Nano-crystalline high entropy alloys prepared by mechanical alloying

Kumar, Anil; Aravind, Arun; Chandrakar, Rituraj; Rao, K. Raja; Chopkar, Manoj

doi:10.1016/j.matpr.2020.02.323

Cited by 6 publications

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These typical bottom-up processes help to avoid or reduce metal removal processes and thereby significantly reduce manufacturing costs. The following methods are widely used to produce powders: mechanical alloying (MA) [18][19][20][21][22], self-propagating high-temperature synthesis [23][24][25], and gas and plasma atomization [26,27].…”

Section: Introductionmentioning

confidence: 99%

Fabrication, Microstructure, and Physico-Mechanical Properties of Fe–Cr–Ni–Mo–W High-Entropy Alloys from Elemental Powders

Ivannikov

Grebennikov

Klychevskikh

et al. 2022

Metals

View full text Add to dashboard Cite

In this work, 35Fe30Cr20Ni10Mo5W (wt.%) and 30Fe30Cr20Ni10Mo10W (wt.%) high-entropy alloys were fabricated using a powder metallurgy route. Powder mixtures for a hot-pressure process were obtained by the mixing and mechanical alloying of elemental powders. Mechanical alloying was carried out for 1, 2.5, 5, and 10 h. X-ray phase analysis of the powder mixtures showed that with increasing time of mechanical alloying, Face-Centered Cubic (FCC), Body-Centered Cubic (BCC), and nickel–iron intermetallic phases were formed in the structure, and the volume content of molybdenum and tungsten decreased. The hot-pressing was carried out at a pressure of 30 MPa and a temperature of 1200 °C for 30 min. The maximum densities of 8.14 ± 0.02 and 8.40 ± 0.01 g/cm3 and compressive strengths of 2430 ± 30 MPa and 2460 ± 35 MPa for consolidated materials were achieved using powder mixtures after 10 h of mechanical milling, for compositions with 5 wt.% W and 10 wt.% W, respectively. The workpieces fabricated with a pressure-assisted sintering process from milled powders were found to consist of FCC, BCC, and sigma phases.

show abstract

Section: Introductionmentioning

confidence: 99%

Fabrication, Microstructure, and Physico-Mechanical Properties of Fe–Cr–Ni–Mo–W High-Entropy Alloys from Elemental Powders

Ivannikov

Grebennikov

Klychevskikh

et al. 2022

Metals

View full text Add to dashboard Cite

show abstract

“…There are a variety of processing routes for the synthesis of HEAs, which can be categorized into four different classes of routes including fabrication from (1) liquid state, (2) solid-state, (3) and gas state, and (4) fabrication through electrochemical process [2,7]. Mechanical alloying (MA) is well-known as a solid-state and non-equilibrium fabrication method that can facilitate the formation of a metastable phase and was widely used for the fabrication of nanocrystalline materials and HEAs [8][9][10][11]. Recently, Varalakshmi et al [12] used MA method to produce nanostructured equiatomic high entropy solid solutions from binary to hexanary compositions in AlFeTiCrZnCu system with a simple BCC crystalline structure.…”

Section: Introductionmentioning

confidence: 99%

Effects of Process Control Agent Amount, Milling Time, and Annealing Heat Treatment on the Microstructure of AlCrCuFeNi High-Entropy Alloy Synthesized through Mechanical Alloying

Yazdani

Toroghinejad

Shabani

et al. 2021

Metals

View full text Add to dashboard Cite

This study was conducted to investigate the characteristics of the AlCrCuFeNi high-entropy alloy (HEA) synthesized through mechanical alloying (MA). In addition, effects of Process Control Agent (PCA) amount and milling time were investigated using X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). The results indicated that the synthesized AlCrCuFeNi alloy is a dual phase (FCC + BCC) HEA and the formation of the phases is strongly affected by the PCA amount. A high amount of PCA postponed the alloying process and prevented solid solution formation. Furthermore, with an increase in the PCA amount, lattice strain decreased, crystallite size increased, and the morphology of the mechanically alloyed particles changed from spherical to a plate-like shape. Additionally, investigation of thermal properties and annealing behavior at different temperatures revealed no phase transformation up to 400 °C; however, the amount of the phases changed. By increasing the temperature to 600 °C, a sigma phase (σ) and a B2-ordered solid solution formed; moreover, at 800 °C, the FCC phase decomposed into two different FCC phases.

show abstract

Synthesis of FeCrCoNiCu high entropy alloy through mechanical alloying and spark plasma sintering processes

Toroghinejad

Pirmoradian

Shabani

2022

Materials Chemistry and Physics

View full text Add to dashboard Cite

Nano-crystalline high entropy alloys prepared by mechanical alloying

Cited by 6 publications

References 12 publications

Fabrication, Microstructure, and Physico-Mechanical Properties of Fe–Cr–Ni–Mo–W High-Entropy Alloys from Elemental Powders

Fabrication, Microstructure, and Physico-Mechanical Properties of Fe–Cr–Ni–Mo–W High-Entropy Alloys from Elemental Powders

Effects of Process Control Agent Amount, Milling Time, and Annealing Heat Treatment on the Microstructure of AlCrCuFeNi High-Entropy Alloy Synthesized through Mechanical Alloying

Synthesis of FeCrCoNiCu high entropy alloy through mechanical alloying and spark plasma sintering processes

Contact Info

Product

Resources

About