Characterization and formation mechanism of non-metallic inclusions in single bcc-phase high entropy alloy

Wang, Yong; Lin, Sen; Dong, Zhihua; Park, Joo Hyun; Wang, Qiang; Ni, Hongwei; Mu, Wangzhong

doi:10.1016/j.matchar.2023.113299

Materials Characterization

2023

DOI: 10.1016/j.matchar.2023.113299

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Characterization and formation mechanism of non-metallic inclusions in single bcc-phase high entropy alloy

Yong Wang,

Sen Lin,

Zhihua Dong

et al.

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2024

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Cited by 6 publications

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Strengthening and Toughening of the Co₃₄Cr₃₂Ni₂₇Al_3.5Ti_3.5 Alloy Through Coherent L1₂ Nanoprecipitates

Li,

Song,

Gao

et al. 2024

Adv Eng Mater

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In this work, the L12‐strengthened Co34Cr32Ni27Al3.5Ti3.5 medium‐entropy alloy (MEA) with outstanding strength and ductility was developed through cold rolling and annealing (CRA). The CRA promotes the formation of coherent L12 nanoprecipitates in the matrix and precipitates inside the grains (Ti‐rich phases), resulting in dislocation sliding and multiplication during deformation. The as‐cast sample exhibits low yield strength (YS) of ∽498.5 MPa, ultimate tensile strength (UTS) of ∽820.5 MPa, and uniform elongation (UE) of ∽29.8%. After cold rolling and annealing, the YS, UTS, and UE are significantly increased to ∽678.4 MPa, ∽1109.3 MPa, and ∽44.5%, respectively. The excellent mechanical performance results from dislocation strengthening and precipitation strengthening of the L12 phase. The trade‐off of strength‐ductility is resolved by achieving an appropriate balance between the hard phase rich in L12/Ti and the soft FCC phase. Our finding demonstrates that the CRA method can be used to create coherent L12 nanoprecipitates that are beneficial for strong and ductile MEA. This work provides a broader perspective for CoCrNi‐based MEAs with high performance in the future.This article is protected by copyright. All rights reserved.

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Strengthening and Toughening of the Co₃₄Cr₃₂Ni₂₇Al_3.5Ti_3.5 Alloy Through Coherent L1₂ Nanoprecipitates

Li,

Song,

Gao

et al. 2024

Adv Eng Mater

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High-temperature wear mechanisms and oxidation properties of MoNbTaWTi refractory high entropy alloy prepared by direct laser deposition

Li,

Wang,

Wang

et al. 2024

International Journal of Refractory Metals and Hard Materials

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Influence of substitution of Cr by Cu on phase equilibria and microstructures in the Fe–Ni–Co–Cr high-entropy alloys

Záděra,

Sopoušek,

Buršík

et al. 2024

Intermetallics

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Characterization and formation mechanism of non-metallic inclusions in single bcc-phase high entropy alloy

Cited by 6 publications

References 50 publications

Strengthening and Toughening of the Co₃₄Cr₃₂Ni₂₇Al_3.5Ti_3.5 Alloy Through Coherent L1₂ Nanoprecipitates

Strengthening and Toughening of the Co₃₄Cr₃₂Ni₂₇Al_3.5Ti_3.5 Alloy Through Coherent L1₂ Nanoprecipitates

High-temperature wear mechanisms and oxidation properties of MoNbTaWTi refractory high entropy alloy prepared by direct laser deposition

Influence of substitution of Cr by Cu on phase equilibria and microstructures in the Fe–Ni–Co–Cr high-entropy alloys

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Characterization and formation mechanism of non-metallic inclusions in single bcc-phase high entropy alloy

Cited by 6 publications

References 50 publications

Strengthening and Toughening of the Co34Cr32Ni27Al3.5Ti3.5 Alloy Through Coherent L12 Nanoprecipitates

Strengthening and Toughening of the Co34Cr32Ni27Al3.5Ti3.5 Alloy Through Coherent L12 Nanoprecipitates

High-temperature wear mechanisms and oxidation properties of MoNbTaWTi refractory high entropy alloy prepared by direct laser deposition

Influence of substitution of Cr by Cu on phase equilibria and microstructures in the Fe–Ni–Co–Cr high-entropy alloys

Contact Info

Product

Resources

About

Strengthening and Toughening of the Co₃₄Cr₃₂Ni₂₇Al_3.5Ti_3.5 Alloy Through Coherent L1₂ Nanoprecipitates

Strengthening and Toughening of the Co₃₄Cr₃₂Ni₂₇Al_3.5Ti_3.5 Alloy Through Coherent L1₂ Nanoprecipitates