Microstructure; Superplastic deformation;

D O I：

10.11901/1005.3093.2018.506

中图分类号：

学科分类号：

摘要：

Superplastic performance of the submerged friction stir processed Mg-Y-Nd alloy was assessed by initial strain rates in range of 2×10-2 to 4×10-4 s-1 at temperatures in range of 683 to 758 K, aiming to reveal the correlation of the microstructure evolution and the superplastic performance of the alloy. Results show that due to the fine-grained and stable microstructure, the alloy exhibits the maximum elongation of 967% by strain rate of 3×10-3 s-1 at 733 K, and the excellent high strain rate superplasticity of 900% by 2×10-2 s-1 at 758 K respectively. The average size of α-Mg grains and secondary phase particles remarkably increased when the alloy subjected to high temperature tensile tests for long time, as a result, the elongation of the alloy significantly decreased. Cavities easily formed at grain boundaries instead of the interface of secondary particles and matrix, which may be responsible to the good deformation compatibility between particles and matrix. © All right reserved.

引用

页码：452 / 460

页数：8

共 19 条

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