|Gigacycle Fatigue Behavior of 1800 MPa Grade High Strength Spring Steel for Automobile Lightweight|
|J. M. Zhang; L. K. Ji; D. J. Bao; Y. R. Feng; S. X. Li; Y. Q. Weng
|Source Publication||Journal of Iron and Steel Research International
|Abstract||Gigacycle fatigue behavior of 60Si2CrVA high strength spring steel was investigated by ultrasonic fatigue test machine. Fatigue fractography was observed by scanning electron microscopy (SEM). Maximum inclusion sizes and fatigue strength in different volumes were estimated by statistics of extreme values (SEV) and generalized Pareto distribution (GPD) methods. The results showed that S-N curves of 60Si2CrVA spring steels for two rolling processes were not horizontal asymptotes but a gradient in a regime of 10(9) cycles, and traditional fatigue limits were eliminated. Surface machined topography and inclusions in steel were major factors that led to elimination of fatigue limit for 60Si2CrVA spring steel. The SEV and GPD methods could effectively predict size of the maximum inclusion and fatigue strength in different volumes of 60Si2CrVA spring steel. Predicted fatigue strength was in accordance with experimental results by ultrasonic fatigue testing.|
; ji, ling-kang
; feng, yao-rong] cnpc tubular goods res inst, xian 710065, shaanxi, peoples r china. [bao, dong-jie] xingtai polytech coll, xingtai 054035, hebei, peoples r china. [li, shou-xin] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china. [weng, yu-qing] cent iron & steel res inst, beijing 100081, peoples r china.
; zhang, jm (reprint author), cnpc tubular goods res inst, xian 710065, shaanxi, peoples r china.
Statistics Of Extreme Value (Sev)
Generalized Pareto Distribution (Gpd)
High Cycle Fatigue
J. M. Zhang,L. K. Ji,D. J. Bao,et al. Gigacycle Fatigue Behavior of 1800 MPa Grade High Strength Spring Steel for Automobile Lightweight[J]. Journal of Iron and Steel Research International,2014,21(6):614-618.
J. M. Zhang,L. K. Ji,D. J. Bao,Y. R. Feng,S. X. Li,&Y. Q. Weng.(2014).Gigacycle Fatigue Behavior of 1800 MPa Grade High Strength Spring Steel for Automobile Lightweight.Journal of Iron and Steel Research International,21(6),614-618.
J. M. Zhang,et al."Gigacycle Fatigue Behavior of 1800 MPa Grade High Strength Spring Steel for Automobile Lightweight".Journal of Iron and Steel Research International 21.6(2014):614-618.
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