Welding behavior of friction stir welding of magnesium/aluminum lamellar composite plate

被引：0

作者：

Gao H.-L. ^{[1
]}

Li X.-T. ^{[1
]}

Chen H.-S. ^{[1
]}

Wang W.-X. ^{[2
]}

Chai F. ^{[3
]}

Wang Z.-R. ^{[3
]}

Liu G.-T. ^{[3
]}

机构：

[1] College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan

[2] College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan

[3] CSSC Shanxi Fenxi Heavy Industry Co., Ltd., Taiyuan

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2023年 / 33卷 / 06期

基金：

中国国家自然科学基金;

关键词：

fracture mechanism; friction stir welding; interface connection; intermetallic compound; mechanical properties; Mg/Al lamellar composite plate;

D O I：

10.11817/j.ysxb.1004.0609.2022-43175

中图分类号：

学科分类号：

摘要：

Friction stir welding (FSW) method was used to weld Mg/Al lamellar composite plate prepared by explosive welding method, and the microstructure, phase and mechanical properties of the welded joints were analyzed at different welding speeds. The results show that the forming effect of FSW joint surface of Mg/Al lamellar composite plate is good, and the boundary between thermo mechanical affected zone (TMAZ) and heat affected zone (HAZ) is not obvious. The stir zone (SZ) is distributed with alternating magnesium and aluminum strips and the formation of Al3Mg2 and Mg17Al12 intermetallic compounds in the SZ, the TMAZ and the HAZ. The welding defects are mainly tunnel type defects formed by the metal not filling in time at the interface. The cross section hardness of the welded joints shows a “W” shape distribution, and the hardness of the SZ gradually decreases from aluminum side to interface to magnesium side. The maximum tensile strength of FSW welded joints is 94.5 MPa and the elongation is 6.7%, and the fracture mechanism is brittle fracture of intermetallic compounds and ductile fracture of magnesium/aluminum matrix. © 2023 Central South University of Technology. All rights reserved.

引用

页码：1746 / 1757

页数：11

共 29 条

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