Thermo-mechanical fatigue behavior of cast nickel-based superalloy K417
Liu, F; Al, SH; Wang, YC; Zhang, H; Wang, ZG
Corresponding AuthorLiu, F()
AbstractThe thermo-mechanical fatigue (TMF) behavior of cast nickel-base superalloy K417 was investigated in full reversed total strain control in the temperature range from 400 to 850 degreesC, Both in-phase (maximum tensile strain at maximum temperature) and out-of-phase (maximum compressive strain at maximum temperature) experiments were conducted. Comparative evaluations were made with existing results of isothermal fatigue (IF) at 850 degreesC of the same alloy. It is found that TMF and IF cause more cyclic hardening in comparison with static tension at 850 degreesC. The tendency of IF cyclic hardening is higher than that of TMF. At the same mechanical strain and temperature, TMF shows shorter life as it compared with isothermal fatigue, and the in-phase cyclic life is lower than that of out-of-phase. Observations of fracture surfaces and longitudinal sections by SEM reveal that fatigue cracks of IP initiate at the grain boundaries and propagate intergranularly, and the cracks of OP nucleate within the grain and grow transgranularly.
Keywordcast nickel-base superalloy thermo-mechanical fatigue in-phase out-of-phase
Indexed BySCI
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000172766400010
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLiu, F
AffiliationChinese Acad Sci, Met Res Inst, State Key Lab Fatigue & Fracture Mat, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Liu, F,Al, SH,Wang, YC,et al. Thermo-mechanical fatigue behavior of cast nickel-based superalloy K417[J]. ACTA METALLURGICA SINICA,2001,37(3):267-271.
APA Liu, F,Al, SH,Wang, YC,Zhang, H,&Wang, ZG.(2001).Thermo-mechanical fatigue behavior of cast nickel-based superalloy K417.ACTA METALLURGICA SINICA,37(3),267-271.
MLA Liu, F,et al."Thermo-mechanical fatigue behavior of cast nickel-based superalloy K417".ACTA METALLURGICA SINICA 37.3(2001):267-271.
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