|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||L-85: VHCF Strength of Spring Steel with Small Scratches
||Yoshiro Nishimura, Masahiro Endo, Keiji Yanase, Yuichi Ikeda, Yuya Tanaka, Susumu Miyakawa, Nobuyuki Miyamoto
|On-Site Speaker (Planned)
A number of components in the automotive vehicles have various types of compression coil springs. These days, because of the strong demand for better performance of automotive vehicles, the use of high-strength spring steel has been increasing. When the compression coil springs are subjected to high cyclic stress, fatigue crack sometimes propagates from small defect or scratch produced in the manufacturing process. However, there are a limited number of studies on the fatigue behavior of high-strength spring steel in the presence of small defect, especially in very high cycle fatigue regime. In this study, a series of fatigue were systematically conducted by using a resonance-type torsional fatigue machine and ultrasonic torsional fatigue machine. Then, the sensitivity of high-strength spring steel (SWOSC-V) to small artificial defect was qualitatively and quantitatively examined both in high cycle and very high cycle fatigue regimes.
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