Study of the fatigue fractography of dual phase low carbon steel used in automotive industry  

作　　者：Ahmed A.Zainulabdeen Bahaa Sami Mahdi Jabbar H.Mohmmed Niveen Jamal Abdulkader Muslim Ali Mujtaba A.Flayyih 

机构地区：[1]Materials Engineering Department,University of Technology-Iraq,Baghdad 10066,Iraq [2]Production Engineering and Metallurgy Department,University of Technology-Iraq,Baghdad 10066,Iraq [3]Prosthetics and Orthotics Engineering Department,College of Engineering,University of Kerbala,Kerbala 56001,Iraq [4]Prosthetics and Orthotics Engineering Department,College of Engineering and Technologies,Al-Mustaqbal University,Babylon 51001,Iraq

出　　处：《Theoretical & Applied Mechanics Letters》2024年第5期371-377,共7页力学快报（英文版）

基　　金：the AL-Mustaqbal University;the University of Technology-Iraq for their support。

摘　　要：Fatigue properties play a crucial role as they are vital to ensuring the durability and integrity of components subjected to repeated loading conditions over long periods.The main objective of this work is to investigate the fatigue behavior of dual phase low-carbon steels used in automotive applications using a rotating bending fatigue machine.Heat treatments were carried out to analyze the microstructure's effect on the fatigue properties,including quenching low-carbon steel samples at 800℃ and 900℃.Hardness and tensile tests were performed,and the microstructure was inspected to examine the constitute phases.With the assistance of a scanning electron microscope,fractographic analyses were carried out to reveal the fracture features of the samples at different lifetime ranges.The results show that various failure mechanisms occur depending on the stress levels.Additionally,the specimens quenched at 900℃ exhibited higher fatigue strength.

关 键 词：FATIGUE Dual phase Low carbon steel 

分 类 号：U465.11[一般工业技术—材料科学与工程] O346.2[机械工程—车辆工程]