Microstructure and Corrosion Properties of the Plasma-MIG Welded AA5754 Automotive Alloy

作     者：A. Abouarkoub G. E. Thompson X. Zhou G. Scamans 

作者机构：The Libyan Petroleum Institute Tripoli Libya School of Materials The University of Manchester Manchester UK Innoval Technology Limited Banbury UK 

出 版 物：《Journal of Minerals and Materials Characterization and Engineering》 (矿物质和材料特性和工程（英文）)

年 卷 期：2015年第3卷第4期

页      面：318-325页

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：Plasma-MIG Welding AA5754 Microstructure Corrosion Partially Melted Zone 

摘      要：The influence of heating cycles during plasma metal inert gas (MIG) welding on the microstructure and corrosion properties of the AA5754 automotive alloy has been investigated. The high heat input during plasma-MIG welding results in a significant modification in the microstructure of the AA5754 alloy adjacent to the fusion boundaries. As a consequence of partial melting of the Al-Fe-Mn-(Si) intermetallics at the partially melted zone (PMZ) and segregation of the high melting point elements (particularly Fe and Mn) toward the fusion zone, severe galvanic corrosion attacks can be enhanced along the PMZ of the AA5754 weld during exposure to aqueous corrosion environments.