K. Dash
Indian Institute of Technology Madras
Composite numberFabricationDeformation (engineering)Composite materialThermal shockFlexural strengthMetallurgyMaterials scienceThermalScanning electron microscopeSpark plasma sinteringSinteringMetal matrix compositeFractographyThermal expansionCopperDuctilityPowder metallurgyShock (mechanics)MicrostructureNanocomposite
31Publications
6H-index
193Citations
Publications 27
Newest
#1K. Dash (Indian Institute of Technology Madras)H-Index: 6
#2Apurv Dash (Forschungszentrum Jülich)H-Index: 6
Abstract We have explored to fabricate Cu based Ti2AlC composite focusing on the processing method and the reaction which takes place at the matrix-reinforcement interface to yield 2D TiCx. In due course of consolidation of Cu-Ti2AlC; the formation of 2D TiCx via the reaction between Cu and Ti2AlC by forming solid solution between CuAlx was facilitated. This reaction has been elaborated and analyzed in the light of corroborated results.
1 CitationsSource
#1Abhishek Pariyar (IISc: Indian Institute of Science)H-Index: 2
#2Chandra S. Perugu (IISc: Indian Institute of Science)H-Index: 7
Last. Satish V. Kailas (IISc: Indian Institute of Science)H-Index: 32
view all 4 authors...
Abstract A powder blend of Ni particles embedded in Al flakes obtained after high energy ball milling was used to reinforce an Al Mg alloy using friction stir processing (FSP). The mechanical activation provided by both ball milling and FSP resulted in the in-situ formation of nickel aluminides during FSP, which was distributed throughout the nugget zone. The average grain size after FSP was 8.3 μm. High dislocation density was observed in the vicinity of the reinforcements. The yield and ultima...
1 CitationsSource
#1K. Dash (IISc: Indian Institute of Science)H-Index: 6
#2K.U. Yazar (IISc: Indian Institute of Science)H-Index: 4
Last. Satyam Suwas (IISc: Indian Institute of Science)H-Index: 43
view all 4 authors...
Abstract In this investigation we report the formation of a graded microstructure in copper/tantalum ultrafine grained (UFG) multi-layered composite fabricated by cross accumulative roll bonding (CARB) process at high temperatures. The microstructure, micro-texture and bulk texture evolution in the copper/tantalum composite was established. A gradient microstructure develops along the thickness of the specimen during the CARB process. The fragmentation of tantalum in between copper layers and th...
Source
#1Apurv Dash (Forschungszentrum Jülich)H-Index: 6
#2Jürgen Malzbender (Forschungszentrum Jülich)H-Index: 47
Last. Jesus Gonzalez‐Julian (Forschungszentrum Jülich)H-Index: 2
view all 7 authors...
5 CitationsSource
#1K. Dash (IISc: Indian Institute of Science)H-Index: 6
#2Kamanio Chattopadhyay (IISc: Indian Institute of Science)H-Index: 45
Last. Satyam Suwas (IISc: Indian Institute of Science)H-Index: 43
view all 4 authors...
In this investigation we report the formation of a graded microstructure in copper/tantalum ultrafine grained (UFG) multi-layered composite fabricated by cross accumulative roll bonding (CARB) process at high temperatures. The gradient microstructure develops as a consequence of the strain gradient present along the thickness of the specimen during the CARB process. The correlation of strain gradient with the microstructure, micro-texture and bulk texture in copper/tantalum composite was establi...
Source
#1G. Wu (University of Oxford)H-Index: 2
#2K. Dash (University of Oxford)H-Index: 6
Last. K. A. Q. O’Reilly (University of Oxford)H-Index: 18
view all 4 authors...
Abstract This unique investigation explores the nature and chemistry of the oxides on Al-Cu alloys in the liquid state and conducts thermodynamic simulations and kinetic studies of the oxidation process. The morphology, microstructural evolution and chemistry of the oxides were explained over different time intervals. Thermodynamic simulations were performed to explain the formation and stability of oxides in the Al-5Cu alloy; the oxidation mechanism was discussed and compared to that of pure Al...
2 CitationsSource
#1G. Wu (University of Oxford)H-Index: 2
#2K. Dash (University of Oxford)H-Index: 6
Last. K. A. Q. O’Reilly (University of Oxford)H-Index: 18
view all 4 authors...
The oxidation behaviour of molten Al-Mg alloys has been investigated. The oxides formed were extracted from the alloys using a novel extraction method and the oxidation mechanisms are discussed with reference to the growth behaviour of the oxides. The oxides formed in Al-Mg alloys were explored by scanning electron microscopy, X-ray diffraction and photoelectron spectroscopy. Thermodynamic calculations were performed to predict the feasibility of the reactions giving rise to oxides and to explai...
13 CitationsSource
#1Zuzanka Trojanová (Charles University in Prague)H-Index: 21
#2K. Dash (Charles University in Prague)H-Index: 6
Last. Alla Kasakewitsch (TUC: Clausthal University of Technology)H-Index: 2
view all 5 authors...
Pure microcrystalline magnesium (µMg) was reinforced with hexagonal boron nitride (hBN) nanoparticles and was fabricated by powder metallurgy process followed by hot extrusion. For comparison pure magnesium powder was consolidated by hot extrusion too. Both materials exhibited a significant fiber texture. Mg-hBN nanocomposites (nc) and pure Mg specimens were deformed between room temperature and 300 °C under tension and compression mode. The yield strength and ultimate tensile and compression st...
3 CitationsSource
#1K. Dash (IISc: Indian Institute of Science)H-Index: 6
#2Bankim Chandra Ray (NITR: National Institute of Technology, Rourkela)H-Index: 27
The focus of this work is to highlight the relative response of Al-based micro- and nanocomposites in the form of enhancement in flexural strength via induced thermal stresses at high and cryogenic temperatures in ex situ and in situ atmospheres. In this investigation, we have tried to explore the reliability, matrix-reinforcement interaction and microstructural integrity of these materials in their service period by designing appropriate heat treatment regimes. Al-Al2O3 micro- and nanocomposite...
Source
#1Zdeněk Drozd (Charles University in Prague)H-Index: 8
#2Zuzanka Trojanová (Charles University in Prague)H-Index: 21
Last. K. Dash (IISc: Indian Institute of Science)H-Index: 6
view all 5 authors...
Magnesium nanocomposites reinforced with 3 vol.% of hexagonal boron nitride (hBN) and ultrafine-grained magnesium with 3 vol.% of graphite (Gr) nanoparticles were prepared by milling followed by hot extrusion. The influence of the hBN and Gr nanoparticles on the mechanical and physical properties of magnesium were subsequently investigated. The microstructure of the nanocomposites was analysed by electron microscopy. The nanocomposites were deformed in compression over a wide temperature range f...
1 CitationsSource