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Microstructural Stability and Creep Performance of a Novel Low-Cost Single Crystal Superalloy
Tan, Z. H.2,3; Wang, X. G.1,2; Du, Y. L.2; Li, Y. M.2; Yang, Y. H.2; Liu, J. L.2; Liu, J. D.2; Li, J. G.2; Zhou, Y. Z.2; Sun, X. F.2
Corresponding AuthorWang, X. G.(xgwang11b@imr.ac.cn)
2021-09-10
Source PublicationMETALS AND MATERIALS INTERNATIONAL
ISSN1598-9623
Pages12
AbstractThe increasing pursuit of advanced aero-engines with lower ratio between the cost and performance has greatly promoted the demanding of single crystal superalloys characterized by low cost and outstanding temperature capability. In this study, a novel low-cost single crystal superalloy was designed and the creep tests as well as micro-characterization were carried out on the experimental alloy. The results illustrated that the novel single crystal alloy exhibited an ideal microstructural stability without precipitating TCP phases, after long-term thermal exposure at the ultimate service temperature of third generation single crystal superalloys. Moreover, the experimental alloy with only 3 wt% Re addition demonstrated remarkable creep resistance and maintained a very low minimum creep rate at 1100 degrees C/137 MPa and 1120 degrees C/137 MPa, while the accumulation and coalescence of micro-pores had eventually led to the alloy fracture. Apart from that, the compact interfacial dislocation networks the 2nd gamma' phase were observed after high-temperature creep rupture, and the typical a < 010 > superdislocations with relatively poor mobility was found at 1120 degrees C. At 760 degrees C/800 MPa, both the minimum creep velocity and entire creep stain was increased evidently, however, the ultimate creep rupture life of the alloy had still reached 200 h. The corresponding deformation mechanism was identified as the combination of superdislocation pairs shearing and a/3 <121 > partial dislocation cutting the gamma' phase with a SISF being generated. In general, the novel single crystal alloy characterized by remarkable mechanical properties and cost reduction possesses a great potential for future application in the advanced aircraft engines.
KeywordNovel single crystal superalloy Microstructural evolution Comprehensive creep property Fracture characteristic Deformation mechanism
Funding OrganizationInnovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences ; National Key R&D Program of China ; National Science and Technology Major Project ; National Natural Science Foundation of China (NSFC) ; Youth Innovation Promotion Association, Chinese Academy of Sciences
DOI10.1007/s12540-021-01040-4
Indexed BySCI
Language英语
Funding ProjectInnovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences[CXYJJ20-MS-03] ; National Key R&D Program of China[2017YFA0700704] ; National Science and Technology Major Project[2017-VI-0002-0072] ; National Natural Science Foundation of China (NSFC)[51671188] ; Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000694777700001
PublisherKOREAN INST METALS MATERIALS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/166940
Collection中国科学院金属研究所
Corresponding AuthorWang, X. G.
Affiliation1.Chinese Acad Sci, Innovat Acad Light Duty Gas Turbine, Beijing 100089, Peoples R China
2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Tan, Z. H.,Wang, X. G.,Du, Y. L.,et al. Microstructural Stability and Creep Performance of a Novel Low-Cost Single Crystal Superalloy[J]. METALS AND MATERIALS INTERNATIONAL,2021:12.
APA Tan, Z. H..,Wang, X. G..,Du, Y. L..,Li, Y. M..,Yang, Y. H..,...&Sun, X. F..(2021).Microstructural Stability and Creep Performance of a Novel Low-Cost Single Crystal Superalloy.METALS AND MATERIALS INTERNATIONAL,12.
MLA Tan, Z. H.,et al."Microstructural Stability and Creep Performance of a Novel Low-Cost Single Crystal Superalloy".METALS AND MATERIALS INTERNATIONAL (2021):12.
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