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Effects of Al on microstructural stability and related stress-rupture properties of a third-generation single crystal superalloy
Sun, Jingxia; Liu, Jinlai; Liu, Lirong; Zhou, Yizhou; Li, Jinguo; Sun, Xiaofeng
2019-11-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume35Issue:11Pages:2537-2542
AbstractTo examine the influences of minor modification of Al content on the microstructural stabilities and stress rupture properties, two alloys with minor difference in Al content were exposed isothermally at 1100 degrees C for 100 h, 500 h, and 1000 h, respectively. The microstructures were characterized before and after thermal exposure. It was found that when Al content was decreased by 0.4 wt %, the volume fraction gamma' decreased by 4 %, the size of gamma' increased by 40 nm, the matrix channel width increased by 5 nm, and the misfit degree of -gamma/gamma' phases increased by 0.006 % after heat treatment (HT). During thermal exposure, the alloy with low Al content had a better resistance to coarsening of gamma' phase and precipitation of mu phase. The gamma' particles of the alloy with high Al content tended to connect each other and coarsened along <100>directions; however, the gamma' particles of the alloy with low Al content remained cubic after 500 h. A serious coarsening behavior took place in the two alloys after aging for 1000 h. The structural stabilities were significantly improved. However, the change of 0.4 wt % Al content was found to have little effect on the high temperature stress-rupture properties. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordNi base single crystal superalloys Thermal exposure Microstructural stability Stress-rupture property Al
Indexed BySCI
Language英语
WOS IDWOS:000497965900013
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80652
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Sun, Jingxia,Liu, Jinlai,Liu, Lirong,et al. Effects of Al on microstructural stability and related stress-rupture properties of a third-generation single crystal superalloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(11):2537-2542.
APA Sun, Jingxia,Liu, Jinlai,Liu, Lirong,Zhou, Yizhou,Li, Jinguo,&Sun, Xiaofeng.(2019).Effects of Al on microstructural stability and related stress-rupture properties of a third-generation single crystal superalloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(11),2537-2542.
MLA Sun, Jingxia,et al."Effects of Al on microstructural stability and related stress-rupture properties of a third-generation single crystal superalloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.11(2019):2537-2542.
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