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Low-Cycle Fatigue Properties of Nickel-Based Superalloys Processed by High-Gradient Directional Solidification
Fan, Z. D.; Wang, D.; Liu, C.; Zhang, G.; Shen, J.; Lou, L. H.; Zhang, J.; Wang, D (reprint author), Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Liaoning, Peoples R China.
2017-09-01
Source PublicationCHINESE ACAD SCIENCES, INST METAL RESEARCH
ISSN1006-7191
Volume30Issue:9Pages:878-886
AbstractThe low-cycle fatigue (LCF) properties of DD10 (single-crystal) and DZ53 (columnar-grained) superalloys solidified by liquid-metal cooling (LMC) and high-rate solidification (HRS) processes have been systematically investigated. It was found that the LCF life of DZ53 solidified by LMC was obviously better than that solidified by HRS. In contrast, for DD10, LMC showed no remarkable influences on LCF properties at high temperature and only improved LCF properties at intermediate temperature. Microstructure examination showed that the cracks generally initiated at micropores in the subsurface at intermediate temperature. However, the cracks occurred on the surface due to oxidation, or persistent slip bands near script-MC at high temperature. Therefore, the benefits of LMC technique can be attributed to both of the reduced casting defects which significantly affect the LCF properties at intermediate temperature and the improved microstructural homogeneity which was strongly correlated to the LCF properties of alloys at high temperature.; The low-cycle fatigue (LCF) properties of DD10 (single-crystal) and DZ53 (columnar-grained) superalloys solidified by liquid-metal cooling (LMC) and high-rate solidification (HRS) processes have been systematically investigated. It was found that the LCF life of DZ53 solidified by LMC was obviously better than that solidified by HRS. In contrast, for DD10, LMC showed no remarkable influences on LCF properties at high temperature and only improved LCF properties at intermediate temperature. Microstructure examination showed that the cracks generally initiated at micropores in the subsurface at intermediate temperature. However, the cracks occurred on the surface due to oxidation, or persistent slip bands near script-MC at high temperature. Therefore, the benefits of LMC technique can be attributed to both of the reduced casting defects which significantly affect the LCF properties at intermediate temperature and the improved microstructural homogeneity which was strongly correlated to the LCF properties of alloys at high temperature.
description.department[fan, z. d. ; wang, d. ; liu, c. ; zhang, g. ; shen, j. ; lou, l. h. ; zhang, j.] chinese acad sci, inst met res, superalloys div, shenyang 110016, liaoning, peoples r china ; [zhang, j.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china ; [fan, z. d.] xian thermal power res inst co ltd, xian 710054, shaanxi, peoples r china
KeywordSuperalloys Rapid Solidification Low-cycle Fatigue Microstructure
Subject AreaMetallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51631008, 51101160, 2010CB631201]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79123
Collection中国科学院金属研究所
Corresponding AuthorWang, D (reprint author), Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Fan, Z. D.,Wang, D.,Liu, C.,et al. Low-Cycle Fatigue Properties of Nickel-Based Superalloys Processed by High-Gradient Directional Solidification[J]. CHINESE ACAD SCIENCES, INST METAL RESEARCH,2017,30(9):878-886.
APA Fan, Z. D..,Wang, D..,Liu, C..,Zhang, G..,Shen, J..,...&Wang, D .(2017).Low-Cycle Fatigue Properties of Nickel-Based Superalloys Processed by High-Gradient Directional Solidification.CHINESE ACAD SCIENCES, INST METAL RESEARCH,30(9),878-886.
MLA Fan, Z. D.,et al."Low-Cycle Fatigue Properties of Nickel-Based Superalloys Processed by High-Gradient Directional Solidification".CHINESE ACAD SCIENCES, INST METAL RESEARCH 30.9(2017):878-886.
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