Fe-bearing intermetallics transformation and its influence on the corrosion resistance of Al–Mg–Si alloy weld joints

Journal of Materials Research and Technology

Qing-Yu Zhang¹  Xiao-Nan Wang²  Qi-Peng Dong²  Zhen-Guang Liu³  Xia-Ming Chen³  Hiromi Nagaumi³  Zeng-Rong Hu⁴ 

[1] Corresponding author.;High-Performance Metal Structural Materials Research Institute, Soochow University, Suzhou, 215021, China;School of Iron and Steel, Soochow University, Suzhou, 215021, China;School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212000, China;

关键词: Corrosion behavior;    Fe-bearing intermetallics;    Partially melted zone;    Fusion welding;    Al–Mg–Si alloy;   

DOI  :  

来源: DOAJ

【 摘 要 】

This work investigated the transformation of Fe-bearing intermetallics and its influence on the corrosion behavior of Al–Mg–Si alloy weld joints. The results showed that the size and type of Fe-bearing intermetallics determined the pitting corrosion resistance of weldment regions. The partially melted zone (PMZ) suffered most serious corrosion attack, because of the formation of coarse needle-like β-AlFeSi. The heat-affected zone (HAZ) immediately behind the PMZ (HAZ-Ⅰ) experienced a complete transformation of β-AlFeSi into α-AlFeSi, but in the rest of the HAZ (HAZ-Ⅱ) was not sufficient for this transformation. Therefore, the HAZ-Ⅰ was more resistant to pitting corrosion than HAZ-Ⅱ.

【 授权许可】

Unknown