Hall-Petch relationship in two-phase TiAl alloys with fully lamellar microstructures

被引：21
|
作者：
Tang, JC [1 ]
Huang, BY [1 ]
He, YH [1 ]
Liu, WS [1 ]
Zhou, KC [1 ]
Wu, AH [1 ]
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2002年 / 37卷 / 07期
基金：
中国国家自然科学基金;
关键词：
intermetallic compounds; structural materials; mechanical properties; microstructure;
D O I：
10.1016/S0025-5408(02)00767-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The dependences of the room temperature tensile properties of two-phase TiAl alloys with fully lamellar microstructures on colony size and the effects of alloying elements on the k value of Hall-Petch relationship were investigated. It is found that the ultimate tensile strength and the yield strength show Hall-Petch dependences on colony size, but the ductility does not obey a Hall-Petch dependence on colony size. The k value of Hall-Petch relationship increases when Ti-47Al (at.%) is alloyed with interstitial elements C or B, but the additions of substitutional elements Cr or Nb don't lead to its apparent change. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1315 / 1321
页数：7
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