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论文类型：期刊论文

发表时间：2016-01-05

发表刊物：MATERIALS & DESIGN

收录刊物：SCIE、EI

卷号：89

页面范围：1028-1034

ISSN号：0264-1275

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

摘要：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.