Phase change in 080M40 plain carbon steel

Abstract

Abstract. Under shock loading conditions, mild steel undergoes a solid-solid phase transition at approximately 13GPa. In this work 080M40 plain carbon steel bright round rolled bar, was machined and heat-treated to produce an annealed or a martensitic structure. These samples were shock loaded, by plate impact, and the material response recorded using in-situ manganin stress gauges and heterodyne velocimetry. The Hugoniot stress and material characteristics both above and below the phase transition pressure have been recorded.