Affiliation of Author(s):材料科学与技术学院
Journal:JOURNAL OF ALLOYS AND COMPOUNDS
Key Words:Friction stir lap welding Dissimilar welding Aluminum alloy Nickel based alloy
Abstract:Reports about dissimilar joining of aluminum alloy and nickel base alloy are rare. The friction stir welding (FSW) technique reveals advantages over fusion welding in terms of dissimilar jointing. In the present research, FSW was employed to produce lap joints of aluminum alloy (2A70) and nickel-base alloy (Inconel 600) with various plunge depths (0-0.5 mm) under a given welding and rotation speed (1200 rpm, 40 mm/min). Macrographs were taken and the microstructure of the cross-section of the lap joints was investigated by optical microscopy and scanning electron microscopy. A fine-grained zone was discovered on both sides of the interface. A thin Al3Ni interlayer was generated at the interface. The plunge depth has a vital influence on the joint strength. The lap joint failed at a very low load when the pin did not reach the nickel alloy surface, while the maximum shear strength of the lap joint was obtained under a plunge depth of 0.3 mm and reached 7.9 KN. (C) 2016 Elsevier B.V. All rights reserved.
ISSN No.:0925-8388
Translation or Not:no
Date of Publication:2017-02-25
Co-author:Zheng, Qixian,SHEN Yifu,Huang, Guoqiang,Zhao, Pengcheng
Correspondence Author:FENG Xiaomei