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Temperature dependence on tensile deformation mechanisms in a novel Nickel-based single crystal superalloy
Tan, Z. H.1,2; Wang, X. G.1; Du, Y. L.1; Duan, T. F.3; Yang, Y. H.1; Liu, J. L.1; Liu, J. D.1; Yang, L.2; Li, J. G.1; Zhou, Y. Z.1; Sun, X. F.1
Corresponding AuthorWang, X. G.(xgwang11b@imr.ac.cn) ; Zhou, Y. Z.(yzzhou@imr.ac.cn) ; Sun, X. F.(xfsun@imr.ac.cn)
2020-03-03
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume776Pages:10
AbstractThe affordability has become a key element in the development of the modern aero-engines thus the design and research of low-cost single crystal superalloys are in great demand. A kind of novel Nickel-based single crystal superalloy with cost reduction was designed in this work and the temperature dependence on the microstructure modification as well as corresponding deformation mechanisms during tensile tests were systematically investigated. The experimental alloy exhibited a remarkable yield strength of 912 MPa but relatively poor ductility at 760 degrees C. At higher temperatures, an overt strain softening occurred before the tensile rupture and the fracture features were identified as dimples induced by the accumulated micro-pores. The stacking faults shearing mechanism prevailed at room temperature and there presented two types of stacking faults in the gamma' precipitates. Both decomposition and cross-slip of the a/2 <101> superdislocadon were observed at 760 degrees C while the deformation mechanism was controlled by APB-coupled dislocation pairs shearing the gamma' phase at 980 degrees C. With temperature increasing to 1100 degrees C and 1120 degrees C, the amount of shearing dislocation pairs decreased dramatically, besides, the interfacial dislocation networks and rafted gamma/gamma' structures were formed. The degradation of mechanical properties was considerably slight from 1100 degrees C to 1120 degrees C, however, three primary microstructure modifications were emphasized.
KeywordSingle crystal superalloy Tensile property Fracture characteristic Stacking fault Deformation mechanism
Funding OrganizationNational Key R&D Program of China ; National Science and Technology Major Project ; Natural Science Foundation of Liaoning Province ; National Natural Science Foundation of China (NSFC) ; State Key Lab of Advanced Metals and Materials Open Fund ; Youth Innovation Promotion Association, Chinese Academy of Sciences
DOI10.1016/j.msea.2020.138997
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2017YFA0700704] ; National Science and Technology Major Project[2017-VI-0002-0072] ; Natural Science Foundation of Liaoning Province[20170520038] ; National Natural Science Foundation of China (NSFC)[51601192] ; National Natural Science Foundation of China (NSFC)[51671188] ; State Key Lab of Advanced Metals and Materials Open Fund[2018-Z07] ; Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000517665100006
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/137363
Collection中国科学院金属研究所
Corresponding AuthorWang, X. G.; Zhou, Y. Z.; Sun, X. F.
Affiliation1.Chinese Acad Sci, Inst Met Res, Superalloys Div, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Shenyang Univ Technol, Sch Mat Sci & Engn, 111 Shenliao Rd, Shenyang 110870, Peoples R China
3.Liaoning Res Inst Light Ind, 3 Chongshan Rd, Shenyang 110030, Peoples R China
Recommended Citation
GB/T 7714
Tan, Z. H.,Wang, X. G.,Du, Y. L.,et al. Temperature dependence on tensile deformation mechanisms in a novel Nickel-based single crystal superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,776:10.
APA Tan, Z. H..,Wang, X. G..,Du, Y. L..,Duan, T. F..,Yang, Y. H..,...&Sun, X. F..(2020).Temperature dependence on tensile deformation mechanisms in a novel Nickel-based single crystal superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,776,10.
MLA Tan, Z. H.,et al."Temperature dependence on tensile deformation mechanisms in a novel Nickel-based single crystal superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 776(2020):10.
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