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Open AccessArticle

Fatigue Life Evaluation Considering Fatigue Reliability and Fatigue Crack for FV520B-I in VHCF Regime Based on Fracture Mechanics

1
Marine engineering college, Dalian Maritime University, Dalian 116000, China
2
School of mechanical engineering, Dalian University of Technology, Dalian 116000, China
*
Author to whom correspondence should be addressed.
Metals 2020, 10(3), 371; https://doi.org/10.3390/met10030371
Received: 12 February 2020 / Revised: 4 March 2020 / Accepted: 11 March 2020 / Published: 13 March 2020
This paper focuses on the fatigue reliability analysis and the development of a new life model of reliability and crack growth mechanisms in FV520B-I (high strength martensitic-type stainless steels) in the very-high cycle fatigue (VHCF) regime, which haven’t been studied well. First, the fatigue test was carried out to clarify the fatigue failure mechanism in the very-high cycle regime. Based on the test results and fatigue reliability theory, the fatigue life distribution and P-S-N curves were modeled. A new fatigue life evaluation model for FV520B-I is proposed according to the fracture mechanics and classic life evaluation method. With the comprehensive application of P-S-N curves and a new proposed fatigue life evaluation model, a new assumption of a P-Sc-N curve is developed and verified, to quantitatively express the relationship between fatigue life, reliability and fatigue cracking. This is novel and valuable for further fatigue study of FV520B-I. View Full-Text
Keywords: FV520B-I; fatigue reliability; P-Sc-N curve FV520B-I; fatigue reliability; P-Sc-N curve
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Wang, J.; Yang, Y.; Yu, J.; Wang, J.; Du, F.; Zhang, Y. Fatigue Life Evaluation Considering Fatigue Reliability and Fatigue Crack for FV520B-I in VHCF Regime Based on Fracture Mechanics. Metals 2020, 10, 371.

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