Effect of Mo and Ti on the microstructure and microhardness in AlCoFeNiMoTi high entropy alloys prepared by mechanical alloying and conventional sintering

Avila-Rubio, M.A.; Baldenebro-López, Jesús; Soto-Rojo, Rody; Ceballos-Mendivil, L.G.; Carreño-Gallardo, C.; Garza-Montes-de-Oca, Nelson F.; Baldenebro-López, F.J.

doi:10.1016/j.apt.2020.02.008

Cited by 44 publications

(3 citation statements)

References 27 publications

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“…(As already noted in Section 3.1 and shown in Figure 4 , our alloys are correctly placed in the IM and a-HEA regions of the ∆ H mix vs. δ plot [ 12 ].) This indicates that some erroneous predictions of the phase of HEAs obtained by using the Ω criterion in both a- and c-HEAs (e.g., [ 80 ]) may arise from the use of the calculated instead of the observed value of T m in the definition of this criterion [ 79 ]. This again emphasizes the importance of measurements of the thermal parameters of HEAs and other CCAs.…”

Section: Resultsmentioning

confidence: 99%

Transition from High-Entropy to Conventional Alloys: Which Are Better?

et al. 2021

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The study of the transition from high-entropy alloys (HEAs) to conventional alloys (CAs) composed of the same alloying components is apparently important, both for understanding the formation of HEAs and for proper evaluation of their potential with respect to that of the corresponding CAs. However, this transition has thus far been studied in only two types of alloy systems: crystalline alloys of iron group metals (such as the Cantor alloy and its derivatives) and both amorphous (a-) and crystalline alloys, TE-TL, of early (TE = Ti, Zr, Nb, Hf) and late (TL = Co, Ni, Cu) transition metals. Here, we briefly overview the main results for the transition from HEAs to CAs in these alloy systems and then present new results for the electronic structure (ES), studied with photoemission spectroscopy and specific heat, atomic structure, thermal, magnetic and mechanical properties of a-TE-TL and Cantor-type alloys. A change in the properties of the alloys studied on crossing from the HEA to the CA concentration range mirrors that in the ES. The compositions of the alloys having the best properties depend on the alloy system and the property selected. This emphasizes the importance of knowing the ES for the design of new compositional complex alloys with the desired properties.

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Section: Resultsmentioning

confidence: 99%

Transition from High-Entropy to Conventional Alloys: Which Are Better?

et al. 2021

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“…HEAs have gained significant attention and are finding use in various industries and applications such as aircraft components, engine components, renewable energy, implantable medical devices, electronics, transportation (high-speed trains), additive manufacturing, etc. Several preparation methods were utilized to study the impact of the conditions parameters on the microstructure, magnetic, and mechanical properties of multicomponent HEAs alloys such as arc melting [6,7], induction melting [8], mechanical alloying (MA) [9,10], and laser additive manufacturing [11]. In arc melting, high-frequency electric arcs are used to melt and mix the constituent elements rapidly.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aluminum Addition on the Microstructure, Magnetic, and Mechanical Properties of FeCrCoNiMn High-Entropy Alloy

Alleg,

Bekhouche,

Hachache

et al. 2023

Crystals

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High-entropy FeCoCrNiMn (C1) and FeCoCrNiMn10Al10 (C2) alloys (HEAs) were mechanically alloyed for 24 h and heated to 900 °C (C1_900 °C and C2_900 °C). The powders were also compacted into pellets (C1_pellet and C2_pellet) and sintered at 500 °C for 1 h. Crystal structure, microstructure, magnetic, and mechanical properties were investigated by X-ray diffraction, scanning electron microscopy, vibrating sample magnetometry, and microindentation. During the milling process, a mixture of body-centered-cubic (BCC) and face-centered-cubic (FCC) phases with a crystallite size in the range of 9–13 nm was formed in the C1 HEA alloy. The dual FCC + BCC solid solutions remain for the C1_pellet and transform to a single FCC for the C1_900 °C powders. Al addition stabilizes the BCC structure in the FeCoCrNiMn10Al10 HEA alloy, as revealed by the structural refinement. The structure exhibits a mixture of BCC + FCC solid solutions for the C2 powders and BCC + FCC + CrCo sigma phase for the C2_pellet and C2_900 °C powders. The crystallite sizes are in the range of 6-93 nm for all the samples. The saturation magnetization (Ms), coercivity (Hc), and squareness ratio (Mr/Ms) are estimated to be 24.2 emu/g, 153.62 Oe, and 0.165, respectively, for C1 and 28.45 emu/g, 188.48 Oe, and 0.172 for C2. The C1_900 °C and C2_900 °C powders exhibit, respectively, paramagnetic and soft magnetic behaviors and an exchange bias at room temperature. The C1_pellet and C2_pellet HEAs show high hardness values of 584.85 Hv and 522.52 Hv, respectively.

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“…Türkiye'de güneş enerjisinden faydalanma genellikle sıcak su hazırlama şeklindedir. High entropy alloys (HEAs), also termed multi-component alloys, represent a new group of alloy systems comprising multiple metallic elements with different crystal structures at either equiatomic ratio or near equiatomic ratios that can crystallize as simple solid solution phases, including body-centered cubic (BCC) or face-centered cubic (FCC) crystal structures, or both [1,2]. In the recent past, high entropy alloys have received noteworthy attention from both engineers and scientists in the field of materials science thanks to their many outstanding properties including excellent resistance to oxidation and corrosion [3], high strength, and high fracture toughness [4] and good thermal stability [5].…”

Section: Introductionmentioning

confidence: 99%