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

页码：358 / 363

页数：6

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