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Showing papers by "Sushanta Kumar Panigrahi published in 2016"


Journal ArticleDOI
TL;DR: In this paper, a hybrid method has been adopted to fabricate TiC-TiB2 reinforced magnesium matrix composites and the reinforcement is formed in-situ from elemental Ti and B4C powders and molten Mg-Al-Zn alloy without any addition of a third phase metal powder such as aluminum.

78 citations


Journal ArticleDOI
TL;DR: In this paper, the effect of FSP with and without pre-process thermal treatment is studied up to 3 passes and it is found that both the size of silicon particles and aluminium grains become finer with increasing FSP passes.

47 citations


Journal ArticleDOI
TL;DR: A356 is a widely used Al-Si alloy in automotive and aerospace industries for its good combination of mechanical and tribological properties as discussed by the authors, however, presence of coarse and non-uniformly distributed silicon particles greatly influence the material properties imposing great challenge to its machinability.

45 citations


Journal ArticleDOI
TL;DR: In this article, an ultrafine-grained microstructure of a QE22 alloy prepared by Friction Stir Processing (FSP) is isochronally annealed to study the thermal stability and grain growth kinetics.
Abstract: Ultrafine-grained microstructure of a QE22 alloy prepared by Friction Stir processing (FSP) is isochronally annealed to study the thermal stability and grain growth kinetics. The FSPed microstructure of QE22 alloy is thermally stable under ultrafine-grained regime up to 300 °C and the activation energy required for grain growth is found to be exceptionally high as compared to conventional ultrafine-grained magnesium alloys. The high thermal stability and activation energy of the FSPed QE22 alloy is due to Zener pinning effect from thermally stable eutectic Mg12Nd and fine precipitates Mg12Nd2Ag and solute drag effect from segregation of Neodymium (Nd) solute atoms at grain boundaries.

25 citations


Journal ArticleDOI
TL;DR: In this article, two different thermo-mechanical processing routes were employed on a cast hypo-eutectic Al Si alloy to produce wrought sheets with refined microstructure.

12 citations