Giga-fatigue life prediction of FV520B-I with surface roughness. (5th January 2016)

• Record Type: Journal Article
• Authors: Wang, Jinlong; Zhang, Yuanliang; Sun, Qingchao; Liu, Shujie; Shi, Bowen; Lu, Huitian
• Is Part Of: Materials & design. Volume 89(2016)
• Page Start: 1028
• Page End: 1034
• Publication Date: 2016-01-05
• Subjects: Martensitic stainless steel -- FV520B-I -- Surface roughness -- Fatigue life prediction -- Giga-cycle fatigue; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2015.10.104
• Languages: English
• ISSNs: 0264-1275

Abstract

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. Graphical abstract: Highlights: The experiment is helpful for the investigation of fatigue life prediction of FV520B-I. The fatigue strength model combined with surface roughness for FV520B-I is established A empirical fatigue life model for FV520B-I is established with the consideration of surface roughness. The life model makes an advanced contribution to the surface fatigue study for FV520B-I.