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INFLUENCE OF Re ON MICROSTRUCTURES OF A DIRECTIONALLY SOLIDIFIED Ni-BASED SUPERALLOY
Zhang Siqian1; Wang Dong2; Wang Di2; Peng Jianqiang3
Corresponding AuthorWang Dong(dwang@imr.ac.cn)
2016-07-01
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume52Issue:7Pages:851-858
AbstractUp to now, considerable effort has been expended in attempts to investigate the influences of Re on Ni-based single crystal superalloys. However, few study had elucidated the influences of Re on carbide, boride and grain boundary. Therefore, the influence of a 2% Re (mass fraction) addition on the as-cast and heat-treated microstructures of a Ni-based directionally solidified superalloy was investigated by comparison with Re-free alloy using SEM, EPMA and TEM. The results show that Re accelerates the precipitation of mu phase in the periphery of eutectic and at grain boundary for as-cast microstructure. After heat treatment, Re also accelerates the precipitation of phase in the vicinity of primary MC carbide and at grain boundary. For 0Re alloy, there are small number of M6C carbide in the vicinity of primary MC carbide and M-23(C, B)(6) boro-carbide at grain boundary. For 2Re alloy, a large amount of blocky mu phase enveloped by thick gamma'-film is found in the vicinity of primary MC carbide and at grain boundary. Enrichment of B along the grain boundary is observed in 0Re alloy. On the contrary, relatively uniform distribution of B is found in 2Re alloy. The precipitation mechanism of mu phase during the process of heat treatment is also analyzed.
KeywordNi-based superalloy directional solidification Re mu phase grain boundary carbide
DOI10.11900/0412.1961.2015.00600
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000385747800010
PublisherSCIENCE PRESS
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/122989
Collection中国科学院金属研究所
Corresponding AuthorWang Dong
Affiliation1.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
3.Harbin Turbine Co Ltd, Harbin 150046, Peoples R China
Recommended Citation
GB/T 7714
Zhang Siqian,Wang Dong,Wang Di,et al. INFLUENCE OF Re ON MICROSTRUCTURES OF A DIRECTIONALLY SOLIDIFIED Ni-BASED SUPERALLOY[J]. ACTA METALLURGICA SINICA,2016,52(7):851-858.
APA Zhang Siqian,Wang Dong,Wang Di,&Peng Jianqiang.(2016).INFLUENCE OF Re ON MICROSTRUCTURES OF A DIRECTIONALLY SOLIDIFIED Ni-BASED SUPERALLOY.ACTA METALLURGICA SINICA,52(7),851-858.
MLA Zhang Siqian,et al."INFLUENCE OF Re ON MICROSTRUCTURES OF A DIRECTIONALLY SOLIDIFIED Ni-BASED SUPERALLOY".ACTA METALLURGICA SINICA 52.7(2016):851-858.
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