Numerical simulation of titanium alloy ingot solidification structure during VAR process based on three-dimensional CAFE method

Hongchao Kou, Yingjuan Zhang, Pengfei Li, Hong Zhong, Rui Hu, Jinshan Li, Lian Zhou

科研成果: 期刊稿件文章同行评审

25 引用 (Scopus)

摘要

A multiscale three-dimensional (3D) mathematical model has been established for simulating the temperature field, the fluid flow and the solidification structure of Ti-6Al-4V alloy ingot during vacuum arc remelting (VAR) process, which consists of the macroscopic mass, the momentum and energy conservation equations and the macroscale model of the nucleation and growth of grains. On the basis of heat transfer and fluid flow calculation, the 3D solidification structure formation of the ingot during whole VAR process has been obtained. Comparing the simulation result with the experimental observation, a reasonably qualitative agreement is achieved on grain structure and grain growth pattern. In particular, when taking the heat radiation into consideration during the calculation, the columnar grains on the ingot top are predicted well. Furthermore, a sensitivity study of the effect of natural convection on the grain structure has been carried out. The results show that the natural convection has a great influence on columnar-to-equiaxed transition (CET) and grain size, expressing as promoting the CET and refining the grain.

源语言英语
页(从-至)1537-1542
页数6
期刊Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
43
7
DOI
出版状态已出版 - 1 7月 2014

指纹

探究 'Numerical simulation of titanium alloy ingot solidification structure during VAR process based on three-dimensional CAFE method' 的科研主题。它们共同构成独一无二的指纹。

引用此