Effect of ternary iron addition on the creep behaviour of NiAl

被引：3
|
作者：
Wang, YL [1 ]
Smallman, RE [1 ]
Jones, IP [1 ]
机构：
[1] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2002年 / 329卷
关键词：
creep; climb; diffusion; subgrain;
D O I：
10.1016/S0921-5093(01)01640-9
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Constant load creep tests have been carried out on polycrystalline NiAl in the temperature range 750-900degreesC and at stresses from 35 to 75 MPa. It was found that the creep rate of NiAl is controlled by dislocation climb, which gives rise to a well defined substructure; the addition of iron, which decreases the diffusion coefficient of NiAl, decreases the steady state creep rate of NiAl appreciably. Dislocations with a <100> Burgers vectors operate in both regimes, predominantly on 001 in the primary region and also on {011} in the steady state region. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：847 / 851
页数：5
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