Microstructures and mechanical behavior of aluminum-copper lap joints

doi:10.1016/j.msea.2017.08.056

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	Microstructures and mechanical behavior of aluminum-copper lap joints
	Zhou, Xianglong 1; Zhang, Gang 1; Shi, Yu 1; Zhu, Ming 1; Yang, Fuqian 2
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2017-09-29
卷号	705 页码:105-113
关键词	Al-Cu joint Microstructure Intermetallic compound Shear strength Brittle fracture
ISSN号	0921-5093
DOI	10.1016/j.msea.2017.08.056
英文摘要	5052 aluminum alloy and pure copper (T2) are joined, using a low heat input pulsed double-electrode gas metal arc welding (DE-GMAW)-brazing method with AlSi12 filler metal. The effects of welding current (heat input) on the microstructure and mechanical behavior of the joints, which consist of Al-Al welding zone and Al-Cu brazing zone, are investigated. The Al-Cu welding zone mainly consists of alpha-Al solid solution and Al-Cu eutectic phase in coral-like shape. There exists a layer of Al2Cu intermetallic compound (IMC) in the Al-Cu brazing zone. Using the theory of thermal activation process, a quadratic relation between the thickness of the IMC layer and welding current intensity is derived. The experimental result supports this relationship. The shear strength of the Al-Cu joints first increases with the increase of the welding current (heat input), reaches a maximum of 17.66 MPa, and then decreases with the increase of the welding current due to the dispersion of the Al2Cu IMCs of large sizes in the Al alloy. Fracture of the Al-Cu lap joints occurs at three different positions, and the corresponding failure mechanisms are discussed according to the morphologies of fracture surfaces.
资助项目	Open Foundation of State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals[SKLAB 0201400802014008]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000413135700014
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33094]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
通讯作者	Shi, Yu; Yang, Fuqian
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA
推荐引用方式 GB/T 7714	Zhou, Xianglong,Zhang, Gang,Shi, Yu,et al. Microstructures and mechanical behavior of aluminum-copper lap joints[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2017,705:105-113.
APA	Zhou, Xianglong,Zhang, Gang,Shi, Yu,Zhu, Ming,&Yang, Fuqian.(2017).Microstructures and mechanical behavior of aluminum-copper lap joints.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,705,105-113.
MLA	Zhou, Xianglong,et al."Microstructures and mechanical behavior of aluminum-copper lap joints".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 705(2017):105-113.