Study on contact coefficient of 6061 Al-Alloy using friction stir welding

2018 International Conference on Advanced Materials, Intelligent Manufacturing and Automation

材料科学;机械制造;运输工程

Feng, T.T.^1,2 ; Fan, G.J.^1,2 ; Zhang, H.^1 ; Xu, L.F.^1,2

College of Mechanical and Electrical Engineering, Shandong Agricultural University, Tai'an

271018, China^1

Shandong Provincial Key Laboratory of Horticultural Machinery and Equipment, Tai'an

271018, China^2

关键词: 6061 Al alloy;    Calculation results;    Coefficient of frictions;    Heat-flow couplings;    Pure slip;    Surrounding materials;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/382/2/022086/pdf
DOI  :  10.1088/1757-899X/382/2/022086

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The movement of material around stirring needle has important influence on the friction stir welding process. In this paper, contact coefficient is introduced to describe the movement. When the contact coefficient is 0, the state between stirring needle and the surrounding material is pure slip, the material around stirring needle remains still as the stirring needle rotates. When the contact coefficient is 1, the state between stirring needle and the surrounding material is pure adhesion, and the surrounding material and the stirring needle rotate at the same speed. When the contact coefficient is between 0 and 1, slip and adhesion coexist. In order to determine the contact coefficient of friction stir welding process, this paper establishes a heat flow coupling analysis model of friction stir welding process based on computational fluid dynamics. The results show that when the contact coefficient is set as 0.65, the calculation results are consistent with the experiment.