Metalloid substitution elevates simultaneously the strength and ductility of face-centered-cubic high-entropy alloys

Wei, Daixiu; Wang, Liqiang; Zhang, Yongjie; Gong, Wu; Tsuru, Tomohito; Lobzenko, Ivan; Jiang, Jing; Harjo, Stefanus; Kawasaki, Takuro; Bae, Jae Wung; Lu, Wenjun; Zhou, Lu; Hayasaka, Yuichiro; Kiguchi, Takanori; Okamoto, Norihiko L.; Ichitsubo, Tetsu; Kim, Hyoung Seop; Furuhara, Tadashi; Ma, Evan; Kato, Hidemi

doi:10.1016/j.actamat.2021.117571

Cited by 81 publications

(13 citation statements)

References 88 publications

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“…The phases included in the high VEC Bio-HEAs vary depending on the elemental composition and ratio and the effects of the process. Since the elements used are BCC, the generated solid solution phases are still based on the BCC phase, and the synergistic precipitation phases contain other solid solution phases such as Laves phase, BCC2 phase, B2, and FCC phase ( Wei et al, 2022b ).…”

Section: Component Design Theory and Simulation Studiesmentioning

confidence: 99%

Bio-high entropy alloys: Progress, challenges, and opportunities

Feng

Tang

Liu

et al. 2022

Front. Bioeng. Biotechnol.

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With the continuous progress and development in biomedicine, metallic biomedical materials have attracted significant attention from researchers. Due to the low compatibility of traditional metal implant materials with the human body, it is urgent to develop new biomaterials with excellent mechanical properties and appropriate biocompatibility to solve the adverse reactions caused by long-term implantation. High entropy alloys (HEAs) are nearly equimolar alloys of five or more elements, with huge compositional design space and excellent mechanical properties. In contrast, biological high-entropy alloys (Bio-HEAs) are expected to be a new bio-alloy for biomedicine due to their excellent biocompatibility and tunable mechanical properties. This review summarizes the composition system of Bio-HEAs in recent years, introduces their biocompatibility and mechanical properties of human bone adaptation, and finally puts forward the following suggestions for the development direction of Bio-HEAs: to improve the theory and simulation studies of Bio-HEAs composition design, to quantify the influence of composition, process, post-treatment on the performance of Bio-HEAs, to focus on the loss of Bio-HEAs under actual service conditions, and it is hoped that the clinical application of the new medical alloy Bio-HEAs can be realized as soon as possible.

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Section: Component Design Theory and Simulation Studiesmentioning

confidence: 99%

Bio-high entropy alloys: Progress, challenges, and opportunities

Feng

Tang

Liu

et al. 2022

Front. Bioeng. Biotechnol.

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“…Furthermore, many HEAs with excellent mechanical properties have been developed in recent years, which yield strength exceeding 1000 MPa and the elastic modulus lower than 70 GPa These HEAs often have high tensile strength and excellent elongation data, achieving simultaneous improvement of material strength and plasticity. Wei ( Wei et al, 2022b ) replaced part of the metal elements in HEAs with the metalloid element Si, in which the metalloid element is between metals and nonmetals, and it is easy to induce complex subnanometre-scale structures in the substrate. Figure 2A illustrates the accumulation of dislocations on the {111}-type FCC slip planes.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“… (A) Two-beam BF images show the frequently observed accumulation of dislocations on the {111}-type FCC slip planes in Co 22 Cr 22 Fe 22 Ni 22 Si 10 and Co 10 Cr 10 Fe 10 Ni 10 Mn 10 Si 10 HEA ( Wei et al, 2022b ). (B) the (100) peak of hcpM could be found when the stress was over 520 MPa (C) Dislocations in the 8% strained O-2 HEA, imaged under {1a11}-type diffraction conditions ( Wang et al, 2020b ).…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Medical high-entropy alloy: Outstanding mechanical properties and superb biological compatibility

Liu

Yang²,

Liu³

et al. 2022

Front. Bioeng. Biotechnol.

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Medical metal implants are required to have excellent mechanical properties and high biocompatibility to handle the complex human environment, which is a challenge that has always existed for traditional medical metal materials. Compared to traditional medical alloys, high entropy alloys (HEAs) have a higher design freedom to allow them to carry more medical abilities to suit the human service environment, such as low elastic modulus, high biocompatible elements, potential shape memory capability. In recent years, many studies have pointed out that bio-HEAs, as an emerging medical alloy, has reached or even surpassed traditional medical alloys in various medical properties. In this review, we summarized the recent reports on novel bio-HEAs for medical implants and divide them into two groups according the properties, namely mechanical properties and biocompatibility. These new bio-HEAs are considered hallmarks of a historic shift representative of a new medical revolution.

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“…SFE affects the plasticity mechanism, and the mechanical performance of FCC-phase alloys [9], where a high SFE (>45 mJ/m 2 ) corresponds to a perfect dislocation slip, an intermediate SFE (15-45 mJ/m 2 ) promotes the activation of mechanical twinning, and a low SFE (<15 mJ/m 2 ) results in a strain-induced martensitic transformation from the FCC phase to the hexagonal close-packed (HCP) phase [9][10][11][12]. Both mechanical twinning and martensitic transformation can improve the tensile strength, ductility, and fatigue properties [9][10][11][12][13][14][15][16][17] and are known as twinning-induced plasticity (TWIP) and transformationinduced plasticity (TRIP) mechanisms [9,13]. Thus, further improving the equiatomic CoCrFeMnNi HEAs by reducing the SFE is reasonable.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, further improving the equiatomic CoCrFeMnNi HEAs by reducing the SFE is reasonable. Following this guideline, a variety of TWIP and TRIP HEAs with intermediate and low SFEs were designed by modifying the composition from equiatomic to near-equiatomic, which widened the window of the HEAs [10][11][12][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Tuning Microstructure and Mechanical Performance of a Co-Rich Transformation-Induced Plasticity High Entropy Alloy

Xie

Zhang

et al. 2022

Materials

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Multi-principal element alloys and high-entropy alloys (HEAs) are emerging metallic materials with unprecedented structures and properties for various applications. In this study, we tuned the microstructure and mechanical performance of a recently designed high-performance Co-rich TRIP-HEA via thermomechanical processing (TMP). The microstructures of the HEA after various TMP routines were characterized, and their correlation with room-temperature tensile performance was clarified. The results showed that grain refinement is an effective strategy for enhancing strength while retaining satisfactory ductility. The formation of incoherent precipitates slightly improves the strength but inevitably sacrifices the ductility, which needs to be considered for optimizing the TMPs. The room temperature tensile yield strength and ultimate tensile strength were increased from 254.6 to 641.3 MPa and from 702.5 to 968.4 MPa, respectively, but the tensile elongation retains a satisfactory value of 68.8%. We herein provide important insights into the regulation of the microstructure and mechanical properties of TRIP-HEAs.

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Metalloid substitution elevates simultaneously the strength and ductility of face-centered-cubic high-entropy alloys

Cited by 81 publications

References 88 publications

Bio-high entropy alloys: Progress, challenges, and opportunities

Bio-high entropy alloys: Progress, challenges, and opportunities

Medical high-entropy alloy: Outstanding mechanical properties and superb biological compatibility

Tuning Microstructure and Mechanical Performance of a Co-Rich Transformation-Induced Plasticity High Entropy Alloy

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