Guenduez, S.Demir, B.Kacar, R.2024-09-292024-09-2920080301-92331743-2812https://doi.org/10.1179/174328107X203949https://hdl.handle.net/20.500.14619/6523A study has been made of the cold deformation aging susceptibility of dual phase steel with 14 and 22% martensite by volume. It was found that yield strength (YS) and ultimate tensile strength (UTS) increased with increasing testing temperature up to 200 degrees C and then decreased at 250 degrees C which indicated that static strain aging is dominant up to 200 degrees C. This aging is associated with free dislocations in the ferrite as a result of the austenite-martensite transformation, which become preferential sites for solute atom diffusion. At higher temperature (250 degrees C) a softening effect is dominant due to tempering of martensite. It was also observed that at a given aging temperature YS, UTS and Delta Y (increase in stress due to strain aging) increased with by volume of martensite.eninfo:eu-repo/semantics/closedAccessdual phase steelsstrain agingmartensitetensile fractureArticle10.1179/174328107X2039492-s2.0-38849137815681Q26335WOS:000253094300011Q3