Fatigue strength of spring steel with small scratches. Issue 7 (26th February 2018)

• Record Type: Journal Article
• Authors: Nishimura, Y.; Yanase, K.; Ikeda, Y.; Tanaka, Y.; Miyamoto, N.; Miyakawa, S.; Endo, M.
• Is Part Of: Fatigue & fracture of engineering materials & structures. Volume 41:Issue 7(2018)
• Page Start: 1514
• Page End: 1528
• Publication Date: 2018-02-26
• Subjects: area parameter -- rotating bending -- small cracks -- small scratch -- spring steel -- torsional fatigue limit -- VHCF; Materials -- Fatigue -- Periodicals; Fracture mechanics -- Periodicals; 620.1123
• DOI: 10.1111/ffe.12793
• Languages: English
• ISSNs: 8756-758X

Abstract

Abstract: In compression coil springs subjected to cyclic load, fatigue cracks can sometimes initiate and propagate from scratch‐like small defects produced during the manufacturing process and degrade the fatigue strength. In this study, torsional and rotating bending fatigue tests were conducted to examine the fatigue behavior of a high‐strength spring steel (JIS G 3561, SWOSC‐V) in the presence of small scratches. The sensitivity of the HCF and VHCF strength to small scratches was evaluated based on the area parameter model.