Development of Ultra-Fine Grained Ti and Ti-6Al-4V Alloy by Equal Channel Angular Extrusion

摘要

This report covers efforts to use equal-channel angular extrusion (ECAE) to produce a fine-grained structure in Ti and Ti-6Al-4V. Both materials were successfully produced. Details of processing and resulting microstructures (phase morphology, grain size, texture, dislocation and twin substructures) are presented and discussed. Ti alloys are a mixture of hexagonal-close-packed and body-centered-cubic crystal structures. Plastic deformation is accommodated by a mixture of dislocation motion and twinning.