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Microstructural stability and mechanical properties of GH742 Ni-based wrought superalloy for turbine disk applications
Zhang, Fengzhi1,2; Wang, Changshuai1; Wu, Yunsheng1; Zhou, Lanzhang1; Tian, Qiang3
Corresponding AuthorWu, Yunsheng(yswu16b@imr.ac.cn) ; Zhou, Lanzhang(lzz@imr.ac.cn)
2022-01-14
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume832Pages:13
AbstractMicrostructural stability and mechanical properties were investigated in a Ni-based wrought superalloy during long-term thermal exposure at 650 degrees C and 700 degrees C for up to 7500h. The results demonstrate that the morphology of primary gamma' precipitate has no significant change after long-term thermal exposure, and it exhibits excellent thermal stability both at 650 degrees C and 700 degrees C. However, the morphology of secondary gamma' precipitates transformed from complex flower-like to rounded cubic during long-term exposure at 700 degrees C. The coarsening of tertiary spherical gamma' precipitates occurs with increasing thermal exposure time, and its coarsening behavior is consistent with Ostwald ripening theory. M23C6 carbides coarsen at grain boundaries and form continuous film with increasing time, resulting in the embrittlement of grain boundary. The multimodal distribution of gamma' precipitates results in high strength of the alloy after long-term thermal exposure. Both the strength of the alloy after exposure at 650 degrees C and 700 degrees C for 7500 h are not less than that of the alloy after standard heat treatment. The stress rupture lifetime tests at 650 degrees C/873 MPa increases firstly and then decreases with increasing exposure time at 650 degrees C and 700 degrees C. The increase of stress rupture lifetime is attributed to the supplementary precipitation and growth of finest tertiary gamma' precipitates, while the decrease of it is attributed to the gamma' evolution and the coarsen of M23C6 carbides.
KeywordNi-based wrought superalloy Microstructure evolution Mechanical properties Thermal exposure
Funding OrganizationNational Science and Technology Major Project of China
DOI10.1016/j.msea.2021.142488
Indexed BySCI
Language英语
Funding ProjectNational Science and Technology Major Project of China
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000761627800003
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/173199
Collection中国科学院金属研究所
Corresponding AuthorWu, Yunsheng; Zhou, Lanzhang
Affiliation1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
3.Ctr Iron & Steel Res Inst, High Temp Mat Res Inst, Beijing 100081, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Fengzhi,Wang, Changshuai,Wu, Yunsheng,et al. Microstructural stability and mechanical properties of GH742 Ni-based wrought superalloy for turbine disk applications[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,832:13.
APA Zhang, Fengzhi,Wang, Changshuai,Wu, Yunsheng,Zhou, Lanzhang,&Tian, Qiang.(2022).Microstructural stability and mechanical properties of GH742 Ni-based wrought superalloy for turbine disk applications.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,832,13.
MLA Zhang, Fengzhi,et al."Microstructural stability and mechanical properties of GH742 Ni-based wrought superalloy for turbine disk applications".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 832(2022):13.
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