Fabrication and anti-oxidation properties of Al/Ti-6Al-4V bimetallic clad-sheet by multi-pass friction stir welding

Author:

Li Bo12,Shen Yifu2,Luo Lei2,Hu Weiye3

Affiliation:

1. Shanghai Institute of Special Equipment Inspection and Technical Research, Shanghai, P.R. China

2. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, P.R. China

3. Technology Research Institute, China Aerospace Science and Industry Corporation (CASIC), Nanjing Chenguang Group Co., Ltd (NCGC), Nanjing, P.R. China

Abstract

Bimetallic Al/Ti-6Al-4V clad sheets were fabricated via a novel technical route, mainly by multi-pass friction stir lap welding method. Preliminary investigations on process principles, clad-sheet formability, bonding property, and interlayer structure evolutions were performed. The anti-oxidation performance of Al/Ti-6Al-4V specimens was particularly researched, considering our focus on the protection role of exterior Al-cladding. More fully Ti/Al inter-diffusion and phase-stratification occurred within the interlayer after oxidation test. The Ti/Al interlayer forming mechanisms by friction stir lap welding was elucidated.

Publisher

SAGE Publications

Subject

Industrial and Manufacturing Engineering,Mechanical Engineering

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