Effect of deep cryogenic treatment on the microstructure and mechanical properties of AlCrFe<sub>2</sub>Ni<sub>2</sub> High-entropy alloy

Li, Chengze; Qu, Yingdong; Zhang, Yufeng; Lv, Qingyao; Qi, Hao

doi:10.1088/2053-1591/ab7a5f

Cited by 6 publications

(2 citation statements)

References 35 publications

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“…Moreover, the cyclic DCT generated a more uniform residual stress distribution and further enhanced the tensile strength and ductility. [109] The benefits of DCT have previously been realized for industrially imperative Ti-6Al-4V alloy, [110,111] IN718 [112] superalloy, and even traditionally fabricated HEAs including CrFeCoNiMn 0.75 Cu 0.25 , [113] AlCrFe 2 Ni 2 , [114] and TiZrHfBeCu [115] HEAs. Thus, further exploration of DCT for 3D-printed HEAs holds abundant potential for their successful industrial applications.…”

Section: Deep Cryogenic Treatmentmentioning

confidence: 99%

Deformation Behavior of 3D‐Printed High‐Entropy Alloys: A Critical Review

Bajaj,

Feng,

et al. 2023

Adv Eng Mater

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The 3D‐printing of high‐entropy alloys (HEAs) is capable of enhancing the design and manufacturing flexibilities for the novel materials. Owing to the rapid solidification, the 3D‐printed HEAs exhibit markedly different microstructures than their conventionally‐manufactured equivalents, leading to peculiar mechanical properties. Many additively‐manufactured HEAs also break down the strength‐ductility trade‐off dilemma. Novel dynamics regarding the simultaneous and sequential nature of deformation mechanisms are emerging through recent intensive research on these materials. Herein the deformation behavior of 3D‐printed HEAs is reviewed and explained on the basis of the latest advances in this area. A comprehensive picture regarding the role of cellular dislocation networks, twinning‐induced plasticity (TWIP), and transformation‐induced plasticity (TRIP) in the monotonic and cyclic deformation of 3D‐printed HEAs is presented. Special emphasis is placed on fatigue characteristics due to the enormous interest in this burgeoning area. The effect of post‐fabrication thermomechanical processing on plasticity is discussed along with the microstructural evolution in the 3D‐printed HEAs. Several innovative developments that carry latent potential for further research are also deliberated in this review. Finally, the present understanding of the deformation behavior of 3D‐printed HEAs is summarized while gauging the future directions.This article is protected by copyright. All rights reserved.

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Section: Deep Cryogenic Treatmentmentioning

confidence: 99%

Deformation Behavior of 3D‐Printed High‐Entropy Alloys: A Critical Review

Bajaj,

Feng,

et al. 2023

Adv Eng Mater

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“…The dualphase alloys provide considerable strength while retaining about ∼20% tensile ductility (Gangireddy et al, 2019) and also show promising corrosion resistance, comparable to stainless steels (Shi et al, 2017). Since alloy design strategies attach increasing importance to cost reduction and resource-conserving aspects, the quaternary alloy system Al-Cr-Fe-Ni proved equally prolific around compositions AlCrFe 2 Ni 2 (Dong et al, 2016 andLi et al, 2020) thus avoiding expensive and resource-critical elements like Cobalt (Tkaczyk et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

The BCC-FCC Phase Transformation Pathways and Crystal Orientation Relationships in Dual Phase Materials From Al-(Co)-Cr-Fe-Ni Alloys

et al. 2020

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The alloy system Al-(Co)-Cr-Fe-Ni contains compositional ranges where a solid state BCC-FCC phase transformation leads to dual-phase materials composed of facecentered cubic (FCC) and body-centered cubic (BCC) phases with nearly equal volume fraction. The microstructure arising from this transformation at slow cooling rates is the classical Widmanstätten structure, with FCC-laths and colonies growing from grain boundaries into the parent BCC-B2 grain. Very distinct microstructures are obtained, when Widmanstätten growth is kinetically suppressed e.g., during continuous cooling with high cooling rates. These novel microstructures are associated with the spinodal decomposition of the parent BCC-B2 such that FCC growth occurs during the spinodal decomposition or upon annealing from a metastable, fully spinodal state. We review the microstructures at case as function of the imposed cooling regimes for the Co-free medium entropy alloy AlCrFe 2 Ni 2. One of them, termed ultrafine vermicular microstructure, involves a characteristic and novel crystal orientation relationship (OR) between FCC and BCC. We identify the common planes and directions of this OR using electron backscatter diffraction maps to be {111} FCC {121} BCC and 1 01 FCC 1 01 BCC , respectively. Embedded is a second OR with {131} FCC {103} BCC and 101 FCC 010 BCC. We further show that the vermicular FCC phase contains a high amount of lattice strain and sub-grain boundaries with disorientation angles in the range from 2 to 12 • , as a result of the solid-state phase transformation.

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Effect of deep cryogenic treatment on microstructure and mechanical properties of a CoCrFeNiMo medium-entropy alloy

et al. 2022

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The effects of different soaking times and cycles of deep cryogenic treatment on the microstructure and mechanical properties of Co28.5Cr21.5Fe20Ni26Mo4 medium entropy alloys were studied. The results show that the maximum hardness and compress strength were 364 HV and 3153 MPa after cryogenic deep treatment for 8 h, which were increased by about 9.97% and 33.32%, respectively. The maximum hardness and compressive strength were 375 HV and 3039 MPa, which were increased by about 13.29% and 28.50%, respectively, after three deep cryogenic cyclic times. The reason is that μ phase is rich in Mo, and Mo element has high strength and hardness. After deep cryogenic treatment, the agglomeration of μ phase in the alloys was improved, the distribution of μ phase was more uniform, the content of μ phase was increased, and the content of Mo element in the μ phase was increased, so that the strengthening effect of μ phase was enhanced.

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Effect of deep cryogenic treatment on the microstructure and mechanical properties of AlCrFe₂Ni₂ High-entropy alloy

Cited by 6 publications

References 35 publications

Deformation Behavior of 3D‐Printed High‐Entropy Alloys: A Critical Review

Deformation Behavior of 3D‐Printed High‐Entropy Alloys: A Critical Review

The BCC-FCC Phase Transformation Pathways and Crystal Orientation Relationships in Dual Phase Materials From Al-(Co)-Cr-Fe-Ni Alloys

Effect of deep cryogenic treatment on microstructure and mechanical properties of a CoCrFeNiMo medium-entropy alloy

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Effect of deep cryogenic treatment on the microstructure and mechanical properties of AlCrFe2Ni2 High-entropy alloy

Cited by 6 publications

References 35 publications

Deformation Behavior of 3D‐Printed High‐Entropy Alloys: A Critical Review

Deformation Behavior of 3D‐Printed High‐Entropy Alloys: A Critical Review

The BCC-FCC Phase Transformation Pathways and Crystal Orientation Relationships in Dual Phase Materials From Al-(Co)-Cr-Fe-Ni Alloys

Effect of deep cryogenic treatment on microstructure and mechanical properties of a CoCrFeNiMo medium-entropy alloy

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Effect of deep cryogenic treatment on the microstructure and mechanical properties of AlCrFe₂Ni₂ High-entropy alloy