Interdiffusion in β Phase of the Ternary Ti-Al-V System

被引：2

作者：

Takahashi, Tomoshi ^{[1
]}

Minamino, Yoritoshi ^{[2
]}

Komatsu, Masao ^{[3
]}

机构：

[1] Niihama Natl Coll Technol, Dept Environm Mat Engn, Inst Niihama, Niihama, Ehime 7928580, Japan

[2] Osaka Univ, Grad Sch Engn, Dept Adapt Machine Syst, Suita, Osaka 5650871, Japan

[3] Hiroshima Inst Technologv, Dept Mech Engn, Hiroshima 7315193, Japan

来源：

JOURNAL OF THE JAPAN INSTITUTE OF METALS | 2008年 / 72卷 / 12期

关键词：

titanium-aluminum-vanadium alloy; ternary diffusion; diffusion couple; thermodynamic interaction;

D O I：

10.2320/jinstmet.72.1044

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The interdiffusion in Ti-rich beta Ti-Al-V alloys has been investigated in the temperature range from 1323 to 1473 K. The direct interdiffusion coefficients, (D) over tilde (Ti)(AlAl) and (D) over tilde (Ti)(VV), and indirect interdiffusion coefficients, (D) over tilde (Ti)(AlV) and (D) over tilde (Ti)(VAl), are positive in the ternary alloys, and these four interdiffusion coefficients have slight concentration dependence. The values of (D) over tilde (Ti)(AlAl) are larger than those of (D) over tilde (Ti)(VV), and the values of (D) over tilde (Ti)(AlV) are also larger than those (D) over tilde (Ti)(VAl). The repulsive interactions exist between Al and V atoms in the Ti-Al-V alloys, because the ratio values of indirect coefficient to direct one are positive. On the other hand, the interactions between Ti (solvent) and Al (or V) atoms are attractive in the present alloy, since the ratio of converted interdiffusion coefficients in the ternary alloys shows negative values.

引用

页码：1044 / 1051

页数：8

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