CEC-ICMC 2017 - Abstracts, Timetable and Presentations

Experimental and numerical investigation on residual stress relaxation of 7050 aluminum alloy by cryogenic treatment

11 Jul 2017, 13:00

2h

Exhibit Hall AB

Poster Presentation M2PoB - Materials II: Mechanical Properties, Metals and Non-Metals

Speakers

Mr Zheng Jianpeng (The Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences (TIPCCAS))Prof. Wang Junjie (The Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences (TIPCCAS))

Description

Abstract: The origin of residual stress can be attributed to mechanical process, heat treatment, phase transformation and so on. There are many methods of residual stress release. Compared with heat aging and vibration aging, cryogenic treatment has many advantages in releasing of residual stress. The residual stress relaxation of 7050 aluminum alloy is investigated in the present work. In experiment, different processes of cryogenic treatment were performed on 7050 aluminum alloy. The change of residual stress was tested by blind-hole method and X-ray diffraction method respectively. Numerical simulation of cryogenic treatment process was conducted by finite element method, and the majority of the controlling parameters of cryogenic treatment have been taken into account. The experimental and numerical results show a good correlation.

Key words: Residual stresses; 7050 aluminum alloy; Cryogenic treatment; Finite element model