Creep resistance and material degradation of a candidate Ni-Mo-Cr corrosion resistant alloy
Shrestha, SL; Bhattacharyya, D; Yuan, GZ; Li, ZJJ; Budzakoska-Testone, E; De Los Reyes, M; Drew, M; Edwards, L; Shrestha, SL (reprint author), ANSTO, Inst Mat Engn, Locked Bag 2001, Kirrawee Dc, NSW 2232, Australia.
2016
发表期刊MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
卷号674页码:64-75
文章类型期刊论文
摘要This study investigated the creep deformation properties of GH3535, a Ni-Mo-Cr corrosion resistant structural alloy being considered for use in future Gen IV molten salt nuclear reactors (MSR) operating at around 700 degrees C. Creep testing of the alloy was conducted at 650-750 degrees C under applied stresses between 85-380 MPa. From the creep rupture results the long term creep strain and rupture life of the alloy were estimated by applying the Dorn Shepard and Larson Miller time-temperature parameters and the alloy's allowable ASME design stresses at the MSR's operating temperature were evaluated. The material's microstructural degradation at creep rupture was characterised using scanning electron microscopy (SEM), electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). The micro structural study revealed that the material failure was due to wedge cracking at triple grain boundary points and cavitation at coarse secondary grain boundary precipitates, nucleated and grown during high temperature exposure, leading to intergranular crack propagation. EBSD local misorientation maps clearly show that the root cause of cavitation and crack propagation was due to large strain localisation at the grain boundaries and triple points instigated by grain boundary sliding during creep deformation. This caused the grain boundary decohesion and subsequent material failure. Crown Copyright (C) 2016 Published by Elsevier B.V. All rights reserved.
关键词Nickel Based Alloy Creep Deformation Carbide Precipitation Scanning Electron Microscopy Electron Backscatter Diffraction Transmission Electron Microscopy
DOI10.1016/j.msea.2016.07.032
收录类别SCI
语种英语
WOS记录号WOS:000383292800009
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/26460
专题中科院上海应用物理研究所2011-2018年
通讯作者Shrestha, SL (reprint author), ANSTO, Inst Mat Engn, Locked Bag 2001, Kirrawee Dc, NSW 2232, Australia.
推荐引用方式
GB/T 7714
Shrestha, SL,Bhattacharyya, D,Yuan, GZ,et al. Creep resistance and material degradation of a candidate Ni-Mo-Cr corrosion resistant alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2016,674:64-75.
APA Shrestha, SL.,Bhattacharyya, D.,Yuan, GZ.,Li, ZJJ.,Budzakoska-Testone, E.,...&Shrestha, SL .(2016).Creep resistance and material degradation of a candidate Ni-Mo-Cr corrosion resistant alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,674,64-75.
MLA Shrestha, SL,et al."Creep resistance and material degradation of a candidate Ni-Mo-Cr corrosion resistant alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 674(2016):64-75.
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