To cite this version:E. Cepus, C. Liu, M. Bassim. The effect of Microstructure on the mechanical properties and adiabatic shear band formation in a medium carbon steel. Journal de Physique IV Colloque, 1994, 04 (C8) On a observé que la ferrite se déforme préférentiellement par rapport aux autres composants dans la microstructure. Aussi, quand la ferrite est uniforme, les bandes de cisaillement adiabatique sont aussi uniformes. Mais, quand la ferrite est ségrégée, les bandes de cissaillement observées sont plutôt granulaires.
AbstractUsing a torsional split-Hopkinson bar, high strain rate tests in the order of 1000 s"l were conducted on 5 different heat treatments of a medium carbon steel. The heat treatments were; as received, fully annealed and air cooled and quench tempered at 315, 480 and 650 °C, each for 1 hour. The microstructures obtained were coarse pearlite, unresolved pearlite in a ferrite matrix and three different tempers of martensite. It was found that ferrite in the microstructures would always deform preferentially over any other phase present in the material. In addition, if the ferrite was uniformly distributed, the ASB would be uniformly deformed. However, when it was segregated, granular type shear band surfaces would be observed.
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