MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, cilt.21, 2018 (SCI İndekslerine Giren Dergi)
Dynamic strain agmg (DSA) behaviour of hot work tool steel (H10) was investigated under as-received (AR) and as-quenched (AQ) conditions Hot tensile test was carried out m the temperatures of 25 degrees C-700 degrees C at a strain rate of 1x10(-3)s(-1) The tensile properties indicated that AQ samples showed an increase in yield strength (YS) and ultimate tensile strength (UTS) but a decrease in elongation at 200 degrees C or 300 degrees C consistent with DSA However, AR samples revealed a decrease in YS and UTS for the same testing temperatures. This indicated the presence of less amount of free C or N in solution of AR samples. Further increase in the testing temperature has increased the elongation. It is believed that DSA occurs in H10 tool steel at different temperatures because of interaction between dislocations and interstitial solute atoms (C or N) or substitutional atoms (Cr or Mo).