Temperature dependence of dislocation microstructure in Ni-3(Al,Hf)

被引：18

作者：

Kruml, T ^{[1
]}

Viguier, B ^{[1
]}

Bonneville, J ^{[1
]}

Martin, JL ^{[1
]}

机构：

[1] ECOLE POLYTECH FED LAUSANNE,INST GENIE ATOM,DP,CH-1015 LAUSANNE,SWITZERLAND

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1997年 / 234卷

关键词：

Ni3Al; APE energy; dislocations; in-situ heating;

D O I：

10.1016/S0921-5093(97)00391-2

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Transmission electron microscopy observations were performed on Ni74.8Al21.9Hf3.3 specimens deformed at different temperatures (room temperature to 983 K). The dissociation width of superdislocations has been examined as a function of the deformation temperature in these samples. Evolution of the dissociation width was also investigated during in-situ heating experiment up to 1000 K. The temperature dependence of the antiphase boundary energy (gamma(APB)) was deduced from these observations. The importance of taking into account the temperature dependence of elastic constants is highlighted and it is shown that gamma(APB) decreases with increasing temperature. (C) 1997 Elsevier Science S.A.

引用

页码：755 / 757

页数：3

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