Effect of aging on the tensile and creep behavior of a fully lamellar near γ-TiAl alloy

被引：28
作者：
Chen, WR [1 ]
Beddoes, J
Zhao, L
机构：
[1] Natl Res Council Canada, Struct Mat & Prop Lab, Inst Aerosp Res, Ottawa, ON K1A 0R6, Canada
[2] Carleton Univ, Dept Mech & Aerosp Engn, Ottawa, ON K1S 5B6, Canada
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2002年 / 323卷 / 1-2期
关键词：
gamma-TiAl; fully lamellar structure; aging; tensile; creep;
D O I：
10.1016/S0921-5093(01)01391-0
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
An investigation on the effect of aging on the tensile properties and creep behavior of a fully lamellar (FL) Ti 47AI-2Nb-1Mn-0.5W-0.5Mo-0.2Si (at.%) alloy is presented. Aging at intermediate temperatures produces precipitate particles predominantly along alpha(2)/gamma lamellar interfaces or within alpha(2) lamellae. Most of the precipitates are beta-particles with fewer silicides. Aging at intermediate temperatures leads to increased tensile strength as it result of precipitation of beta and silicide particles. In addition, aging yields an increased primary creep resistance but a shortened creep life for the FL structure. The shortened creep life of the aged FL structures could be a result of early decomposition of alpha(2) lamellae during creep. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：306 / 317
页数：12
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