Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Phase evolution in AlxCoCrFeNi (x= 0, 0.3, 0.6, 1 mole) high entropy alloys synthesized by mechanical alloying and spark plasma sintering

Bhattacharya, Rahul LU (2014) National Metallurgist Day Annual Technical Meeting 2014 Pune India p.361-361
Abstract
AlxCoCrFeNi (x=0,0.3,0.6,1 mole) high entropy alloys with multiprincipal elements and varying Al content were synthesized through mechanical alloying. Elemental blends of CoCrFeNi, Al0.3CoCrFeNi, Al0.6CoCrFeNi and AlCoCrFeNi powders were subjected to high energy ball milling in Fritsch Pulverisette P-5 until the formation of solid solution. The as-milled HEA powders having grain sizes of around 10 nm were consolidated by spark plasma sintering to obtain pellets of very high relative density without significant grain growth. Characterization of milled powders and consolidated pellets has been done by X ray diffraction, scanning electron microscopy, transmission electron microscopy and differential scanning calorimetry. The quaternary alloy... (More)
AlxCoCrFeNi (x=0,0.3,0.6,1 mole) high entropy alloys with multiprincipal elements and varying Al content were synthesized through mechanical alloying. Elemental blends of CoCrFeNi, Al0.3CoCrFeNi, Al0.6CoCrFeNi and AlCoCrFeNi powders were subjected to high energy ball milling in Fritsch Pulverisette P-5 until the formation of solid solution. The as-milled HEA powders having grain sizes of around 10 nm were consolidated by spark plasma sintering to obtain pellets of very high relative density without significant grain growth. Characterization of milled powders and consolidated pellets has been done by X ray diffraction, scanning electron microscopy, transmission electron microscopy and differential scanning calorimetry. The quaternary alloy showed an FCC phase, while the quinary alloy showed a BCC phase, indicating the stabilization of BCC phase with the addition of Al. Variation in Vickers hardness between the sintered samples was correlated to the presence of FCC and/or BCC phases present after SPS. Phase and microstructural evolution during mechanical alloying and after spark plasma sintering has been investigated and the differences have been correlated with the Al content of the alloy. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to conference
publication status
published
subject
keywords
High entropy alloys, oxidation behaviour, Mechanical alloying, Spark plasma sintering, High resolution transmission electron microscopy, Scanning electron microscope (SEM), X ray diffraction, EDS, EBSD, Scanning Transmission Electron Microscopy, GDOES, Powder metallurgy (PM), Physical Metallugy, Thermodynamics and kinetics, Sintering, Microstructural evolution, Mechanical properties, Annealing, Heat treatment, Casting, Furnace control, CALPHAD
pages
1 pages
conference name
National Metallurgist Day Annual Technical Meeting 2014 Pune India
conference location
Pune, India
conference dates
2014-11-12 - 2014-11-15
language
English
LU publication?
no
id
dcbb1e47-3394-4c11-a396-2c5747bcfe1a
date added to LUP
2025-09-23 20:15:14
date last changed
2025-10-07 13:11:31
@misc{dcbb1e47-3394-4c11-a396-2c5747bcfe1a,
  abstract     = {{AlxCoCrFeNi (x=0,0.3,0.6,1 mole) high entropy alloys with multiprincipal elements and varying Al content were synthesized through mechanical alloying. Elemental blends of CoCrFeNi, Al0.3CoCrFeNi, Al0.6CoCrFeNi and AlCoCrFeNi powders were subjected to high energy ball milling in Fritsch Pulverisette P-5 until the formation of solid solution. The as-milled HEA powders having grain sizes of around 10 nm were consolidated by spark plasma sintering to obtain pellets of very high relative density without significant grain growth. Characterization of milled powders and consolidated pellets has been done by X ray diffraction, scanning electron microscopy, transmission electron microscopy and differential scanning calorimetry. The quaternary alloy showed an FCC phase, while the quinary alloy showed a BCC phase, indicating the stabilization of BCC phase with the addition of Al. Variation in Vickers hardness between the sintered samples was correlated to the presence of FCC and/or BCC phases present after SPS. Phase and microstructural evolution during mechanical alloying and after spark plasma sintering has been investigated and the differences have been correlated with the Al content of the alloy.}},
  author       = {{Bhattacharya, Rahul}},
  keywords     = {{High entropy alloys; oxidation behaviour; Mechanical alloying; Spark plasma sintering; High resolution transmission electron microscopy; Scanning electron microscope (SEM); X ray diffraction; EDS; EBSD; Scanning Transmission Electron Microscopy; GDOES; Powder metallurgy (PM); Physical Metallugy; Thermodynamics and kinetics; Sintering; Microstructural evolution; Mechanical properties; Annealing; Heat treatment; Casting; Furnace control; CALPHAD}},
  language     = {{eng}},
  pages        = {{361--361}},
  title        = {{Phase evolution in AlxCoCrFeNi (x= 0, 0.3, 0.6, 1 mole) high entropy alloys synthesized by mechanical alloying and spark plasma sintering}},
  year         = {{2014}},
}