Superplasticity denotes the ability of a limited number materials to achieve exceptionally high tensile elongations at least 400%. Experiments show that Al-Mg-Sc alloys provide excellent capabilities for achieving superplastic flow and also they can be formed easily in biaxial forming operations. It is important, therefore, examine mechanism when alloy prepared using different procedures. This ...

Inconel 718 was successfully processed by multi-pass high-pressure sliding (MP-HPS) for production of ultrafine-grained structures in rods with upsized dimensions. An (UFG) structure an average grain size ~ 140 nm developed through rotation 45°. Tensile testing at 1073 K initial strain rate 2x10-2 s−1 led to superplastic elongations more than 400%. A relation is established between hardness and...