Achieving superplasticity in hard-to-deform metallic materials using high-pressure sliding (HPS) process

Abstract. This presentation shows that superplasticity is achieved in hard-to-deform materials when they are processed by severe plastic deformation (SPD) through high-pressure sliding (HPS). The HPS process similar to the torsion (HPT) as straining made under high pressure highly constrained conditions. It applicable a sheet form of samples while HPT uses disks or rings, and thus it has advantage sample size can be increased. In addition, combined with feeding process, SPD-processed area further enlarged without increasing machine capacity, which called incremental (IF-HPS). applied Ni-based superalloy (Inconel 718), Ti-6Al-7Nb alloy (F1295) Mg-6Al-1Zn (AZ61), well attained all alloys total elongations more than 400%. also demonstrated cup forming Inconel 718 practical dimensions realized application IF-HPS process.