HCF behavior of material Tc17 considering surface roughness Ra Sibo Gao, Wei Yang, Jinlong Wang, Yang Yu, Qi Ding, Xiaohan Gao and Tian Tian MATEC Web Conf., 355 (2022) 01019 Published online: 12 January 2022 DOI: 10.1051/matecconf/202235501019