Ti-6Al-4V三元合金焊接熔池凝固组织模拟

doi:10.11896/cldb.19080181

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Abstract Based on the binary alloy cellular automaton model, combined with the thermodynamic phase equilibrium software, a ternary alloy cellular automaton model was proposed. The stability of the model was verified. The morphology of dendritic growth, the distribution of solute concentration and the effect of disturbance amplitude on dendritic growth during solidification of the welding pool of Ti-6Al-4V ternary alloy were simulated. And carried out metallographic experiments to verify. The results show that the model is stable and can realize the numerical simulation of solidification process in the weld pool of ternary alloy, and the preferred growth of dendrite in the weld pool is remarkable and there is grain boundary segregation. The concentration distribution of Al and V in the liquid phase is approximately the same. As the amplitude of the disturbance increases, the number of dendrites in the molten pool increases gradually, the distance between the dendrite arms decreases, and the competitive growth further strengthens. The simulation results are basically consistent with the experimental results.

Key words： ternary alloy cellular automaton welding pool dendritic morphology solute concentration

Published: 10 May 2021

CLC number:

TG401

Fund:National Natural Science Foundation of China (51974243), Natural Science Foundation of Shaanxi Provincial Department (2019JZ-31), Xi'an Municipal Science and Technology Planning Project (201805037YD15CG21(16)).

About author:: Min Zhang, is a professor and doctoral supervisor of Xi'an University of Technology. After graduating from Xi'an Jiaotong University in 1997, he has worked in Xi'an University of Technology. It is mainly engaged in the mechanical behavior and structural quality control of welding forming process, the microstructure evolution behavior of welding solidification process and its advanced welding materials. Currently, he is vice chairman and deputy secretary-general of Shaanxi welding society and chairman of Xi'an welding society. He has won two awards for scientific and technological progress of Shaanxi Provincial Department of Education and two awards for scientific and technological progress in Shaanxi Province. More than 100 papers have been published.

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	ZHANG Min
	GUO Yufei
	HUANG Chao
	ZHANG Lisheng
	ZHANG Wenhui

Cite this article:

ZHANG Min,GUO Yufei,HUANG Chao, et al. Solidification Microstructure Simulation of Ti-6Al-4V Ternary Alloy Welding Pool[J]. Materials Reports, 2021, 35(8): 8116-8120.

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http://www.mater-rep.com/EN/10.11896/cldb.19080181 OR http://www.mater-rep.com/EN/Y2021/V35/I8/8116

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