Formation and Distribution Mechanism of Intermetallic Compounds of Al/Mg Joint with Zn Transition Metal

Qiong Gao; Ke Hong Wang; Heng Ma; Wei Guo Feng

doi:10.4028/www.scientific.net/AMM.597.276

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 597Formation and Distribution Mechanism of...

Formation and Distribution Mechanism of Intermetallic Compounds of Al/Mg Joint with Zn Transition Metal

Abstract:

6061 Al alloy and AZ31B Mg alloy were joined by lapping TIG welding process with Zn transition metal. The formation and distribution mechanism of IMCs of Al/Mg joint, and the relationship of microstructure and mechanical property were discussed. The introduction of Zn transition metal reduces the Mg/Al IMCs effectively. The microstructure in the fusion zone near the Mg substrate composes of three regions. B zone contains of only MgZn₂ IMCs. That is the place of highest micro-hardness in the weld seam. A and C zones characterize with solid solution precipitated on the MgZn₂ basement which can enhance the ductility of Mg/Al joint. This result indicates that increasing the solid solution precipitated on IMCs can improve the mechanical property of Mg/Al joint.

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Periodical:

Applied Mechanics and Materials (Volume 597)

Pages:

276-279

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.597.276

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Online since:

July 2014

Authors:

Qiong Gao, Ke Hong Wang*, Heng Ma, Wei Guo Feng

Keywords:

Intermetallic Compounds (IMCs), Mg/Al Joint, Zn Transition Metal

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