Modeling of flow stress of 42CrMo steel under hot compression
The compressive deformation behavior of 42CrMo steel was investigated at the temperatures from 850℃ to 1150℃ and strain rates from 0.01s-1 to 50s-1 on Gleeble-1500 thermo-simulation machine. The results show that the true stress–true strain curves exhibit peak stresses at small strains, then the flow stresses decrease monotonically until high strains, showing a dynamic flow softening. The stress level decreases with increasing deformation temperature and decreasing strain rate, which can be represented by a Zener-Hollomon parameter in an exponent-type equation. A revised model describing the relationships of the flow stress, strain rate and temperature of the 42CrMo steel at elevated temperatures is proposed by compensation of strain. The stress–strain relations of 42CrMo steel predicted by the proposed models agree well with experimental results.
42CrMo steel hot compression deformation flow stress constitutive equation
Y.C.Lin Ming-Song Chen Jue Zhong
School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）