Effect of pre-strain on ratcheting behavior of A668 Class D steel

5th National Conference on Processing and Characterization of Materials

Tripathy, S.^1 ; Mondal, A.K.^1 ; Dutta, K.^1

Department of Metallurgical and Materials Engineering, National Institute of Technology, Rourkela

769008, India^1

关键词: Class-D;    Cyclic hardening;    Cylindrical specimens;    Gauge length;    Heat treatment conditions;    Pre-strain;    Strain accumulations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/115/1/012037/pdf
DOI  :  10.1088/1757-899X/115/1/012037

来源: IOP

【 摘 要 】

The aim of this investigation is to study the effect pre-strain (0%, 2%, 4% and 8%) on ratcheting behavior of ASTM A668 Class D steel in different heat treatment conditions (normalized and hardened-tempered). Ratcheting tests were carried out at room temperature on cylindrical specimens having 12.5 mm gauge length and 6 mm gauge diameter. The results include reduced strain accumulation with increasing prestrain level due to work hardening of the pre-strained samples. Further, cyclic hardening takes place during ratcheting deformation.