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
Papers
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TL;DR: In this article, the safe processing zone for both base and in-situ composite at all heat treatment conditions have been established through processing map based on dynamic materials model (DMM) by conducting hot compression tests at various temperatures and strain rates.
47 citations
TL;DR: In this paper, the development of high entropy alloys (HEAs) using direct laser deposition (DLD) technique was investigated, and microstructures, mechanical (mainly hardness) and cyclic oxidation behaviors at 1100 C of developed HEAs have been investigated.
Abstract: High entropy alloys (HEAs) are being explored as prospective substitutes for high temperature structural components. These HEAs are typically fabricated using conventional techniques like arc melting, mechanical alloying etc., but these routes exhibit a wide range of limitations. Direct laser deposition (DLD) process (an additive manufacturing technique) generates complex products from metal powder by selectively melting alloy powder in successive layers. The present study shows the development of HEAs namely Al0.3CoCrFeNi, Al0.7CoCrFeNi possessing crystal structures face-centered cubic (FCC) and FCC plus body-centered cubic (BCC) respectively using direct laser deposition (DLD) technique. HEA plates of the above-mentioned alloys were fabricated using DLD technique. In the present work, microstructures, mechanical (mainly hardness) and cyclic oxidation behaviors at 1100 Cof developed HEAs have been investigated. Microstructural studies revealed FCC and FCC + BCC structures respectively, for Al0.3CoCrFeNi and Al0.7CoCrFeNi alloys with corresponding hardness of 170HV and 380HV. Cyclic oxidation studies were performed on the HEAs at a temperature of 1100 °C for 200 h. Both the HEAs displayed quasi parabolic oxide growth after an initial sharp growth slope. Over the studied oxidation period, the mass gain for HEA Al0.3CoCrFeNi was greater than for Al0.7CoCrFeNi. Each oxidized HEAs forms an external Cr2O3 scale with Al2O3 subscale formed beneath, but the thickness and continuity of oxide layers vary according to Al content. Increased Al content enhanced the oxidation resistance of the HEA.
46 citations
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
43 citations
TL;DR: The microstructure, mechanical properties and fracture behavior of an as-received QE22 alloy have been investigated under different thermal conditions, including solution treated (ST), under aged (UA), peak aged (PA) and over aged (OA) conditions as mentioned in this paper.
42 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