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Indexed by:期刊论文

Date of Publication:2016-01-05

Journal:MATERIALS & DESIGN

Included Journals:SCIE、EI

Volume:89

Page Number:1028-1034

ISSN No.:0264-1275

Key Words:Martensitic stainless steel; FV520B-I; Surface roughness; Fatigue life prediction; Giga-cycle fatigue

Abstract:Surface roughness has proven to be an important factor on the fatigue life of FV520B-I. However few laboratory experiments on fatigue properties with the consideration of surface roughness are reported in literature. In this paper, giga-cycle fatigue experiment was conducted to obtain fatigue data and the mechanism of fracture development for FV520B-I. With a comprehensive use of energy theory, fracture developing mechanics and the impact of stress ratio, a life prediction model for FV520B-I with the synthesis of surface roughness information is established. Using the fatigue data, including life time and inclusion size, an FV520B-I empirical fatigue life prediction model is identified by both model fitting and model parameters estimation. This model of giga-cycle fatigue of FV520-I is novel to the study of FV520B-I because of the surface roughness considered comprehensively in modeling. This result will also highly enhance the research development in remanufacturing engineering. (C) 2015 Elsevier Ltd. All rights reserved.