| Dynamically reversible shear transformations in a CrMnFeCoNi high-entropy alloy at cryogenic temperature | |
Ming, Kaisheng1; Li, Bo1 ; Bai, Lichen1; Jiang P(姜萍)2; Wu XL(武晓雷)2; Zheng, Shijian1; Wang, Jian3
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| Corresponding Author | Zheng, Shijian([email protected]) ; Wang, Jian([email protected]) |
| Source Publication | ACTA MATERIALIA
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| 2022-06-15 | |
| Volume | 232Pages:12 |
| ISSN | 1359-6454 |
| Abstract | Shear transformation, such as twinning and martensitic phase transformation, is generally unidirectional under monotonic thermal or mechanical loading. Here, we report the dynamically reversible shear transformations in a CrMnFeCoNi high-entropy alloy (HEA) under uniaxial tension at the extremely low temperature of 4.2 K. Since stacking fault energy (SFE) of CrMnFeCoNi HEA with a face-centered cubic (fcc) structure is low and decreases with decreasing temperature, plastic deformation is accommodated by dislocation slips and shear transformation bands, such as {111} stacking faults (SFs), {111} nano-twins and fcc -> hcp (hexagonal close-packed structure) shear transformation bands. When deformed at 4.2 K, the lower SFE promotes fcc -> hcp shear transformation, forming hcp grains. Besides basal and non-basal dislocation slips in hcp grains, high-density {0 0 01} SFs and {1 0 1 over line 1} nano-twinning are activated to accommodate plastic deformation. More intriguingly, reverse hcp -> fcc shear transformations are stimulated by deformation-induced local dissipative heating. The reversible fcc <-> hcp shear transformations and both {1 0 1 over line 1} and {111} nano-twinning lead to dynamic nano-laminated dual-phase (NL-DP) structures, which advances the monotonic "dynamic Hall-Petch" effect in enhancing strength, strain-hardening ability, and ductility by dynamically tailoring the type and width of shear transformation bands. Our work provides a promising strategy for evading the strength-ductility dilemma via dynamically developing NL-DP structures through activating reversible shear transformations.(c) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Keyword | High-entropy alloy Deformation twinning Martensitic phase transformations Mechanical properties High-resolution electron microscope |
| DOI | 10.1016/j.actamat.2022.117937 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000796619700002 |
| WOS Keyword | INDUCED PLASTICITY STEEL ; PHASE-TRANSFORMATION ; DEFORMATION ; MECHANISMS ; BEHAVIOR ; METALS |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Funding Project | National Natural Science Foundation of China[52002109] ; National Natural Science Foundation of China[51771201] ; National Natural Science Foundation of China[52071124] ; Natural Science Foundation of the Hebei province[E2020202088] ; Natural Science Foundation of the Hebei province[E2021202135] ; Natural Science Foundation of Tianjin[20JCZDJC00440] ; Overseas Scientists Sponsorship Program by Hebei Province[C20210331] ; Open Research Fund from the State Key Laboratory of Rolling and Automation, Northeastern University[2020RALKFKT002] |
| Funding Organization | National Natural Science Foundation of China ; Natural Science Foundation of the Hebei province ; Natural Science Foundation of Tianjin ; Overseas Scientists Sponsorship Program by Hebei Province ; Open Research Fund from the State Key Laboratory of Rolling and Automation, Northeastern University |
| Classification | 一类 |
| Ranking | 3+ |
| Contributor | Zheng, Shijian ; Wang, Jian |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/89538 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Hebei Univ Technol, Sch Mat Sci & Engn, State Key Lab Reliabil & Intelligence Elect Equip, Tianjin 300401, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 3.Univ Nebraska, Mech & Mat Engn, Lincoln, NE 68588 USA |
| Recommended Citation GB/T 7714 | Ming, Kaisheng,Li, Bo,Bai, Lichen,et al. Dynamically reversible shear transformations in a CrMnFeCoNi high-entropy alloy at cryogenic temperature[J]. ACTA MATERIALIA,2022,232:12.Rp_Au:Zheng, Shijian, Wang, Jian |
| APA | Ming, Kaisheng.,Li, Bo.,Bai, Lichen.,姜萍.,武晓雷.,...&Wang, Jian.(2022).Dynamically reversible shear transformations in a CrMnFeCoNi high-entropy alloy at cryogenic temperature.ACTA MATERIALIA,232,12. |
| MLA | Ming, Kaisheng,et al."Dynamically reversible shear transformations in a CrMnFeCoNi high-entropy alloy at cryogenic temperature".ACTA MATERIALIA 232(2022):12. |
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