Influence of processing route on the alloying behavior, microstructural evolution and thermal stability of CrMoNbTiW refractory high-entropy alloy

Raman, Lavanya; Karthick, G.; Guruvidyathri, K.; Fabijanic, Daniel; Murty, S. V. S. Narayana; Murty, B.S.; Kottada, Ravi Sankar

doi:10.1557/jmr.2020.128

Cited by 15 publications

(3 citation statements)

References 57 publications

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“…Hence, microstructural homogeneity cannot be achieved. Processing rout of casting differs from that of sintering, which influences phase formation [ 43 – 45 ]. Intermetallic phases can also be formed in a sintered sample, just as seen in casting.…”

Section: Introductionmentioning

confidence: 99%

Phase prediction, microstructure, and mechanical properties of spark plasma sintered Ni–Al–Ti–Mn–Co–Fe–Cr high entropy alloys

Olorundaisi,

Babalola,

Teffo

et al. 2023

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The effect of mechanical alloying on the development of Ni–Al–Ti–Mn–Co–Fe–Cr high entropy alloys (HEAs) utilizing the spark plasma sintering (SPS) method is the main goal of this study. A bulk sample was fabricated using SPS after the alloys were mixed for 12 h. Thermodynamic simulation, X-ray diffraction, scanning electron microscopy, nanoindentation, and microhardness were used to investigate the microstructure and mechanical properties of the as-mixed powders. The master alloy was made of NiAl and was subsequently alloyed with Ti, Mn, Co, Fe, and Cr at different compositions to develop HEAs at a sintering temperature of 850 °C, a heating rate of 100 °C/min, a pressure of 50 MPa, and a dwelling time of 5 min. A uniform dispersion of the alloying material can be seen in the microstructure of the sintered HEAs with different weight elements. The grain size analysis shows that the Ni25Al25Ti8Mn8Co15Fe14Cr5 alloy exhibited a refined structure with a grain size of 2.36 ± 0.27 µm compared to a coarser grain size of 8.26 ± 0.43 μm attained by the NiAl master alloy. Similarly, the HEAs with the highest alloying content had a greater microstrain value of 0.0449 ± 0.0036, whereas the unalloyed NiAl had 0.00187 ± 0.0005. Maximum microhardness of 139 ± 0.8 HV, nanohardness of 18.8 ± 0.36 GPa, elastic modulus of 207.5 ± 1.65 GPa, elastic recovery (We/Wt) of 0.556 ± 0.035, elastic strain to failure (H/Er) of 0.09.06 ± 0.0027, yield pressure (H3/$$E_{{\text{r}}}^{2}$$ E r 2 ) of 0.154 ± 0.0055 GPa, and the least plasticity index (Wp/Wt) of 0.444 ± 0.039 were attained by Ni25Al25Ti8Mn8Co15Fe14Cr5. A steady movement to the left may be seen in the load–displacement curve. Increased resistance to indentation by the developed HEAs was made possible by the increase in alloying metals, which ultimately led to higher nanohardness and elastic modulus.

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Section: Introductionmentioning

confidence: 99%

Phase prediction, microstructure, and mechanical properties of spark plasma sintered Ni–Al–Ti–Mn–Co–Fe–Cr high entropy alloys

Olorundaisi,

Babalola,

Teffo

et al. 2023

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“…Apart from composition, different synthesis routes were reported to yield a wide variety of microstructures [16]. To date, the most of reported RHEAs (95%) are being synthesized through the casting route [17].…”

Section: Introductionmentioning

confidence: 99%

Refractory TaTiNb, TaTiNbZr, and TaTiNbZrX (X = Mo, W) high entropy alloys by combined use of high energy ball milling and spark plasma sintering: Structural characterization, mechanical properties, electrical resistivity, and thermal conductivity

Шкодич

Kuskov

Седегов

et al. 2022

Journal of Alloys and Compounds

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“…The microstructure, properties, and performance of HEA are driven by four core effects, i.e., high configurational entropy 1,5 , lattice distortion 3 , sluggish diffusion 6 , and cocktail effect 7 . Owing to these effects, HEA exhibit excellent tensile ductility, fracture toughness, corrosion resistance, and many other important properties of relevance [8][9][10][11][12][13] . The combination of desirable property attributes in HEAs makes these materials a perfect candidate for numerous applications, like in gas storage, in ion irradiation plants, and for biomedical implants [13][14][15] .…”

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confidence: 99%

Strength–Ductility Synergy in High Entropy Alloys by Tuning the Thermo-Mechanical Process Parameters: A Comprehensive Review

2022

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IntroductionHigh Entropy Alloys (HEA) are the class of alloys having minimum of five principal elements with a concentration of constituent elements between 5 and 35 at% [1][2][3][4] . The microstructure, properties, and performance of HEA are driven by four core effects, i.e., high configurational entropy 1,5 , lattice distortion 3 , sluggish diffusion 6 , and cocktail effect 7 . Owing to these effects, HEA exhibit excellent tensile ductility, fracture toughness, corrosion resistance, and many other important properties of relevance [8][9][10][11][12][13] . The combination of desirable property attributes in HEAs makes these materials a perfect candidate for numerous applications, like in gas storage, in ion irradiation plants, and for biomedical implants [13][14][15] . The lower yield

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Influence of processing route on the alloying behavior, microstructural evolution and thermal stability of CrMoNbTiW refractory high-entropy alloy

Abstract: Abstract

Cited by 15 publications

References 57 publications

Phase prediction, microstructure, and mechanical properties of spark plasma sintered Ni–Al–Ti–Mn–Co–Fe–Cr high entropy alloys

Phase prediction, microstructure, and mechanical properties of spark plasma sintered Ni–Al–Ti–Mn–Co–Fe–Cr high entropy alloys

Refractory TaTiNb, TaTiNbZr, and TaTiNbZrX (X = Mo, W) high entropy alloys by combined use of high energy ball milling and spark plasma sintering: Structural characterization, mechanical properties, electrical resistivity, and thermal conductivity

Strength–Ductility Synergy in High Entropy Alloys by Tuning the Thermo-Mechanical Process Parameters: A Comprehensive Review

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