Microstructure and mechanical properties of equiatomic Ti-containing medium-entropy alloys

Son, Sujung; Lee, Dowon; Kwon, Hyuk-Sung; Moon, Jongun; Park, Ki Beom; Kim, Aeree; Choi, Jungwoo; Jeong, Jin-Hwan; Cho, Sung-Ho; Kim, Hyoung Seop

doi:10.1016/j.jallcom.2022.168089

Cited by 13 publications

(6 citation statements)

References 58 publications

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“…Recently, Son et al [74] utilized Thermo-Calc simulation software and thermodynamic calculation to develop three MEAs with a single-phase BCC structure: Ti-V-Mo, Ti-Zr-Mo, and Ti-V-Zr-Mo. However, the Ti-Zr-Mo exhibited two different lattice constants of the BCC phase due to severe compositional segregation.…”

Section: Biomedical Meas (Bio-meas)mentioning

confidence: 99%

“…presents the thermodynamic parameters, mechanical properties, and phase stability parameters for published Bio-HEAs/MEAs[32,44,51,64,70,[72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87].…”

mentioning

confidence: 99%

“…parameters, mechanical properties, and phase stability parameters of published biomedical high-entropy alloys/medium-entropy alloys[32,44,51,64,70,[72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87].AlloyPhase δ ΔSmix/R (J/K•mo l)ΔHmix(kJ/…”

mentioning

confidence: 99%

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A Review: Design from Beta Titanium Alloys to Medium-Entropy Alloys for Biomedical Applications

Wong,

Hsu,

et al. 2023

Materials

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β-Ti alloys have long been investigated and applied in the biomedical field due to their exceptional mechanical properties, ductility, and corrosion resistance. Metastable β-Ti alloys have garnered interest in the realm of biomaterials owing to their notably low elastic modulus. Nevertheless, the inherent correlation between a low elastic modulus and relatively reduced strength persists, even in the case of metastable β-Ti alloys. Enhancing the strength of alloys contributes to improving their fatigue resistance, thereby preventing an implant material from failure in clinical usage. Recently, a series of biomedical high-entropy and medium-entropy alloys, composed of biocompatible elements such as Ti, Zr, Nb, Ta, and Mo, have been developed. Leveraging the contributions of the four core effects of high-entropy alloys, both biomedical high-entropy and medium-entropy alloys exhibit excellent mechanical strength, corrosion resistance, and biocompatibility, albeit accompanied by an elevated elastic modulus. To satisfy the demands of biomedical implants, researchers have sought to synthesize the strengths of high-entropy alloys and metastable β-Ti alloys, culminating in the development of metastable high-entropy/medium-entropy alloys that manifest both high strength and a low elastic modulus. Consequently, the design principles for new-generation biomedical medium-entropy alloys and conventional metastable β-Ti alloys can be converged. This review focuses on the design from β-Ti alloys to the novel metastable medium-entropy alloys for biomedical applications.

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Section: Biomedical Meas (Bio-meas)mentioning

confidence: 99%

mentioning

confidence: 99%

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A Review: Design from Beta Titanium Alloys to Medium-Entropy Alloys for Biomedical Applications

Wong,

Hsu,

et al. 2023

Materials

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“…Other Ti-based MEAs such as TiVMo, TiZrMo, TiZrNbTa TiZrNbMo and TiVZrMo were also recently investigated [72][73][74]. Compared to the traditional and highly researched Ti-6Al-4V alloy, the newly developed Ti40Zr20Hf10Nb20Ta10 shows similar strength and ductility.…”

Section: Meas As Biomaterialsmentioning

confidence: 99%

A Fresh Perspective on Medium Entropy Alloys Applications as Coating and Coating Substrate

Nartita¹,

Ioniță²,

Demetrescu³

et al. 2022

AnnalsARSciPhysChem

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In order to evolve as a society we need increasingly efficient technologies and implicitly materials with great performance that promote safety and sustainability. The discovery of high entropy alloys was received with much enthusiasm due to the possibility of designing new materials with improved properties, that could be used in applications that require extreme conditions or a very specific combination of properties. As the research in this area is continuously increasing and the results are very promising, this review focuses on the most recent investigations on medium entropy alloys (MEAs) applications, highlighting their properties, but taking into consideration other factors, such as economic and environmental factors. Additionally, considering the high cost associated with MEAs fabrication, MEA coatings are also explored, as they are nowadays regarded as a more convenient procedure to obtain the required properties for various substrate materials.

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“…In recent years, based on the concept of HEAs, alloy systems containing fewer elements (3-4 components) with relatively lower configuration entropy (1R ≤ ∆S < 1.5R) have been studied [16]. They are defined as medium-entropy alloys (MEAs), which also possess remarkable comprehensive properties [17,18]. Their fewer principal components reduce the design complexity and fabrication difficulty of MEAs.…”

Section: Introductionmentioning

confidence: 99%

Stepwise Laser Cladding of TiNbZr and TiTaZr Medium-Entropy Alloys on Pure Ti Substrate

Gao

Liu

et al. 2023

Metals

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This work aimed to fabricate two varieties of near-equiatomic TiNbZr and TiTaZr medium-entropy alloy (MEA) claddings on pure Ti as protective layers by stepwise laser cladding. Their stratified component distribution, microstructural characteristics, and phase constitutions were analyzed, with their hardness and wear resistance were compared with that of pristine Ti. It was found that a single body-centered-cubic solid-solution phase in both MEA claddings were realized on the hexagonal closed-packed pure Ti substrates. The subgrain structures in the TiNbZr cladding were cellular grains, while the ones in the TiTaZr cladding were much denser dendrite arms, which led to increased residual stress. The results showed that the hardness of the TiNbZr and TiTaZr claddings were 450 ± 30 HV0.2 and 513 ± 27 HV0.2, respectively, 2.6 times and 3 times that of the pure Ti (170 ± 11 HV0.2). Also, the consequent wear rates decreased from 2.08 × 10−4 mm3·N−1·m−1 (pure Ti) to 0.49 × 10−4 mm3·N−1·m−1 (TiNbZr) and 0.32 × 10−4 mm3·N−1·m−1 (TiTaZr). Such high hardness and enhanced wear resistance are attributed to the solid-solution strengthening of the body-centered-cubic phase and the residual stress in the claddings. The realization of hard MEA layers by stepwise laser cladding offers a flexible and effective way for protecting pure Ti.

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Microstructure and mechanical properties of equiatomic Ti-containing medium-entropy alloys

Cited by 13 publications

References 58 publications

A Review: Design from Beta Titanium Alloys to Medium-Entropy Alloys for Biomedical Applications

A Review: Design from Beta Titanium Alloys to Medium-Entropy Alloys for Biomedical Applications

A Fresh Perspective on Medium Entropy Alloys Applications as Coating and Coating Substrate

Stepwise Laser Cladding of TiNbZr and TiTaZr Medium-Entropy Alloys on Pure Ti Substrate

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