Thermal stability and strain rate sensitivity of ultrafine-grained(UFG)Fe produced by severe plastic deformation(SPD)were investigated.The UFG Fe was processed by equal-channel angular pressing(ECAP)via route Bc.After 6 passes,the grain size of UFG Fe reaches 600 nm, as confirmed by means of electron back scatter diffraction(EBSD).Examination of micro-hardness and grain size of UFG Fe as a function of post-ECAP annealing temperature shows a transition from recovery to recrystallization.The critical trans...
Fuping Yuan,~(a) Ping Jiang,~(b) and Xiaolei Wu~(c) State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics Chinese Academy of Science, Beijing 100190,China
