Friction stir welding of Al/Cu pipes and the formation mechanism of intermetallic compounds

JIANG Muyang; CHEN Ke; CHEN Binxi; WANG Min; SHAN Aidang; ZHANG Lanting

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Friction stir welding of Al/Cu pipes and the formation mechanism of intermetallic compounds
Vol. 49, Issue 8, Pages: 1-6(2019)
Published：2019
DOI：
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DOI：

JIANG Muyang, CHEN Ke, CHEN Binxi, et al. Friction stir welding of Al/Cu pipes and the formation mechanism of intermetallic compounds[J]. Eletric Welding Machine2019, 49(8): 1-6. DOI：

摘要

开发了适用于薄管焊接的搅拌摩擦焊接系统

实现了铝/铜薄管的高性能连接。通过在铝/铜焊缝横截面的宏/微观表征发现了5种不同形貌特征的金属间化合物

通过X射线衍射与纳米压痕表征其成分主要为Al

Cu、Al

与少量的AlCu。进一步研究与分析发现

焊接过程中焊缝不同位置的剪切作用与搅拌头压力作用是5种不同形貌成分的金属间化合物的主要形成机制。

Abstract

This work developed a friction-stir-welding system for thin wall pipes and realized high performance Al/Cu pipe joining.Five kinds of intermetallic compounds（IMCs） with different characteristics has been found through macro-/micro-scale observation.The contents of IMCs have been detected to be Al

and AlCu（small amount） through X ray diffraction and nanoindentation.Different shear effect and pressure effect by welding tool were found to be the main formation mechanisms of different kinds of IMCs through further research and analysis.