Evolution of TCP Phase During Long Term Thermal Exposure in Several Re-Containing Single Crystal Superalloys
Tan, Zihao1,2; Yang, Lin1; Wang, Xinguang2; Du, Yunling2; Ye, Lihua2; Hou, Guichen2; Yang, Yanhong2; Liu, Jinlai2; Liu, Jide2; Li, Jinguo2; Zhou, Yizhou2; Sun, Xiaofeng2
Corresponding AuthorYang, Lin( ; Wang, Xinguang(
AbstractThe application and component designs of single crystal superalloys are restricted by the precipitation of topologically closed packed (TCP) phases, which can deteriorate the microstructural stability of the alloys severely. Limited researches concerning the type and morphology evolution of TCP phases under elevated temperature conditions have been reported previously. In the present work, three Re-containing single crystal alloys were designed to investigate TCP phase evolution via long term isothermal exposure tests at 1120 degrees C while the effects of Re on the microstructural characteristic and elements segregation were also clarified. The results showed that the addition of Re increased the instability of the alloys and the volume fraction of the TCP phases exceeded 5 vol% when the Re content reached 3 wt%. The increasing Re content had also raised the precipitation temperature of TCP phases but it did not change the type of them after long term aging; all the TCP particles were identified as mu phase in this study. Moreover, the elements segregation became considerably serious as Re addition increased constantly, which brought about various morphologies of the mu phase in the experimental alloys. In particular, the rod-like and needle-like mu phases demonstrated the typical orientation within gamma matrix while the blocky mu phase was dispersedly distributed in the space. No specific orientation relationship could be observed in the mu phase when the addition of Re exceeded certain threshold value.
KeywordSingle crystal superalloys Topologically closed packed (TCP) phase Re Elements segregation Morphology
Indexed BySCI
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000527992300011
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Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorYang, Lin; Wang, Xinguang
Affiliation1.Shenyang Univ Technol, Sch Mat Sci & Engn, 111 Shenliao Rd, Shenyang 110870, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Superalloys Div, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Tan, Zihao,Yang, Lin,Wang, Xinguang,et al. Evolution of TCP Phase During Long Term Thermal Exposure in Several Re-Containing Single Crystal Superalloys[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2020,33(5):731-740.
APA Tan, Zihao.,Yang, Lin.,Wang, Xinguang.,Du, Yunling.,Ye, Lihua.,...&Sun, Xiaofeng.(2020).Evolution of TCP Phase During Long Term Thermal Exposure in Several Re-Containing Single Crystal Superalloys.ACTA METALLURGICA SINICA-ENGLISH LETTERS,33(5),731-740.
MLA Tan, Zihao,et al."Evolution of TCP Phase During Long Term Thermal Exposure in Several Re-Containing Single Crystal Superalloys".ACTA METALLURGICA SINICA-ENGLISH LETTERS 33.5(2020):731-740.
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