Effect of ruthenium on compressive creep of Ni-based single-crystal superalloy

被引：26
作者：
Shimabayashi, Shunsuke [1 ]
Kakehi, Koji [1 ]
机构：
[1] Tokyo Metropolitan Univ, Dept Mech Engn, Tokyo 1920397, Japan
来源：
SCRIPTA MATERIALIA | 2010年 / 63卷 / 09期
关键词：
Superalloy; Creep; Compression test; Twinning; TENSION/COMPRESSION ASYMMETRY; SHEAR; MECHANISMS; BEHAVIOR;
D O I：
10.1016/j.scriptamat.2010.06.048
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Effects of Ru on the compressive creep of Ni-based single-crystal superalloys were investigated at 750 and 900 degrees C. The addition of Ru improved the creep strength at 750 degrees C. It enhanced the dissociation of dislocations in the matrix channels and would inhibit the nucleation of the a < 1 1 2 > dislocation ribbons which shear the matrix and the precipitates; as a result, the mechanical-twin formation was also impeded and creep strength was increased. However, Ru addition did not improve creep strength at 900 degrees C. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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收藏
页码：909 / 912
页数：4
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