Extrusion weld seam and mechanical properties of high-strength Mg-Gd-Y-Zn-Mn alloy hollow profile fabricated via porthole die extrusion

被引：5
|
作者：
Wang, Kui [1 ,2 ]
Wang, Xinwei [2 ]
Huang, Song [3 ]
Peng, Xing [4 ]
Dang, Cong [1 ]
Wang, Jinxing [1 ]
Liu, Manping [2 ]
Wang, Jingfeng [1 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China
[2] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[3] Chongqing Special Equipment Inspection & Res Inst, Chongqing 401121, Peoples R China
[4] Southwest Technol & Engn Res Inst, Chongqing 400044, Peoples R China
来源：
VACUUM | 2023年 / 214卷
关键词：
Mg-RE alloys; Hollow profile; Porthole die extrusion; Weld seam; Microstructure; MICROSTRUCTURE; EVOLUTION;
D O I：
10.1016/j.vacuum.2023.112243
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A high-strength Mg-8.8Gd-3.8Y-1.0Zn-0.7Mn (wt%) alloy hollow profile with complex cross-section was successfully fabricated through porthole die extrusion, and its weld seam was analyzed for microstructure and element distribution to investigate the impact of solid-state bonding. The weld seam displayed a homogeneous magnesium grain structure and a precipitation-free zone. The diffusion behavior of alloying elements during solid-state bonding significantly affected the microstructure of the weld seam, with Gd and Y atoms diffusing towards the outside of the weld region. The hollow profile exhibited favorable mechanical properties, with an ultimate tensile strength (UTS) of 470 MPa, a tensile yield strength (TYS) of 309 MPa, and an elongation (EL) of 7.4%, and showed a minor negative effect from the weld seam.
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页数：4
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