Showing papers by "Bhagwati Prasad Kashyap published in 1981"

On the uniqueness of stress-strain rate relation for superplastic flow of the Pb-Sn eutectic

Abstract: The uniqueness of stress-strain rate relation in superplastic deformation of the Pb-Sn eutectic alloy for different grain sizes and test temperatures has been explored after subjecting the deformation processed alloy to a standard tensile prestrain. About 30 pct elongation at 421 K was found to eliminate the mechanical and microstructural instabilities that are characteristic of the as-worked material. After this prestraining, the flow stress was uniquely dependent on strain rate for a given grain size and test temperature, irrespective of the cross head speed, the path through which a particular strain rate is achieved, or the strain.