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Abstract：
In-situ tensile experiments of Ni-Al, Ni-Al-Re and Ni-Al-Re-Ru model single-crystal superalloys were performed in scanning electron microscope (SEM) at room temperature. The plastic deformation mechanisms of all the three model superalloys were double-oriented slipping of dislocations. Micro-cracks were often formed at the intersection of two sets of slip lines. The fracture surfaces of Ni-Al and Ni-Al-Re-Ru alloys were nearly parallel to (010) planes and that of the Ni-Al-Re alloys was nearly parallel to (1-11) plane. The dislocation configuration was analyzed by transmission electron microscopy (TEM). The a/2 ＜ 110 ＞ dislocation pairs coupled with antiphase boundary (APB) cut into gamma＇ phase in the Ni-Al and Ni-Al-Re-Ru model superalloys. In addition to these dislocations, stacking faults also cut into gamma＇ phase in Ni-Al-Re model superalloys. The different fracture surfaces of different model single-crystal superalloys were attributed to the influence of elements Re and Ru on the dislocation configuration.
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MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN： 0921-5093
Year： 2017
Volume： 682
Page： 90-97
6 . 4 0 0
JCR@2022
ESI Discipline： MATERIALS SCIENCE;
ESI HC Threshold：287
CAS Journal Grade：2
Cited Count：
WoS CC Cited Count： 32
SCOPUS Cited Count： 34
ESI Highly Cited Papers on the List： 0 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 6
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