A Mechanism for Static and Dynamic Recovery
暂无分享,去创建一个
The dislocation structure produced during deformation at low and intermediate temperatures is described by a statistical distribution of segments under varying driving forces and resistances to rearrangement. Thermal activation of the metastable positions leads to jerky recovery, which is exhaustive when static, but occurs at a steady rate when dynamic. Static and dynamic recovery thus follow the same laws, albeit at vastly different rates, and they lead to similar dislocation structures. Realistic strain-hardening laws are compatible with this mechamism, in particular with their mild dependence on stress and strain rate.
[1] U. F. Kocks. Laws for Work-Hardening and Low-Temperature Creep , 1976 .
[2] J. Hausselt,et al. Dynamic recovery during and after steady state deformation of Al-11wt%Zn , 1976 .
[3] U. F. Kocks. A statistical theory of flow stress and work-hardening , 1966 .
[4] T. H. Blewitt. Deformation of Copper Single Crystals at 300°K and 78°K , 1953 .