Intermetallic Compounds (IMCs) Formation in Al/Mg Dissimilar Alloy Solid State Joining: Experimental Study and Phase Field Modeling

Kuijing Song; Xinquan Liu; Yukai Ji; Yong Wei; Junrui Luo; Fei Liu; Dashuang Liu; Zhihong Zhong

doi:10.1007/s12540-022-01292-8

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자료유형: 학술저널

저자정보: Kuijing Song (Hefei University of Technology) Xinquan Liu (Hefei University of Technology) Yukai Ji (Hefei University of Technology) Yong Wei (Hefei University of Technology) Junrui Luo (Hefei University of Technology) Fei Liu (Hefei University of Technology) Dashuang Liu (Hefei University of Technology) Zhihong Zhong (Hefei University of Technology)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.29 No.4

발행연도: 2023.4

수록면: 1,165 - 1,180 (16page)

DOI: 10.1007/s12540-022-01292-8

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Aluminum/magnesium (Al/Mg) alloys have good metallurgical compatibility as well as similar melting and recrystallizationtemperatures. Therefore, the formation of deleterious IMCs is considered as a major problem in dissimilar Al/Mgalloys joining. In this paper, the metallurgical reaction behavior and atomic diffusion in Al/Mg solid state joining interfaceare studied. Based on the thermodynamic, kinetic and crystallographic characteristics of ordered phase transformation andatomic diffusion database, a phase field calculation framework of the polycrystalline β–Al3Mg2 and γ–Al12Mg17 evolutionis developed. Diffusivity, D and interface mobility, M, which significant kinetic parameters are defined as alloy compositionsand joining conditions dependent. By a series of simulation, it is proved the simulated interdiffusion microstructuralcharacteristics and element distribution across the joining interface are in coincidence with the corresponding experimentaldata. The thermally activated IMC evolution in diffusion bonding is in thermodynamic equilibrium, while accelerated IMCevolution in friction stir welding results from thermomechanically activated D and M. The present study contributes to theunderstanding of interfacial microstructures evolution in solid state joining of dissimilar alloys.

#Intermetallic compound · Solid state joining · Phase–field model · Interdiffusion · Growth kinetics

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