The as-cast AlxCrTaTi refractory medium entropy alloys with good room-temperature mechanical properties and high-temperature oxidation resistance

Zhang, Hongju; Du, Yuchen; Lai, Limin; Guo, Ning; Li, Ning; Guo, Shuyu

doi:10.1016/j.jallcom.2022.167675

Cited by 28 publications

(4 citation statements)

References 40 publications

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“…As mentioned above, the strength of FCC HEAs/MEAs is relatively low, which greatly limits their industrial application [16,21,24,26,28,31] Adapted with permission. [16,21,24,26,28,31] Copyright 2020, Elsevier.…”

Section: Traditional Strengthening Strategiesmentioning

confidence: 99%

“…[7] At present, it is well known that there are four core effects in HEAs/MEAs, namely, high entropy effect, sluggish diffusion effect, lattice distortion effect, and cocktail effect. [7,8,11] Thanks to these effects, HEAs/MEAs exhibit attractive properties, including but not limited to the high strength, [14][15][16] good ductility, [17][18][19] excellent wear, [20][21][22] radiation, [23][24][25] corrosion, [26,27] high-heat, [28] and oxidation [29][30][31] resistance, and hence have been regarded as promising advanced materials with vast potential applications in various industries, as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 1. Scheme indicating the concepts of compositional design, core effect-property relation, and potential engineering applications of HEAs/ MEAs [16,21,24,26,28,31]. Adapted with permission [16,21,24,26,28,31].…”

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confidence: 99%

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Strategies for Achieving Strength–Ductility Synergy in Face‐Centered Cubic High‐ and Medium‐Entropy Alloys

et al. 2023

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High‐ and medium‐entropy alloys (HEAs/MEAs), also called as multicomponent alloys, are a new class of materials that break through the traditional alloy design concept based on single principal element. However, they do not break away from the magic spell of strength–ductility trade‐off. Therefore, designing HEAs/MEAs with both high strength and high ductility still remains a great challenge nowadays. This article provides a review on the recent progress in mechanical properties of face‐centered cubic (FCC) HEAs/MEAs. First, several traditional strengthening strategies are briefly reviewed, focusing on the strengthening mechanisms and the optimized mechanical properties. Subsequently, various novel strategies for achieving strength–ductility synergy in HEAs/MEAs are summarized, which include lowering the stacking fault energy, regulating the short‐range order, promoting transformation‐induced plasticity, and constructing heterogeneous microstructures. The basic ideas and related underlying mechanisms from these strategies are discussed. Finally, the current challenges and the future outlooks are emphasized and addressed systematically. In brief, the present review is expected to provide a useful guide for the design of HEAs/MEAs with superior mechanical properties.

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Section: Traditional Strengthening Strategiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Strategies for Achieving Strength–Ductility Synergy in Face‐Centered Cubic High‐ and Medium‐Entropy Alloys

et al. 2023

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“…While the oxidation resistance of some RHEAs is similarly inferior [5][6][7][8][9][10], certain RHEAs can withstand oxygen attack up to 1500 • C thanks to complex oxides [11][12][13]. For instance, Al-Cr-Nb-Mo-Ta-Ti system RHEAs tend to the form a protective rutile-type CrTaO 4 oxide stemming from a reaction between Cr 2 O 3 and Ta 2 O 5 oxides [12,[14][15][16]. Unlike traditional Al 2 O 3 and Cr 2 O 3 oxides that appear as dense external layers, CrTaO 4 nucleates beneath a mixture (Al 2 O 3 + Cr 2 O 3 + TiO 2 ) of discontinuous scales and does not prevent internal oxidation, yet effectively blocks the outward diffusion of metal cations [15].…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behaviour of Refractory (HfCo)100−x(NbMo)x High-Entropy Alloys with a bcc+B2 Structure

Yurchenko,

Panina,

Zherebtsov

et al. 2023

Applied Sciences

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Herein, the oxidation behaviour of refractory (HfCo)100−x(NbMo)x (x = 0; 10; 25; 40; 75; 100 (at.%)) high-entropy alloys with a bcc+B2 structure subjected to cyclic oxidation at 1000 °C was studied. The single-phase B2-ordered HfCo alloy demonstrated the best spallation resistance and retained a pristine form after 100 h. The oxidation kinetics of the HfCo alloy was near-parabolic, accompanied by the formation of external HfO2 or CoO layers after 1 or 100 h, respectively. Additions of (NbMo)x deteriorated the spallation resistance (x ≤ 25 at.%) or led to complete disintegration (x > 25 at.%). Among the (NbMo)-containing alloys, the (HfCo)90(NbMo)10 alloy with the dual-phase bcc+B2 structure showed the most promising oxidation resistance. This alloy withstood cyclic oxidation up to 15 h with a mass gain close to the HfCo alloy and survived 100 h without changes in geometry of the specimen. Unlike the HfCo alloy, in the (HfCo)90(NbMo)10 alloy, the external CoO layer was found already after 1 h. The effect of chemical and phase compositions on the formation of certain oxides was discussed. Comparison with the other refractory high-entropy alloys was also presented.

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A novel Al-alloyed press-hardening steel with superior mechanical and antioxidant properties

Lin,

Zhang,

Zhang

et al. 2024

J. Iron Steel Res. Int.

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The as-cast AlxCrTaTi refractory medium entropy alloys with good room-temperature mechanical properties and high-temperature oxidation resistance

Cited by 28 publications

References 40 publications

Strategies for Achieving Strength–Ductility Synergy in Face‐Centered Cubic High‐ and Medium‐Entropy Alloys

Strategies for Achieving Strength–Ductility Synergy in Face‐Centered Cubic High‐ and Medium‐Entropy Alloys

Oxidation Behaviour of Refractory (HfCo)100−x(NbMo)x High-Entropy Alloys with a bcc+B2 Structure

A novel Al-alloyed press-hardening steel with superior mechanical and antioxidant properties

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