Fretting Fatigue Behaviour of Alloy Steel in the Very High Cycle Region Yoshinobu Shimamura, Reo Kasahara, Hitoshi Ishii, Keiichiro Tohgo, Tomoyuki Fujii, Toru Yagasaki and Soichiro Sumida MATEC Web Conf., 300 (2019) 18002 Published online: 02 December 2019 DOI: 10.1051/matecconf/201930018002