Instrumented oscillographic study on impact toughness of an axle steel DZ2 with different tempering temperatures

作     者：Shuo Liu Peng Zhang Bin Wang Kaizhong Wang Zikuan Xu Fangzhong Hu Xin Bai Qiqiang Duan Zhefeng Zhang Shuo Liu;Peng Zhang;Bin Wang;Kaizhong Wang;Zikuan Xu;Fangzhong Hu;Xin Bai;Qiqiang Duan;Zhefeng Zhang

作者机构：Shi-changxu Innovation Center for Advanced MaterialsInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and EngineeringUniversity of Science and Technology of ChinaShenyang 110016China Technology CenterMa'anshan Iron and Steel Co.Ltd.Ma'anshan 243000China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2024年第31卷第7期

页      面：1590-1598页

核心收录：

学科分类：080503[工学-材料加工工程] 0819[工学-矿业工程] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：the National Natural Science Foundation of China(Nos.52001310 and 52130002) the National Science and Technology Major Project(No.J2019-VI-0019-0134) KC Wong Education Foundation(No.GJTD-2020-09) Institute of Metal Res earch Innovation Fund(No.2023-ZD01) 

主　　题：axle steel DZ2 tempering process impact toughness oscillographic impact test impact crack propagation carbides 

摘      要：Compared with the conventional Charpy impact test method,the oscillographic impact test can help in the behavioral analysis of materials during the fracture *** this study,the trade-off relationship between the strength and toughness of a DZ2 axle steel at various tempering temperatures and the cause of the improvement in impact toughness was *** tempering process dramatically influenced carbide precipitation behavior,which resulted in different aspect ratios of *** toughness improved along with the rise in tempering temperature mainly due to the increase in energy required in impact crack *** characteristics of the impact crack propagation process were studied through a comprehensive analysis of stress distribution,oscilloscopic impact statistics,fracture morphology,and carbide *** poor impact toughness of low-tempering-temperature specimens was attributed to the increased number of stress concentration points caused by carbide morphology in the small plastic zone during the propagation process,which resulted in a mixed distribution of brittle and ductile fractures on the fracture surface.