Investigation of nanotwins in the bimodal-structured Fe22Co22Ni20Cr22Mn14 alloy subjected to high-strain-rate deformation at cryogenic temperatures

Chung, Tsai Fu; Chen, Pin Jung; Tai, Cheng Ling; Chiu, Po Han; Lin, Yo Shiuan; Hsiao, Chien-Nan; Chen, Chih Yuan; Wang, Shing Hoa; Yeh, Jien Wei; Lee, Woei Shyan; Kuo, Chin Lung; Yang, Jer−Ren

doi:10.1016/j.matchar.2020.110667

Cited by 15 publications

(2 citation statements)

References 47 publications

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“…Similar to the NT structure, the SFE is also the decisive factor for the formation of HNT structure, and lower SFE is helpful for forming higher-order twin structure [ 107 , 118 ], i.e., HNT structures can be generated in low-SFE metals such as Mg alloy [ 125 ], Ti alloy [ 121 ], high-entropy alloy [ 126 ], twinning-induced plasticity (TWIP) steel [ 120 ], etc. Fu et al [ 125 ] obtained two-order HNT structure in Mg–8 wt.% Li alloy by one-step ultrahigh-pressure and high-temperature procedure, i.e., the sample was treated for 30 min at temperature from room temperature to 1200 °C under high pressure of 6 GPa, then quenched to room temperature, in which there was a continuous staggered twin network.…”

Section: The Nanotwinned Structurementioning

confidence: 99%

“…Inspired by the idea of forming the HNT structure through combining different types of twins, Chung et al [ 126 ] first prepared primary lamellar annealed nanotwins in an Fe 22 Co 22 Ni 20 Cr 22 Mn 14 high-entropy alloy by annealing, and then induced secondary and tertiary streak-like deformation nanotwins by subsequent high strain rate (9 × 10 −3 s −1 ) compression at cryogenic temperature (−150 °C). The obtained HNT structure significantly improved the work-hardening ability, had an excellent compression strength of ~3.3 GPa, and a high ductility of ~31.9%.…”

Section: The Nanotwinned Structurementioning

confidence: 99%

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Nanostructured Metals with an Excellent Synergy of Strength and Ductility: A Review

Chen

2022

Materials

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Nanocrystalline metals developed based on fine grain strengthening always have an excellent strength, but are accompanied by a drop in ductility. In the past 20 years, substantial efforts have been dedicated to design new microstructures and develop the corresponding processing technologies in order to solve this problem. In this article, the novel nanostructures designed for simultaneously achieving high strength and high ductility developed in recent years, including bimodal grain size distribution nanostructure, nanotwinned structure, hierarchical nanotwinned structure, gradient nanostructure, and supra-nano-dual-phase nanostructure, are reviewed. Based on a comprehensive understanding of the simultaneously strengthening and toughening mechanisms, the microstructures and corresponding processing techniques are mainly discussed, and the related prospects that may be emphasized in the future are proposed.

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Section: The Nanotwinned Structurementioning

confidence: 99%

Section: The Nanotwinned Structurementioning

confidence: 99%

Nanostructured Metals with an Excellent Synergy of Strength and Ductility: A Review

Chen

2022

Materials

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Sputter‐Deposited High Entropy Alloy Thin Film Electrocatalyst for Enhanced Oxygen Evolution Reaction Performance

Lin

et al. 2022

Small

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Thin film catalysts, giving a different morphology, provide a significant advantage over catalyst particles for the gas evolution reaction. Taking the advantages of sputter deposition, a high entropy alloy (HEA) thin film electrocatalyst is hereby reported for the oxygen evolution reaction (OER). The catalyst characteristics are investigated not only in its as‐deposited state, but also during and after the OER. For comparison, unary, binary, ternary, and quaternary thin film catalysts are prepared and characterized. The surface electronic structure modification due to the addition of a metal is studied experimentally and theoretically using density functional theory calculation. It is demonstrated that sputtered FeNiMoCrAl HEA thin film exhibits OER performance superior to all the reported HEA catalysts with robust electrocatalytic activity having a low overpotential of 220 mV at 10 mA cm–2, and excellent electrochemical stability at different constant current densities of 10 and 100 mA cm–2 for 50 h. Furthermore, the microstructure transformation is investigated during the OER, which is important for the understanding of the OER mechanism provided by HEA electrocatalyst. Such a finding will contribute to future catalyst design.

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Quantitatively Comparing 3D Discrete Element Method Simulations With Drained Compression Experiments of the Semi-solid Deformation of Al-Cu Alloys

Su,

Chen,

Yao

et al. 2023

Metall Mater Trans A

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Investigation of nanotwins in the bimodal-structured Fe22Co22Ni20Cr22Mn14 alloy subjected to high-strain-rate deformation at cryogenic temperatures

Cited by 15 publications

References 47 publications

Nanostructured Metals with an Excellent Synergy of Strength and Ductility: A Review

Nanostructured Metals with an Excellent Synergy of Strength and Ductility: A Review

Sputter‐Deposited High Entropy Alloy Thin Film Electrocatalyst for Enhanced Oxygen Evolution Reaction Performance

Quantitatively Comparing 3D Discrete Element Method Simulations With Drained Compression Experiments of the Semi-solid Deformation of Al-Cu Alloys

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