Cooperative dislocations for pressure-dependent sequential deformation of multi-principal element alloys under shock loading

Zhang, Fan1,2,3,4; Ren, Yu5; Pei, Zongrui6; Gao, Qingyang1; Lu, Zhen4,7; Wang, Benpeng1; Xue, Yunfei1; Cao, Xumeng8; Du, Kui8; Yang, Yang9; Li, Bin10; Cheng, Xingwang1; Chen, Mingwei2,3,11,12

2024-09-01

10.1016/j.actamat.2024.120150

ACTA MATERIALIA   影响因子和分区

1359-6454

1873-2453

Multi-principal element alloys (MPEAs) are promising materials for structural applications under extreme conditions. Their outstanding mechanical properties are closely related to the activation of multiple deformation modes of dislocation gliding, twinning, and phase transformation that appear in sequence during deformation at low temperatures, high pressures, or high strain rates. However, the inherent correlations among these deformation modes and, thus, underlying deformation mechanisms of MPEAs remain largely unknown. We report softrecovery plate impact experiments of face-centered-cubic (FCC) CrCoNi MPEAs, demonstrating pressuredependent deformation modes from low-pressure stacking faults to medium-pressure twinning and highpressure FCC to hexagonal-close-packed (HCP) phase transformation. Atomic-scale characterizations unveil that the sequential deformation is manipulated by the cooperation of 90 degrees and 30 degrees Shockley partial dislocations at deformation fronts, which is facilitated by low stacking fault energy and pressure-dependent phase stability of the MPEAs. Moreover, the cooperative dislocation behavior can also be observed at twin fronts of shock-loaded CrMnFeCoNi MPEA, validating the universality of the cooperative deformation mode in FCC alloys with a low stacking fault energy. Theoretical analyses suggest that the distinctive cooperative dislocation behavior results in the self-compensation of dislocation strain fields and the minimization of interfacial elastic energy at incoherent twin and FCC/HCP interfaces.

Multi-principal element alloys Cooperative dislocations Soft-recovery shock loading experiment Deformation twins Shock-induced phase transformation

SCI ; EI

英语

通讯

US National Science Foundation[NSF DMR- 1804320] ; National Natural Science Foundation of China["52271141","52331006"] ; National Key R & D Program of China[2021YFB3802900] ; National Key Laboratory Foundation of Science and Technology on Materials under Shock and Impact[WDZC2022-1] ; China Postdoctoral Science Foundation[2021M690012] ; SUSTech[G03050K002]

Materials Science ; Metallurgy & Metallurgical Engineering

Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:001266437300001

PERGAMON-ELSEVIER SCIENCE LTD

20242816671281

Behavioral research ; Chromium alloys ; Cobalt alloys ; Manganese alloys ; Phase transitions ; Stacking faults ; Twinning

Ergonomics and Human Factors Engineering:461.4 ; Chromium and Alloys:543.1 ; Manganese and Alloys:543.2 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Physical Chemistry:801.4 ; Crystal Lattice:933.1.1 ; Crystal Growth:933.1.2 ; Social Sciences:971

MATERIALS SCIENCE

Web of Science

1.Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
2.Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA
3.Johns Hopkins Univ, Hopkins Extreme Mat Inst, Baltimore, MD 21218 USA
4.Tohoku Univ, WPI Adv Inst Mat Res, Sendai 9808577, Japan
5.North China Elect Power Univ, Sch Energy Power & Mech Engn, Beijing 102206, Peoples R China
6.Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA
7.AIST, Math Adv Mat Open Innovat Lab, Sendai 9808577, Japan
8.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
9.Univ Nevada, Dept Chem & Mat Engn, Reno, NV 89557 USA
10.Iowa State Univ, Dept Ind & Mfg Syst Engn, Ames, IA 50011 USA
11.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
12.Southern Univ Sci & Technol, Inst Innovat Mat, Shenzhen 518055, Peoples R China

Zhang, Fan,Ren, Yu,Pei, Zongrui,et al. Cooperative dislocations for pressure-dependent sequential deformation of multi-principal element alloys under shock loading[J]. ACTA MATERIALIA,2024,276.

Zhang, Fan.,Ren, Yu.,Pei, Zongrui.,Gao, Qingyang.,Lu, Zhen.,...&Chen, Mingwei.(2024).Cooperative dislocations for pressure-dependent sequential deformation of multi-principal element alloys under shock loading.ACTA MATERIALIA,276.

Zhang, Fan,et al."Cooperative dislocations for pressure-dependent sequential deformation of multi-principal element alloys under shock loading".ACTA MATERIALIA 276(2024).