Author
Sushanta Kumar Panigrahi
Other affiliations: Indian Institute of Technology Roorkee, École centrale de Nantes, Missouri University of Science and Technology ...read more
Bio: Sushanta Kumar Panigrahi is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Alloy & Microstructure. The author has an hindex of 28, co-authored 81 publications receiving 2594 citations. Previous affiliations of Sushanta Kumar Panigrahi include Indian Institute of Technology Roorkee & École centrale de Nantes.
Papers published on a yearly basis
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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
TL;DR: In this article, the effects of rolling temperature and rolling strain on the microstructural refinement of Al 6063 alloy are investigated by employing electron back scattered diffraction (EBSD) analysis, transmission electron microscope (TEM) investigations, and X-ray diffraction analysis.
70 citations
25 Mar 2011-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the effect of solutes, coarse and fine precipitates on work hardening rate and microstructure refinement of cryorolled Al 6063 alloy at different strains was investigated by employing hardness measurements, tensile tests, DSC, XRD, EBSD and TEM characterizations in the present work.
Abstract: The effect of solutes, coarse and fine precipitates on work hardening rate and microstructure refinement of cryorolled Al 6063 alloy at different strains was investigated by employing hardness measurements, tensile tests, DSC, XRD, EBSD and TEM characterizations in the present work. The presence of solute in solid solution exhibits a stronger effect on the work hardening of the materials during cryo rolling than the presence of non-coherent and coherent second phase particles. The fine precipitates are sheared and dissolved at a cryorolling strain of 2.3, while the coarse precipitates remain unaffected. The work hardening rate of solutionized material is not saturated even at a cryorolling strain of 2.3, while it is saturated at this strain for the precipitated material. The severe strain induced during plastic deformation of Al 6063 alloy produces ultrafine microstructures with improved strength and hardness. The ageing treatment of the solutionized material after cryorolling at a strain of 2.3 has improved its strength and ductility significantly as compared to precipitated materials due to the precipitation hardening and grain coarsening mechanisms, respectively.
69 citations
TL;DR: In this paper, the influence of friction stir processing on microstructure, mechanical properties and machinability of a cast Al-Si alloy was studied in the presence of FSP.
68 citations
15 Dec 2011-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the combined effect of forging and aging on microstructural evolution and mechanical properties of a Mg-Y-RE alloy was studied by employing hardness measurements, tensile tests, optical microscopy, scanning electron microscopy (SEM), and electron back scattered diffraction (EBSD) analysis.
Abstract: The combined effect of forging and aging on microstructural evolution and mechanical properties of a Mg–Y–RE alloy was studied in the present work by employing hardness measurements, tensile tests, optical microscopy (OM), scanning electron microscopy (SEM) and electron back scattered diffraction (EBSD) analysis. The -F temper treated bulk Mg–Y–RE alloy samples were subjected to forging for microstructural refinement and subsequent aging to maximize the strength-ductility combination. The forged samples combined with peak aging treatment (60 h at 180 °C) exhibited an excellent combination of high strength (388 MPa) and high ductility (23%). The combined effect of grain refinement, work hardening, precipitation strengthening and recovery is responsible for the simultaneous improvement of both strength and ductility. A comparative study of age hardening response of forged samples and as received samples showed higher hardenability in forged samples.
66 citations
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TL;DR: A brief overview of the available SPD technologies is given in this paper, along with a summary of unusual mechanical, physical and other properties achievable by SPD processing, as well as the challenges this research is facing, some of them generic and some specific to the nanoSPD area.
1,451 citations
TL;DR: In this article, the relationship between precipitation phenomena, grain size and mechanical behavior in a complex precipitation-strengthened alloy system, Al 7075 alloy, a commonly used aluminum alloy, was selected as a model system in the present study.
995 citations
10 Jan 2013-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the relationship between microstructural features, mechanical, chemical, and physical properties, as well as the innovation potential of the SPD-produced nanostructured Al alloys are discussed.
Abstract: In recent years, much progress has been made in the studies of nanostructured Al alloys for advanced structural and functional use associated both with the development of novel routes for the fabrication of bulk nanostructured materials using severe plastic deformation (SPD) techniques and with investigation of fundamental mechanisms leading to improved properties. This review paper discusses new concepts and principles in application of SPD processing to fabricate bulk nanostructured Al alloys with advanced properties. Special emphasis is placed on the relationship between microstructural features, mechanical, chemical, and physical properties, as well as the innovation potential of the SPD-produced nanostructured Al alloys.
455 citations
TL;DR: In this article, the effects of different alloying elements on the microstructure and mechanical properties are described considering their strengthening mechanisms, e.g. grain refinement, precipitation and texture hardening effect.
439 citations
TL;DR: A comprehensive review of surface composites via friction stir processing is presented in this article, where the underlying mechanisms in strengthening of FSP-processed surface composite are discussed with reported models.
408 citations