Fatigue strength of spring steel with small scratches

Y. Nishimura, K. Yanase, Y. Ikeda, Y. Tanaka, N. Miyamoto, S. Miyakawa, M. Endo

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1514-1528
Number of pages15
JournalFatigue and Fracture of Engineering Materials and Structures
Issue number7
Publication statusPublished - Jul 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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