Dynamic re-crystallization (DRX) is one of the most efficient methods to achieve ultra-fine ferrite grain
in the steel. The DRX associated with the formation of new grains in hot working condition. The factors influencing the
grain size achievable through thermo-mechanical controlled processing are known to be work hardening and softening
by dynamic process of recovery. The point at which the combine effect of strain hardening and recovery are unable to
accommodate more immobile dislocation is the starting point of DRX process. In present investigation, critical stress for
initiation of DRX is calculated for 0.05C-1.52Cu-1.51Mn steel and the influence of strain rate and temperature is studied.
It was observed that at lower strain rate, critical stress for initiation of Dynamic re-crystallization (DRX) is increases
initially and then it become saturated at higher strain rate. It is also absorbed that higher temperature and lower strain
rates are the favourable condition for typical DRX