Grain Refinement, Microstructure and Mechanical Properties Homogeneity of Mg-Gd-Y-Nd-Zr Alloy During Multidirectional Forging

被引：19

作者：

Xia, Xiangsheng ^{[1
,2
,3
]}

Wang, Changpeng ^{[1
,3
]}

Wu, Yang ^{[1
]}

Zhang, Kui ^{[2
]}

Ma, Minglong ^{[2
]}

Yuan, Baoguo ^{[4
]}

机构：

[1] Southwest Technol & Engn Res Inst, Chongqing 400039, Peoples R China

[2] GRIMAT Engn Inst Co Ltd, State Key Lab Nonferrous Met & Proc, Beijing 101407, Peoples R China

[3] Collaborat Innovat Ctr Precis Forming Integrated, Chongqing 400039, Peoples R China

[4] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Anhui, Peoples R China

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2018年 / 27卷 / 11期

关键词：

multidirectional forging; magnesium alloys; microstructure homogeneity; mechanical properties; texture; PROCESSING MAP; TEXTURE; EXTRUSION; STRENGTH; ANISOTROPY; BEHAVIOR; SHEETS;

D O I：

10.1007/s11665-018-3687-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Multidirectional forging (MDF) of Mg-Gd-Y-Nd-Zr alloy was performed under decreasing temperature condition. The grain refinement, microstructure and mechanical properties homogeneity of Mg-Gd-Y-Nd-Zr alloy during MDF process were investigated. The results show that the grain refinement mechanism of Mg-Gd-Y-Nd-Zr alloy during MDF process was dynamic recrystallization. The dynamic precipitations were observed after MDF process, which were mainly located at the grain boundaries and had a significant influence on the grain refinement, and the amount of dynamic precipitations increased as the MDF passes increase. The microstructure of the billet was not homogeneous due to the deformation and temperature inhomogeneity during MDF process. Optimization MDF process has been proposed, which benefited the microstructure homogeneity and reduced the amount of the dynamic precipitations. Based on the optimization MDF process, the elongation to fracture significantly increased.

引用

页码：5689 / 5699

页数：11

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