Integrated Numerical Simulation of Temperature-recrystallization-precipitate- mechanical Property in Friction Stir Lap Welding of Aluminum Alloy

doi:10.3901/JME.2020.06.213

Abstract

Abstract: Moving heat source model is used to calculate the temperature distributions in friction stir lap welding. Precipitate evolution model is then combined to calculate the mean radius and volume fraction of the precipitates. The precipitate volume fraction, obtained from the precipitate evolution model, is combined with Monte Carlo model to simulate the recrystallization with consideration of the precipitate contributions. The obtained grain morphologies are re-built in finite element models, which are used for the crystal plasticity model. The mechanical behavior in the stirring zone is then predicted. The integrated model of temperature- recrystallization-precipitate-mechanical property is then completely established. Three cases of friction stir lap welding, whose parameters are identically the same with the numerical models, are performed in experiments. The comparison of experimental and numerical data can validate the proposed integrated model.

Key words: friction stir welding, lap welding, Monte Carlo model, precipitate calculation, mechanical property

CLC Number:

TG451

ZHANG Zhao, TAN Zhijun, LI Jianyu, YUAN Honglei, LIU Weiwei. Integrated Numerical Simulation of Temperature-recrystallization-precipitate- mechanical Property in Friction Stir Lap Welding of Aluminum Alloy[J]. Journal of Mechanical Engineering, 2020, 56(6): 213-220.

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