Study on the Residual Stress of LY12 Welded Component

Abstract:

In this paper, the distribution law of residual stress normal to the welding joint in LY12 aluminum alloy was measured by the combination use of hole drilling and electrical-measurement method. The experimental results indicated that it was an effective way to measure the residual stress of LY12 aluminum alloy with thickness of 6 mm by applying hole drilling. The distribution of residual stress vertical to welding joint is quite obvious. The residual stress increases as the distance away from the welding joint decreases. The value of the longitudinal residual stress is higher than that of the transverse residual stress. But they are all smaller than the value of ultimate stress in LY12 aluminum alloy. The heat treatment after welding can greatly improve the tensile strength of the weldment.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 2114-2117
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.2114
• Online since: December 2012
• Authors: Feng Xia, Jian Ping Li, Gao Hong Li, Man Zhu
• Keywords: Aluminium Alloy, Hole Drilling and Electrical-Measurement Method, Residual Stress, Welding

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