Fatigue Crack Growth Behavior of Eutectoid Steel Rail

作     者：CEN Yaodong CHEN Lin JI Chunjiao WANG Huijun BAO Xirong 岑耀东;陈林;JI Chunjiao;WANG Huijun;BAO Xirong

作者机构：School of Materials and MetallurgyInner Mongolia University of Science and TechnologyBaotou 014010China 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2022年第37卷第3期

页      面：507-512页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0702[理学-物理学] 0823[工学-交通运输工程] 

基　　金：Inner Mongolia Science and Technology Major Project(No.ZDZX2018024) Natural Science Foundation of Inner Mongolia(No.2019LH05016) Research Program of Science at Universities of Inner Mongolia Autonomous Region of China(No.NJZY20089) Innovation Fund of Inner Mongolia University of Science and Technology(No.2019QDL-B06) 

主　　题：fatigue fracture crack growth rail microstructure 

摘      要：The fatigue crack behavior of U75V rail under different quenching rates was studied using SEM and *** results show that the pearlite interlayer spacing and fatigue crack growth rate decrease,and the deflection path of cracks and the number of branching cracks of U75V rail increases with an increase of cooling *** tearing edge of unstable region transites from pearlite lamellae to *** fatigue crack growth path is closely related to the orientation of lamellae in pearlite *** are three modes direction of fatigue crack growth path and pearlite lamellar,which are parallel,vertical and 45°angle,and most of the branch cracks occur at an angle of 45°between the lamellar direction and the crack *** specifically,the deflection paths of cracks and branching crack have a relaxation effect on the stress intensity at the crack tip,which restrains the fatigue crack growth rate.