Effect of cooling rate on microstructure evolution during α/β heat treatment of TA15 titanium alloy

被引：109

作者：

Zhu, S. ^{[1
]}

Yang, H. ^{[1
]}

Guo, L. G. ^{[1
]}

Fan, X. G. ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2012年 / 70卷

基金：

中国国家自然科学基金;

关键词：

TA15 titanium alloy; Cooling rate; Microstructure; Diffusional growth; Size distribution; MECHANICAL-PROPERTIES; BETA; SIZE;

D O I：

10.1016/j.matchar.2012.05.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The cooling rate has a strong influence on the volume fraction, size and distribution of primary a phase of TA15 titanium alloy, which play a decisive role in the properties of the material. Thus, the purpose of this paper is to quantitatively investigate the effect rules of the cooling rate on the primary a phase of TA15 titanium alloy by the alpha/beta heat treatment experiment and the mathematical modeling based on a diffusion model. The obtained results show that: (1) the final volume fraction and size of the primary a phase both increase due to more growth time of the primary a phase resulting from the decrease of the cooling rate; (2) the growth rate of primary a phase increases with cooling rate because of the larger supersaturation under higher cooling rate, and the growth rate increases first and then decreases at a certain cooling rate; and (3) the final size distribution of the primary a particles becomes more uniform with the decrease of cooling rate. (C) 2012 Elsevier Inc. All rights reserved.

引用

页码：101 / 110

页数：10

共 22 条

[1] DIFFUSION-LIMITED PHASE TRANSFORMATIONS - A COMPARISON AND CRITICAL EVALUATION OF MATHEMATICAL APPROXIMATIONS [J].