Abstract
Grade A steel was processed using equal channel angular pressing (ECAP). 1 pass ECAP did not cause considerable decrease in the grain size of the steel. It brought about two different microstructures on flow and transverse planes of the ECAP billet, instead. Microstructure consists of elongated ferrite and perlite grains aligned in a direction having mainly 45° angle with the extrusion direction on the flow plane while nearly equiaxed grains were formed on the transverse plane. These differences between the microstructures of two different planes of the ECAP sample is attributed to the share planes that operative during ECAP. ECAP increased hardness and strength values of the steel significantly due to the increase in the dislocation density during the process. However, it decreased elongation to failure considerably. It was found that impact energy of the ECAP-processed sample is dependent on the notch position of the Charpy impact test sample
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