Y. V. R. K. Prasad

TL;DR: In this article, a new method of modeling material behavior which accounts for the dynamic metallurgical processes occurring during hot deformation is presented, which considers the workpiece as a dissipator of power in the total processing system and evaluates the dissipated power co-contentJ = ∫o σ e ⋅dσ from the constitutive equation relating the strain rate (e) to the flow stress (σ).

TL;DR: In this paper, a processing map has been developed on the basis of flow stress data as a function of temperature, strain rate and strain, which is used for obtaining processing windows and achieving microstructural control during hot working.

TL;DR: In this paper, the grain size of IN 718 hot forged superalloy was predicted in the MDRx regime using compression tests on process annealed material, with a view to obtain a correlation between grain size and the process parameters.

TL;DR: The hot deformation behavior of ELI grade Ti-6Al-4V alloy with Widmanstatten preform microstructure over wide temperature (750-1100oC) and strain rate ranges (0.001-100 s−1) has been studied with the help of processing maps as discussed by the authors.

TL;DR: In this paper, the authors evaluated the hot deformation characteristics of equiaxed (α+β) preform of Ti-6Al-4V in two oxygen grades viz., commercial grade and extra-low interstitial (ELI) grade.