Şen, NuriDurucan, GökhanElkoca, OktayUygur, İlyas2020-04-302020-04-3020190301-92331743-2812https://doi.org/10.1080/03019233.2019.1683699https://hdl.handle.net/20.500.12684/3667ELKOCA, OKTAY/0000-0002-0007-0741WOS: 000494015900001This paper presents an experimental study on the mechanical properties of ultra-high-strength steels at elevated temperatures. Tensile tests were carried out at 300-600 degrees C on Docol 1200M and Docol 1400M steel samples. The results indicate that as the temperature increases Young's Modulus, yield strength (YS) and ultimate tensile strength (UTS) display a decrease. YS/UTS ratios at 300 degrees C are lower than those at room temperature, they make peaks at 400 and 500 degrees C for Docol 1400M and Docol 1200M, respectively, and then decrease again beyond those temperatures. While total elongation continuously increases, uniform elongation slightly decreases with increasing temperature. Present carbides in tempered matrix continue to grow and new carbides are observed at the grain boundaries. Considering all roll forming parameters, 300 degrees C seems the most convenient temperature for warm forming. In this sense, the warm roll forming has a potential for forming complex-shaped parts by reconciling strength with formability.en10.1080/03019233.2019.1683699info:eu-repo/semantics/closedAccessUltra-high-strength steelsmartensitic steelsroll formingwarm formingArticle4610944952WOS:000494015900001Q2Q3