Effect of silicon addition on alcocrfeni high entropy alloys prepared by vacuum arc melting

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

doi:10.1063/5.0003829

Cited by 5 publications

(2 citation statements)

References 18 publications

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“…On the other hand, Si is considered a BCC stabiliser and it plays a significant role in promoting the BCC phase. It is therefore assumed that the addition of Si affects the lattice distortion and changes the structure to relax the lattice distortion energy which leads to the BCC formation [29]. In addition, a more negative enthalpy of mixing also promotes the BCC phase formation [30].…”

Section: Resultsmentioning

confidence: 99%

Surface morphology transformation and densification behaviour of conventionally sintered AlFeCoNiSi high entropy alloys

et al. 2023

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A preliminary study has been performed to understand the effect of pressureless sintering on the surface morphology of the AlFeCoNi alloy by the addition of the Si element. This study aims to determine the possibility of achieving the densification of high entropy alloy using the conventional sintering technique. The results indicate that the HEAs have a single-phase BCC structure even with the addition of Si. The thermodynamic simulation (CALPHAD) was used to predict the phase formation. The variation of crystallite sizes and lattice strains caused by sintering temperatures was also discussed. In addition, densification mechanisms occurring with the different sintering temperatures have been discussed. The formation of porosity was observed, however, the density of HEAs improved with increasing sintering temperature. Ultimately, it was suggested that the present HEAs required higher sintering temperatures and a longer time to achieve high density.

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Section: Resultsmentioning

confidence: 99%

Surface morphology transformation and densification behaviour of conventionally sintered AlFeCoNiSi high entropy alloys

et al. 2023

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“…Be enhances stiffness and strength and has a low atomic weight of 9 g mol −1 and a relatively high melting point of 1287 °C [35]. Si promotes formation of BCC phase [36]. Its incorporation into alloy formulations is attributed to its capacity to improve corrosion resistance by facilitating the formation of a protective oxide layer on the surface, thus mitigating the potential for metal corrosion.…”

Section: Hea Powder Synthesismentioning

confidence: 99%

Electrochemical and hot corrosion analysis of novel AlBeSiTiV light weight HEA coating on SS316

Kishan,

Sree,

Akhil

et al. 2024

Phys. Scr.

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In the realm of advanced materials research, high entropy alloys (HEAs) have emerged as a dynamic and rapidly evolving field, their potential can be further harnessed by developing HEA coatings on specific substrate materials. In this study, equiatomic AlBeSiTiV lightweight HEA (LWHEA) was successfully synthesized through the precise technique of mechanical alloying (MA). Subsequently, this innovative HEA coating was applied to the SS316 substrate using atmospheric plasma spray (APS). The microstructure of the synthesized HEA revealed a prominent FCC phase, with the coating having an average thickness of approximately 150 µm. Notably, the coated and coated annealed samples displayed improved microhardness of 985±13, and 1100±15 HV which was five and six times respectively that of the substrate. Electrochemical and hot corrosion tests were conducted on the substrate, coated, and coated annealed samples. The outcomes shed light on the profound impact of annealing in mitigating the corrosion rate as the porosity of the coated annealed samples was reduced to 2.53% which resulted in a significant reduction in corrosion rate when compared to coated samples. Hot corrosion tests demonstrated mass loss in the substrate due to the formation of iron oxide and subsequent spallation of it while mass gain in the coated and coated annealed samples due to oxide layer formation. Coated annealed samples exhibited lower mass gain in comparison to coated samples, showing reductions of 6% and 3% in Na2SO4/NaCl and Na2SO4/ V2O5, respectively. These findings underscore the immense promise of the annealed coating for applications demanding steadfast protection against corrosive challenges.

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Phase Evolution of Novel MoNbSiTiW Refractory High-Entropy Alloy Prepared by Mechanical Alloying

Prakash

Chandrakar

Chandraker

et al. 2022

JOM

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Effect of silicon addition on alcocrfeni high entropy alloys prepared by vacuum arc melting

Cited by 5 publications

References 18 publications

Surface morphology transformation and densification behaviour of conventionally sintered AlFeCoNiSi high entropy alloys

Surface morphology transformation and densification behaviour of conventionally sintered AlFeCoNiSi high entropy alloys

Electrochemical and hot corrosion analysis of novel AlBeSiTiV light weight HEA coating on SS316

Phase Evolution of Novel MoNbSiTiW Refractory High-Entropy Alloy Prepared by Mechanical Alloying

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