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题名: Effect of long-term thermal exposure on the hot ductility behavior of GH3535 alloy
作者: Han, FF; Zhou, BM; Huang, HF; Leng, B; Lu, YL; Li, ZJ; Zhou, XT
刊名: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
出版日期: 2016
卷号: 673, 页码:299-306
关键词: GH3535 alloy ; Hot ductility ; Thermal exposure ; Grain boundary sliding ; Carbides
DOI: 10.1016/j.msea.2016.07.034
通讯作者: Li, ZJ (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Thorium Molten Salts Reactor Ctr, Beijing 100864, Peoples R China.
文章类型: 期刊论文
英文摘要: The hot ductility behavior of Ni-16Mo-7Cr alloys (named GH3535) exposed at 700 degrees C for different durations has been investigated by means of tensile test. It was found that the alloy exhibited a constant low ductility within the first 10 h exposure, and then showed an increasing ductility with the exposure time until 1000 h. After that, the ductility of the alloy decreased gradually with the increasing exposure time up to 10000 h. Detailed microstructural investigations using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM) have shown that the change in the ductility of the alloy with the exposure time could be attributed to the precipitation of M12C carbide at the grain boundary. Such precipitates with size of 200 nm, which are formed during the thermal exposure within 1000 h, can significantly restrain the grain boundary sliding and crack initiation, resulting in the high ductility of the alloy. Further exposure will cause the coarsening of the carbides, making them as the source of grain boundary cracks, hence decreases the ductility of the alloy. (C) 2016 Elsevier B.V. All rights reserved.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000382410000035
ISSN号: 0921-5093
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/26486
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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