Tastemur, DemetGunduz, Suleyman2024-09-292024-09-2920211300-18841304-4915https://doi.org/10.17341/gazimmfd.630497https://search.trdizin.gov.tr/tr/yayin/detay/1138868https://hdl.handle.net/20.500.14619/6870In this study microstructure and mechanical properties of AISI H10 hot work tool steel austenitised at 1050 degrees C for 1 hour and then cooled in water followed by tempering at 550 degrees C for different time intervals were investigated. In addition, the dynamic strain aging behavior of the samples tempered at 550 degrees C for 2 hours, where optimum parameters were obtained, was investigated. In the aging process, tensile tests were carried out at a temperature range of 25-700 degrees C and at a strain rate of 1x10(-3) s(-1). SEM analyzes were performed on the fractured samples after the tensile test in order to determine the effect of dynamic strain ageing on fracture behavior. The tensile test results indicated that tempered samples showed an increase in yield strength (YS) and ultimate tensile strength (UTS) but elongation remained constant at 200 degrees C or 300 degrees C consistent with dynamic strain aging. It is believed that dynamic strain ageing occurs in AISI H10 hot work tool steel at different temperatures because of interaction between dislocations and interstitial solute atoms (C or N) or substitutional atoms (Cr or Mo).trinfo:eu-repo/semantics/openAccessHot work tool steelsdynamic strain agingmechanical propertiesArticle10.17341/gazimmfd.6304972-s2.0-8510753660213973Q21388113886836WOS:000655278700016Q4