2219铝合金焊接接头软化模型的建立与应用

doi:10.11896/cldb.19030175

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Abstract The yield strength and tensile strength were obtained through the micro-area tensile test in different regions of 2219 aluminum alloy TIG wel-ding joint and the tensile test at different temperatures of the base material during the thermal cycle. The softening model based on temperature, temperature history and strain strengthening effect was established. The softening model was applied to the finite element simulation of the residual stress of TIG welding joint, and the stress of simulated values and measured values by X-ray diffraction were compared. It was found that, compared with the conventional model, the residual stress distribution based on the softening model decreased variously and the effect was more obvious in the area of both ends and near the weld and the transverse distribution. The distribution of welding residual stress with the softe-ning model is closer to the measured value, which improves the accuracy of welding residual stress calculation and verifies the effectiveness of the softening model.

Key words： 2219 aluminum alloy softening model welding residual stress finite element simulation

Published: 26 April 2020

CLC number:

TG404

Corresponding Authors: Xiaoyan Lireceived his Ph.D. degree in materials from Harbin Institute of Technology in 1992. He has been a professor at Beijing University of Technology since 1998 and a doctoral tutor since 2000. He is mainly engaged in research work on nondestructive testing and evaluation of materials, microelectronic assembly materials and technologies, and information engineering technology. He has published more than 100 papers in important journals at home and abroad.

About author:: Qi Wuis a postgraduate student at Beijing University of Technology. He is mainly engaged in the research of measurement and prediction of welding residual stress.

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	WU Qi
	LI Xiaoyan
	SUN Luyang
	WANG Xiaopeng

Cite this article:

WU Qi,LI Xiaoyan,SUN Luyang, et al. Establishment and Application of Softening Model of 2219 Aluminum Alloy Welding Joint[J]. Materials Reports, 2020, 34(10): 10138-10143.

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http://www.mater-rep.com/EN/10.11896/cldb.19030175 OR http://www.mater-rep.com/EN/Y2020/V34/I10/10138

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