Giga-fatigue life prediction of FV520B-I with surface roughness

Indexed by:期刊论文

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.

Date of Publication:2016-01-05