Microstructure and mechanical properties of aluminum 5083 weldments by gas tungsten arc and gas metal arc welding

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:549

Article

Liu, Yao¹  Wang, Wenjing²  Xie, Jijia¹  Sun, Shouguang²  Wang, Liang³  Qian, Ye¹  Meng, Yuan¹  Wei, Yujie¹ 

[1] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China

[2] Beijing Jiaotong Univ, Sch Mech Elect & Control Engn, Beijing 100044, Peoples R China

[3] Chongqing Univ Sci & Technol, Coll Met & Mat Engn, Chongqing 401331, Peoples R China

关键词: Gas tungsten arc welding;    Gas metal arc welding;    Aluminum 5083;    Strength;    Failure;   

DOI  :  10.1016/j.msea.2012.03.108

来源: Elsevier

【 摘 要 】

The mechanical properties and microstructural features of aluminum 5083 (AI5083) weldments processed by gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW) are investigated. Weldments processed by both methods are mechanically softer than the parent material AI5083, and could be potential sites for plastic localization. It is revealed that AI5083 weldments processed by GTAW are mechanical more reliable than those by GMAW. The former bears higher strength, more ductility, and no apparent microstructure defects. Perceivable porosity in weldments by GMAW is found, which could account for the distinct mechanical properties between weldments processed by GTAW and GMAW. It is suggested that caution should be exercised when using GMAW for AI5083 in the high-speed-train industry where such light weight metal is broadly used. (C) 2012 Elsevier B.V. All rights reserved.

【 授权许可】

Free