上清充通大￥ Recovery SHEAMGHAI DUD TONO UHTVEREETTY Recovery kinetics The extent of the recovery(R)was defined in terms of the yield stress of the recovered crystals(o),the yield stress of the as-deformed crystal (om) and the yield stress of the undeformed crystal (oo)as R=(on-o,)/(On-Go) The relationship between the amount of recovery,time and temperature was found,over a wide range of conditions to be R=c Int- kT 里30 The amount of work hardening which is 20 recovered in 3hrs at room temperature in Cu- Al203 crystals oriented for single slip,and deformed at 77K,(Humphreys and Hirsch 1976). 0.05 0.0 0.15 Shear Strain Institute of Forming Technology Equipment 14Recovery Institute of Forming Technology & Equipment 14 Recovery kinetics R    mr m     0  The extent of the recovery (R) was defined in terms of the yield stress of the recovered crystals (σ), the yield stress of the as‐deformed crystal (σm) and the yield stress of the undeformed crystal (σ0) as The relationship between the amount of recovery, time and temperature was found, over a wide range of conditions to be 1 ln Q Rc t kT   The amount of work hardening which is recovered in 3hrs at room temperature in Cu– Al2O3 crystals oriented for single slip, and deformed at 77K, (Humphreys and Hirsch 1976)