Short range order and phase separation in Ti-Al alloys

被引：20

作者：

Wood, H ^{[1
]}

Smith, GDW ^{[1
]}

Cerezo, A ^{[1
]}

机构：

[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1998年 / 250卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

short range order; phase separation; Ti-Al alloys;

D O I：

10.1016/S0921-5093(98)00540-1

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The phase decomposition mechanism operating in binary Ti-Al alloys in the two phase alpha + alpha(2) region has been investigated. A Ti-15at.%Al alloy was aged in the range 450-750 degrees C for various time periods. The resulting microstructures were studied by transmission electron microscopy (TEM) and atom probe field ion microscopy (APFIM). Computer simulations of phase separation in this alloy were also carried out using a dynamic Ising model. Results from the computer simulations suggest decomposition occurs via a conditional spinodal route, whereby compositional phase separation is contingent upon prior ordering of the matrix. Experimental studies to date are fully consistent with this mechanism. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：83 / 87

页数：5

共 7 条

[1] MECHANISMS OF PHASE-TRANSFORMATIONS WITHIN MISCIBILITY GAP OF FE-RICH FE-A1 ALLOYS [J].