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Microstructural evolution and tensile properties of oxide dispersion strengthened Alloy 617 at elevated temperatures
Chun, Y. B.1; Mao, X.2; Han, C. H.1; Jang, J.1
2017-10-26
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume706Issue:Pages:161-171
AbstractThis study investigated evolution of the microstructure of oxide dispersion strengthened Alloy 617 with annealing temperature. A mixture of prealloyed Alloy 617 and Y2O3 powders was mechanically alloyed and consolidated by hot-extrusion at 1100 degrees C. Hot extrusion developed a submicron-sized grain structure with M23C6 carbides and finely dispersed Al2O3 and Y2Ti2O7 oxides. The fine-grained structure was stable during subsequent annealing at temperatures up to 1250 degrees C. Further increase of annealing temperature to 1300 degrees C resulted in a significantly coarsened grain structure, which was coincident with the abrupt coarsening of oxides. M23C6 carbides in the as-extruded conditions were transformed to M7C3 carbides with complex shapes when annealed at 1200 degrees C, and their shapes changed to very coarse hexagonal prisms at 1250 degrees C, which was followed by the formation of eutectic M2C carbides at grain boundaries at 1300 degrees C. Tensile tests of the as-extruded ODS Alloy 617 showed that the yield strength decreased steeply at a transition temperature of around 600 degrees C, which can be attributed to diffusional creep along the grain boundaries.
SubtypeArticle
KeywordOxide Dispersion Strengthened Alloys Carbides Grain Growth Yield Strength
WOS HeadingsScience & Technology ; Technology
Funding OrganizationKorea Atomic Energy Research Institute R D Program(527520-17) ; Korea Atomic Energy Research Institute R D Program(527520-17)
DOI10.1016/j.msea.2017.09.009
WOS KeywordCR-C ALLOY ; CARBIDE PRECIPITATION ; ELECTRON-MICROSCOPE ; FERRITIC STEELS ; STABILITY ; SUPERALLOY ; BEHAVIOR ; CREEP ; CHALLENGES ; PARTICLES
Indexed BySCI
Language英语
Funding OrganizationKorea Atomic Energy Research Institute R D Program(527520-17) ; Korea Atomic Energy Research Institute R D Program(527520-17)
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000413284400018
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Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/33820
Collection中国科学院核能安全技术研究所
Affiliation1.Korea Atom Energy Res Inst, Nucl Mat Dev Div, 989-111 Daedoek Daero, Yuseong 34057, Daejeon, South Korea
2.Chinese Acad Sci, Inst Nucl Energy Safety Technol, Key Lab Neutron & Radiat Safety, Hefei 230031, Anhui, Peoples R China
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GB/T 7714
Chun, Y. B.,Mao, X.,Han, C. H.,et al. Microstructural evolution and tensile properties of oxide dispersion strengthened Alloy 617 at elevated temperatures[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2017,706(无):161-171.
APA Chun, Y. B.,Mao, X.,Han, C. H.,&Jang, J..(2017).Microstructural evolution and tensile properties of oxide dispersion strengthened Alloy 617 at elevated temperatures.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,706(无),161-171.
MLA Chun, Y. B.,et al."Microstructural evolution and tensile properties of oxide dispersion strengthened Alloy 617 at elevated temperatures".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 706.无(2017):161-171.
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