Analysis and modeling of the growth of intermetallic compounds in aluminum-steel joints

doi:10.1039/c7ra06354g

	Analysis and modeling of the growth of intermetallic compounds in aluminum-steel joints
	Zhang, Gang 1; Chen, Manjiao 1; Shi, Yu 1; Huang, Jiankang 1; Yang, Fuqian 2
刊名	RSC Advances
	2017
卷号	7 期号:60 页码:37797-37805
关键词	Binary alloys Brazing Crystal orientation Gas metal arc welding Gas welding Intermetallics Liquids Monte Carlo methods Phase interfaces
ISSN号	2046-2069
DOI	10.1039/c7ra06354g
英文摘要	In this work, we experimentally and numerically studied the microstructures and growth of intermetallic compounds (IMCs) formed in Al-Fe (aluminum-steel) joints welded by a pulsed double electrode gas metal arc welding (DE-GMAW)-brazing method. The IMCs consist of Fe2Al5 and FeAl3, with Fe2Al5 being the main compound in the joints. The thickness of an IMC layer increases with an increase of the welding current (heat input) into the base metal. EBSD measurement suggests that the preferred crystal orientation of the Fe2Al5 IMC likely provides the necessary path for Al atoms to migrate through the IMC layer for further growth of the Fe2Al5 IMC layer toward the steel substrate. The Monte Carlo method was used to simulate growth of the IMCs in the joints. Numerical results are in good accord with the experimental results, suggesting that Fe2Al5 IMC is first formed in the initial brazing interface between liquid Al and steel substrate, and then the interface between the liquid Al and steel substrate evolves into two new interfaces: one is an interface between the Fe2Al5 IMC layer and the steel substrate, and the other is an interface between the Fe2Al5 IMC layer and liquid Al. During growth of the Fe2Al5 IMC, FeAl3 IMC forms in the interface between the Fe2Al5 IMC layer and the Al and then grows into the Al. The thickness of the Fe2Al5 layer increases nonlinearly with an increase in the growth time. © 2017 The Royal Society of Chemistry.
WOS研究方向	Chemistry
语种	英语
出版者	Royal Society of Chemistry
WOS记录号	WOS:000407305200035
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/151321]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.State Key Laboratory of Advanced Processing and Recycling Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Department of Chemical and Materials Engineering, University of Kentucky, Lexington; 40506, United States
推荐引用方式 GB/T 7714	Zhang, Gang,Chen, Manjiao,Shi, Yu,et al. Analysis and modeling of the growth of intermetallic compounds in aluminum-steel joints[J]. RSC Advances,2017,7(60):37797-37805.
APA	Zhang, Gang,Chen, Manjiao,Shi, Yu,Huang, Jiankang,&Yang, Fuqian.(2017).Analysis and modeling of the growth of intermetallic compounds in aluminum-steel joints.RSC Advances,7(60),37797-37805.
MLA	Zhang, Gang,et al."Analysis and modeling of the growth of intermetallic compounds in aluminum-steel joints".RSC Advances 7.60(2017):37797-37805.