The effect of Cr and Nb addition on the structural, morphological, and magnetic properties of the mechanically alloyed high entropy FeCoNi alloys

Şimşek, Telem; Avar, Barış; Chattopadhyay, Arun K.; Özcan, Şadan; Şimşek, Tuncay

doi:10.1007/s00339-022-05836-y

Cited by 13 publications

(3 citation statements)

References 51 publications

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“…The highest hardness values of Al x CoCrFeNi (x = 0.3-1.0), Al x CoCrFeMnNi (x = 0-2.0), Materials 2024, 17, 812 2 of 12 FeCoCrNiMnAl x (x = 0-1.0) and CoCrFeNiNb x (x = 0.5-0.8) are more than 600 HV. Among these, the friction coefficients of FeCoCrNiMnAl x (x = 0-1.0) are below 0.3 [22][23][24][25]. Al 2 CrFeCoCuTiNi x (x = 0-2.0), FeCoNiCrSiAl x (x = 0-1.5) and FeCoCrNiAlTi x (x = 0-1.0) have the highest hardness values, which are more than 900 HV [26][27][28].…”

Section: Introductionmentioning

confidence: 97%

Microstructure and Friction Properties of AlCrTiVNbx High-Entropy Alloys via Annealing Manufactured by Vacuum Arc Melting

Li,

Zhang,

Luo

et al. 2024

Materials

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To enhance the friction and wear properties of alloys, AlCrTiVNbx high-entropy alloys (HEAs) with various Nb contents were prepared using the arc melting technique and then annealed at 1000 °C for 2 h. The microstructure and hardness changes in the AlCrTiVNbx (x = 0.3, 0.4, and 0.5) HEAs after casting and annealing were studied via scanning electron microscopy, X-ray diffractometry, optical microscopy and the Vickers hardness test. The MFT-EC400 ball disc reciprocating friction and wear tester was used to investigate the wear resistance of the HEAs before and after annealing. The results show that the annealed AlCrTiVNbx HEAs changed from a single-phase structure to a multi-phase structure, and the content of the face-center cubic (FCC) phase and hexagonal close-packed (HCP) phase further increases with the increase in Nb content. The hardness value of the annealed HEAs is greatly enhanced compared with the casting state, and the hardness of the Nb0.5 HEA is increased from 543 HV to 725 HV after annealing. The wear resistance of the alloys after the annealing treatment is also greatly improved, among which Nb0.5 has the best wear resistance. The average friction coefficient of Nb0.5 is 0.154 and the wear rate is 2.117 × 10−5 mm3/(N·m). We believe that the precipitation strengthening after the annealing treatment and the lubrication effect of the FCC phase are the reasons for the significant improvement in wear resistance. The morphology of the samples indicates that the wear mechanism of the alloy includes adhesive wear, abrasive wear and a certain degree of oxidation wear.

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Section: Introductionmentioning

confidence: 97%

Microstructure and Friction Properties of AlCrTiVNbx High-Entropy Alloys via Annealing Manufactured by Vacuum Arc Melting

Li,

Zhang,

Luo

et al. 2024

Materials

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“…An essential HEA introduced by Cantor [2] is FeNiCoCrMn, a combination of four elements from the first group and one from the second group. The FeCoNi system has attracted the attention of the research community as the base alloy for a number of multi-component HEAs [15][16][17]. The FCC single structure is formed by these alloying elements, which reside on the periodic table next to each other [18].…”

Section: Introductionmentioning

confidence: 99%

Alloying, phases and magnetic behaviour of mechanically alloyed FeNiMnCu-based high entropy alloys

Jahani

Reihanian

Gheisari

2023

Materials Science and Technology

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In the present work, FeNiMnCuX (X: Co, Cr, Mo, Ti, W) high entropy alloys are successfully fabricated by mechanical alloying. After 15 h of milling, FeNiMnCu and FeNiMnCuCo alloys form a single FCC structure, while other alloys formed an FCC + BCC mixture structure. All alloys contained homogeneous distributions of Fe and Ni, while Cu was segregated. Alloys FeNiMnCuTi and FeNiMnCuW exhibited homogeneous distributions of Mn, whereas others exhibited Mn-rich islands. Except for the FeNiMnCuTi alloy, all alloys exhibited a soft magnetic behaviour. The saturation magnetisation of the base FeNiMnCu alloy was increased by adding Co and decreased by adding Cr, Mo, Ti, and W.

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“…One of the pathways to modifying the soft response is the Technologies 2023, 11, 78 2 of 13 controlled addition of a small percentage of other elements. It has been found that the addition of non-magnetic elements, such as Cr and Nb, reduces both the magnetisation of saturation and the coercivity [12].…”

Section: Introductionmentioning

confidence: 99%

Two Fe-Zr-B-Cu Nanocrystalline Magnetic Alloys Produced by Mechanical Alloying Technique

et al. 2023

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Fe-rich soft magnetic alloys are candidates for applications as magnetic sensors and actuators. Spring magnets can be obtained when these alloys are added to hard magnetic compounds. In this work, two nanocrystalline Fe-Zr-B-Cu alloys are produced by mechanical alloying, MA. The increase in boron content favours the reduction of the crystalline size. Thermal analysis (by differential scanning calorimetry) shows that, in the temperature range compressed between 450 and 650 K, wide exothermic processes take place, which are associated with the relaxation of the tensions of the alloys produced by MA. At high temperatures, a main crystallisation peak is found. A Kissinger and an isoconversional method were used to determine the apparent activation of the exothermic processes. The values are compared with those found in the scientific literature. Likewise, adapted thermogravimetry allowed for the determination of the Curie temperature. The functional response has been analysed by hysteresis loop cycles. According to the composition, the decrease of the Fe/B ratio diminishes the soft magnetic behaviour.

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The effect of Cr and Nb addition on the structural, morphological, and magnetic properties of the mechanically alloyed high entropy FeCoNi alloys

Cited by 13 publications

References 51 publications

Microstructure and Friction Properties of AlCrTiVNbx High-Entropy Alloys via Annealing Manufactured by Vacuum Arc Melting

Microstructure and Friction Properties of AlCrTiVNbx High-Entropy Alloys via Annealing Manufactured by Vacuum Arc Melting

Alloying, phases and magnetic behaviour of mechanically alloyed FeNiMnCu-based high entropy alloys

Two Fe-Zr-B-Cu Nanocrystalline Magnetic Alloys Produced by Mechanical Alloying Technique

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