Assessment of total residual stress evolution and microstructure changes in pearlitic steel during wire drawing
In the present study,classical laboratory X-ray diffraction is applied in order to analyze the (residual) stress state and microstructure evolution during progressive cold drawing of pearlitic steel wire.The total residual stress,derived from {211},{222} and {310} diffraction patterns in combination with our own neutron diffraction data [1] and scanning electron microscopy have been used to characterize a selection of high strength steel filaments drawn to different reductions.The results indicated that the total residual stress could,next to the macrostress,be attributed to massive microstructural changes (related to the chemical decomposition) of the cementite phase.Moreover,the total residual stress evolutions during drawing can,independent of the {hkl},be described in terms of two distinct regimes.These are a low and a high deformation regime characterized by a monotonous and a rapidly fluctuating behavior,respectively.It was shown that the macrostress dominated the total residual stress evolution at low strain (εt = 0.6-1.8) while the physical reason for the remarkable “oscillatory” behavior at large strains is still unclear and the subject of the current discussion.
residual stress cold drawing microstructure evolution
KRI(S)KA Martin TACQ Jeroen VAN ACKER Karel SEEFELDT Marc
Catholic University of Leuven,Department of Metallurgy and Materials Engineering B-3001 Heverlee(Leuven),Belgium
国际会议
Asia Steel International conference 2012(第五届亚洲钢铁大会)
北京
英文
1-6
2012-09-23（万方平台首次上网日期，不代表论文的发表时间）