Effects of trace TiB2 on microstructure in cast titanium alloys

被引：9
作者：
Huang, L. G. [1 ,2 ]
Kong, F. T. [1 ]
Chen, Y. Y. [1 ]
Xiao, S. L. [1 ]
Xu, L. J. [1 ]
机构：
[1] Harbin Inst Technol, Natl Key Lab Precis Hot Proc Met, Harbin 150001, Peoples R China
[2] Liaoning Tech Univ, Coll Mat Sci & Engn, Fuxin 123000, Peoples R China
来源：
INTERNATIONAL JOURNAL OF CAST METALS RESEARCH | 2012年 / 25卷 / 06期
关键词：
Titanium alloy; Grain refining; Casting; Microstructure; TiB2; GRAIN-REFINEMENT; MECHANICAL-PROPERTIES; BORON ADDITION; COMPOSITES; MATRIX; TOUGHNESS; BEHAVIOR;
D O I：
10.1179/1743133612Y.0000000044
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Effects of trace TiB2 on solidification microstructure of Ti-6Al-4V alloy were investigated. The result shows that the microstructure of the ingot was refined by the added TiB2. The grain size and a lath size were reduced gradually with the increase in TiB2. The grain size is reduced by about an order of magnitude with an addition of 0.96wt-%TiB2, and the dendrite appears in the ingot. Such a tendency is similar to the change of the microstructure with boron addition. Ti-6Al-4V-B phase diagram and growth restriction factor Q are applied to analyse the influence mechanism of trace TiB2 on the microstructure.
引用
收藏
页码：358 / 363
页数：6
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