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题名: Creep resistance and material degradation of a candidate Ni-Mo-Cr corrosion resistant alloy
作者: Shrestha, SL; Bhattacharyya, D; Yuan, GZ; Li, ZJJ; Budzakoska-Testone, E; De Los Reyes, M; Drew, M; Edwards, L
刊名: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
出版日期: 2016
卷号: 674, 页码:64-75
关键词: Nickel based alloy ; Creep deformation ; Carbide precipitation ; Scanning electron microscopy ; Electron backscatter diffraction ; Transmission electron microscopy
DOI: 10.1016/j.msea.2016.07.032
通讯作者: Shrestha, SL (reprint author), ANSTO, Inst Mat Engn, Locked Bag 2001, Kirrawee Dc, NSW 2232, Australia.
文章类型: 期刊论文
英文摘要: 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.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000383292800009
ISSN号: 0921-5093
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/26460
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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