Magnetic properties and possible martensitic transformation in equiatomic quaternary Heusler alloy CoMnNiSn

Lu, Tongyou; Shi, Xiangyu; Li, Jianqiang; Bai, Songwei; Liu, Heyan; Luo, Hongzhi

doi:10.1016/j.jmmm.2022.169844

Cited by 4 publications

(2 citation statements)

References 41 publications

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“…2C-F known as the HEUSLER. The HEUSLER phase is a magnetic intermetallics with FCC crystal structure [63][64][65]. It is paramount to note that the even dispersion of the alloying materials has the tendency of enhancing the microstructural and mechanical behavior of the developed HEA, by attaining a strong bonding between the constituent elements without noticeable deficiencies such as cracks and pores [62] (Fig.…”

Section: Resultsmentioning

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: Resultsmentioning

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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“…Hence, a new phase (AlCrNiTi)0.5 (AlNiTi)0.5 (CoFeNi)1 was introduced in Figure 1C. The phase is a magnetic intermetallic with FCC crystal structure [29][30][31]. It is paramount to note that the even dispersion of the alloying materials tends to enhance the microstructural and mechanical behavior of the NiAl-based HEA by attaining a strong bonding between the constituent elements without noticeable deficiencies like cracks and pores [28].…”

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Mechanical and Microstructural Behavior of Sintered NiAl-Based High Entropy Alloy

Olorundaisi,

Babalola,

Teffo

et al. 2024

MSF

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A high entropy Ni-Al-Ti-Mn-Co-Fe-Cr alloy (HEA) system was fabricated using spark plasma sintering (SPS). The alloys at different elemental compositions were developed at a sintering temperature of 850 °C, a heating rate of 90 °C/min, a pressure of 50 MPa, and a dwelling time of 5 min. The sintered alloys' mechanical characteristics, microstructure, phase evolution, and density were assessed. The evolved microstructure of the sintered HEAs shows a homogenous dispersion of the alloying metals. The sintered microstructures showed a mixture of simple and complex phases. The phase refinement shows that the sintered HEAs exhibited a lower and the least grain size of 2.28 µm compared to the Ni50Al50 alloy having 8.26 µm. Likewise, a higher micro-strain value of 1.25E-1 was attained by the non-equal atomic HEA, while the unalloyed has 1.87E-3. The microhardness value of the sintered alloys varied from 103.5 HV to 139.2 HV, while their measured density varied from 5.23 g/cm3 to 6.44 g/cm3.

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Density functional study on electronic structure, magnetic and thermodynamic properties of YX′CrZ (X′ = Fe, Co; Z = As, Sb) quaternary Heusler alloys

Dharmaraj,

Amudhavalli,

Manikandan

et al. 2023

Indian J Phys

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Magnetic properties and possible martensitic transformation in equiatomic quaternary Heusler alloy CoMnNiSn

Cited by 4 publications

References 41 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

Mechanical and Microstructural Behavior of Sintered NiAl-Based High Entropy Alloy

Density functional study on electronic structure, magnetic and thermodynamic properties of YX′CrZ (X′ = Fe, Co; Z = As, Sb) quaternary Heusler alloys

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