Ultrahigh-strength and ductile CoCrFeNi-based high-entropy alloys manufactured by laser powder bed fusion with multiple strengthening mechanisms

Wu, Zhining; He, Mengjie; Cao, Hailin; Wang, Shanshan; Chen, Ruiguang; Cao, Boxuan; Shi, Rongpei; Liu, Xingjun; Yu, Suzhu; Wang, Shuai; Bai, Jiaming; Wei, Jun

doi:10.1016/j.jmrt.2023.06.110

Cited by 15 publications

(2 citation statements)

References 57 publications

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“…The reason for generating this structure is diverse. The core-shell structure was found in the LPBFed B4C-added CoCrFeNi sample [144]. The structure was generated due to the B4C not being fully melted, causing the carbide transformation in the precipitate.…”

Section: Additive Of Micro/nanoparticlesmentioning

confidence: 97%

“…In addition to introducing alloy elements and interstitial elements to strengthen the matrix, micro or nanoparticles are added to modify the microstructure and properties of the HEAs. Most of the selected particles are ceramic, such as carbide [102,103,[143][144][145], nitride [67,68,146], and oxide [147,148]. Shen et al [143] have investigated the effect of the addition of SiC to the DEDed CoCrFeNi matrix.…”

Section: Additive Of Micro/nanoparticlesmentioning

confidence: 99%

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Review on the Tensile Properties and Strengthening Mechanisms of Additive Manufactured CoCrFeNi-Based High-Entropy Alloys

Wu,

Wang,

Jia

et al. 2024

Metals

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The advent of high-entropy alloys (HEAs) provides new possibilities for the metallurgical community. CoCrFeNi-based alloys have been widely recognized to demonstrate superior mechanical properties, amongst the high-entropy alloy systems; in particular, they possess an outstanding tensile ductility and work-hardening capacity. Additive manufacturing (AM) uses a layer-by-layer material deposition approach to build parts directly from computer-aided design models, which are capable of producing near-net-shape HEAs with superior mechanical properties, surpassing traditional manufacturing methods that require a time-consuming post-treatment process, such as cutting, milling, and molding. Moreover, the rapid solidification inherent in AM processes induces the formation of high-density dislocations, which are capable of enhancing the mechanical properties of HEAs. This review comprehensively investigates and summarizes the diverse strengthening mechanisms within CoCrFeNi-based alloys produced using AM technologies, with a specific focus on their influence on tensile properties. A correlation is established between the AM processing parameters and the resultant phases and microstructures, as well as the mechanical properties of CoCrFeNi-based HEAs, which provide guidelines to achieve a superior strength–ductility synergy.

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Section: Additive Of Micro/nanoparticlesmentioning

confidence: 97%

Section: Additive Of Micro/nanoparticlesmentioning

confidence: 99%

Review on the Tensile Properties and Strengthening Mechanisms of Additive Manufactured CoCrFeNi-Based High-Entropy Alloys

Wu,

Wang,

Jia

et al. 2024

Metals

Self Cite

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Microstructure, Texture, and Mechanical Properties of 0.4GNPs–Mg–8Al–1Sm Composites Prepared by Pulse Current‐Assisted Multidirectional Forging

Chen,

Yu,

Zhou

2024

Adv Eng Mater

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The present study investigates the evolution of the microstructure and texture of a hot‐pressed sintered 0.4GNPs–Mg–8Al–1Sm (mass fraction, %) composite material during a pulsed current‐assisted multidirectional forging process. Additionally, this study explores the use of the pulse current‐assisted multidirectional forging mechanism for strengthening the mechanical properties of composite materials. The results indicate that as the cumulative strain (ΣΔε) increases, the amount of Mg17Al12 and Al2Sm gradually increases while their size decreases. Furthermore, the fraction of the recrystallization area increases. The recrystallization mechanism is dominated by continuous dynamic recrystallization and discontinuous dynamic recrystallization. The refinement of the alloy grain size is attributed to dynamic recrystallization. Specifically, at ΣΔε = 3.15, the compressive strength and fracture strain of the multidirectional forged 0.4GNPs–Mg–8Al–1Sm composite reach 461.5 MPa and 18.8%, respectively. By quantitatively analyzing the strengthening mechanism of the alloy, it is determined that fine‐grain strengthening is the most significant mechanism contributing to the strength of the 0.4GNPs–Mg–8Al–1Sm composite.

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The Corrosion Behavior and Mechanism of CoCrFeNi High-Entropy Alloy Subjected to AC Interference in a Simulated Littoral Environment

Xu,

Zhu,

Yuan

et al. 2024

J. of Materi Eng and Perform

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Ultrahigh-strength and ductile CoCrFeNi-based high-entropy alloys manufactured by laser powder bed fusion with multiple strengthening mechanisms

Cited by 15 publications

References 57 publications

Review on the Tensile Properties and Strengthening Mechanisms of Additive Manufactured CoCrFeNi-Based High-Entropy Alloys

Review on the Tensile Properties and Strengthening Mechanisms of Additive Manufactured CoCrFeNi-Based High-Entropy Alloys

Microstructure, Texture, and Mechanical Properties of 0.4GNPs–Mg–8Al–1Sm Composites Prepared by Pulse Current‐Assisted Multidirectional Forging

The Corrosion Behavior and Mechanism of CoCrFeNi High-Entropy Alloy Subjected to AC Interference in a Simulated Littoral Environment

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