Intermetallic Compounds (IMCs) Formation in Al/Mg Dissimilar Alloy Solid State Joining: Experimental Study and Phase Field Modeling
点击次数：
DOI码：10.1007/s12540-022-01292-8
发表刊物：Metals and Materials International
关键字：Intermetallic compound Solid state joining Phase–field model Interdiffusion Growth kinetics
摘要：Aluminum/magnesium (Al/Mg) alloys have good metallurgical compatibility as well as similar melting and recrystallization temperatures. Therefore, the formation of deleterious IMCs is considered as a major problem in dissimilar Al/Mg alloys joining. In this paper, the metallurgical reaction behavior and atomic diffusion in Al/Mg solid state joining interface are studied. Based on the thermodynamic, kinetic and crystallographic characteristics of ordered phase transformation and atomic diffusion database, a phase field calculation framework of the polycrystalline β–Al3Mg2 and γ–Al12Mg17 evolution is developed. Diffusivity, D and interface mobility, M, which significant kinetic parameters are defined as alloy compositions and joining conditions dependent. By a series of simulation, it is proved the simulated interdiffusion microstructural characteristics and element distribution across the joining interface are in coincidence with the corresponding experimental data. The thermally activated IMC evolution in diffusion bonding is in thermodynamic equilibrium, while accelerated IMC evolution in friction stir welding results from thermomechanically activated D and M. The present study contributes to the understanding of interfacial microstructures evolution in solid state joining of dissimilar alloys.
合写作者：Kuijing Song,Xinquan Liu,Yukai Ji,Yong Wei,Junrui Luo,Fei Liu,Dashuang Liu,Zhihong Zhong
论文类型：期刊论文
学科门类：工学
文献类型：J
期号：29
页面范围：1165-1180
是否译文：否
发表时间：2022-09-10