Evolution of wire+arc additive manufactured titanium alloy during solidification process based on CAFE simulation

被引：0
|
作者：
Li H.-Y. [1 ,2 ]
Chen W.-G. [1 ]
Zhang F.-Q. [1 ,2 ]
Gao H.-M. [1 ]
Ren S.-X. [1 ]
机构：
[1] School of Material Science and Engineering, Xi'an University of Technology, Xi'an
[2] Shaanxi Tian Cheng Aerospace Co., LTD., Xianyang
来源：
Chen, Wen-Ge (wgchen001@263.net) | 1775年 / Central South University of Technology卷 / 28期
关键词：
Additive manufacturing; Alloy wire; Arc; CAFE; Crystal growth; Ti6Al4V;
D O I：
10.19476/j.ysxb.1004.0609.2018.09.08
中图分类号：
学科分类号：
摘要：
CAFE model was adopted to simulate the rapid solidification process of wire+arc additive manufactured Ti6Al4V alloy. Moreover, the influences of temperature field on solid-liquid transition as well as the initial I-Ti nucleation and growth in different manufacturing stages were analyzed by three-dimensional mode in different stages (deposition layer), grain nucleation and growth model and three-dimensional heat transferring (including latent heat release) model. The results show that β-Ti crystal has extremely disordered orientation and fine grain size in initial solidification stage (the first layer). Besides, with the increase of manufacturing sample height and the decrease of temperature gradient, both the average mushy zone width and average primary β-Ti grain size increase, and the crystal orientation tends to heat transfer direction (vertical cold-board direction). Final, the results of initial β-Ti crystal growth simulation basically conform to the actual additive manufacturing. © 2018, Science Press. All right reserved.
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页码：1775 / 1783
页数：8
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