Abstract

ABSTRACTThe performance of steels depends on the properties associated with theirmicrostructures, that is type, volume fraction, form factor, size and the area distributionof the various phases involved. Because all the phases in steels are crystalline, steelmicrostructures are made up of various crystals, sometimes as many as three or fourdifferent types which are physically blended by solidification, solid-state phase changes,hot deformation, cold deformation and heat treatment. Each type of microstructure isdeveloped to characteristic property ranges by specific processing routes that controlthe microstructural changes. Thus processing technologies are used to tailor the finalmicrostructure.In this study boron added armor steel has been rolled to form sheet product.Austenitization treatment, rapidly quenching and then tempering at varioustemperatures and times have been performed on the materials respectively. After all ofthese operations, the phases of the alloy system formed during equilibrium state havebeen examined and also their amounts are calculated with Thermocalc. Microstructuresformed after different heat treatments have been examined by optical microscopy. Theeffect of formed microstructures on mechanical properties are comparatively given bystrength, toughness and elongation values.

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