Tailoring planar slip to achieve pure metal-like ductility in body-centred-cubic multi-principal element alloys

Wang, Liang1,2; Ding, Jun3; Chen, Songshen1; Jin, Ke1,4; Zhang, Qiuhong1; Cui, Jiaxiang1; Wang, Benpeng1; Chen, Bing5; Li, Tianyi6; Ren, Yang7,8; Zheng, Shijian9; Ming, Kaisheng9; Lu, Wenjun10; Hou, Junhua10; Sha, Gang11; Liang, Jun2; Wang, Lu1; Xue, Yunfei1; Ma, En3

2023-04-01

10.1038/s41563-023-01517-0

NATURE MATERIALS   影响因子和分区

1476-1122

1476-4660

["Uniform tensile ductility (UTD) is crucial for the forming/machining capabilities of structural materials. Normally, planar-slip induced narrow deformation bands localize the plastic strains and hence hamper UTD, particularly in body-centred-cubic (bcc) multi-principal element high-entropy alloys (HEAs), which generally exhibit early necking (UTD < 5%). Here we demonstrate a strategy to tailor the planar-slip bands in a Ti-Zr-V-Nb-Al bcc HEA, achieving a 25% UTD together with nearly 50% elongation-to-failure (approaching a ductile elemental metal), while offering gigapascal yield strength. The HEA composition is designed not only to enhance the B2-like local chemical order (LCO), seeding sites to disperse planar slip, but also to generate excess lattice distortion upon deformation-induced LCO destruction, which promotes elastic strains and dislocation debris to cause dynamic hardening. This encourages second-generation planar-slip bands to branch out from first-generation bands, effectively spreading the plastic flow to permeate the sample volume. Moreover, the profuse bands frequently intersect to sustain adequate work-hardening rate (WHR) to large strains. Our strategy showcases the tuning of plastic flow dynamics that turns an otherwise-undesirable deformation mode to our advantage, enabling an unusual synergy of yield strength and UTD for bcc HEAs.","This work shows that by designing appropriate alloying elements in a body-centred-cubic high-entropy alloy, local chemical order and lattice distortion can be tuned, which influences the evolution of planar-slip bands, realizing pure-metal-like tensile ductility at gigapascal yield strength."]

SCI ; EI

英语

ESI高被引 ; NI论文

其他

National Youth Talents Program["U2241234","52231001","2019M660482"] ; 111 Project[12004294] ; HPC platform of Xi'an Jiaotong University[BP2018008] ; Key Project of Natural Science Foundation of Tianjin[2022YFE03120000] ; US Department of Energy[9610533] ; null[20JCZDJC00440] ; null[DE-AC02-06CH11357]

Chemistry ; Materials Science ; Physics

Chemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000966657800003

NATURE PORTFOLIO

20231613893308

Aluminum alloys ; Ductile fracture ; Ductility ; Entropy ; High-entropy alloys ; Niobium alloys ; Plastic flow ; Strain ; Strain hardening ; Titanium alloys ; Zircaloy ; Zirconium compounds

Metallurgy and Metallography:531 ; Heat Treatment Processes:537.1 ; Aluminum Alloys:541.2 ; Titanium and Alloys:542.3 ; Chromium and Alloys:543.1 ; Iron Alloys:545.2 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermodynamics:641.1 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Beijing Inst Technol, Sch Mat Sci & Engn, Beijing, Peoples R China
2.Beijing Inst Technol, Inst Adv Struct Technol, Beijing, Peoples R China
3.Xi An Jiao Tong Univ, Ctr Alloy Innovat & Design CAID, State Key Lab Mech Behav Mat, Xian, Peoples R China
4.Beijing Inst Technol, Adv Res Inst Multidisciplinary Sci, Beijing, Peoples R China
5.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian, Peoples R China
6.Argonne Natl Lab, Xray Sci Div, Argonne, IL USA
7.City Univ Hong Kong, Dept Phys, Kowloon, Hong Kong, Peoples R China
8.City Univ Hong Kong, Ctr Neutron Scattering, Kowloon, Hong Kong, Peoples R China
9.Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin Key Lab Mat Laminating Fabricat & Interfac, Tianjin, Peoples R China
10.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen, Peoples R China
11.Nanjing Univ Sci & Technol, Herbert Gleiter Inst Nanosci, Sch Mat Sci & Engn, Nanjing, Peoples R China

Wang, Liang,Ding, Jun,Chen, Songshen,et al. Tailoring planar slip to achieve pure metal-like ductility in body-centred-cubic multi-principal element alloys[J]. NATURE MATERIALS,2023,22(8):950-957.

Wang, Liang.,Ding, Jun.,Chen, Songshen.,Jin, Ke.,Zhang, Qiuhong.,...&Ma, En.(2023).Tailoring planar slip to achieve pure metal-like ductility in body-centred-cubic multi-principal element alloys.NATURE MATERIALS,22(8),950-957.

Wang, Liang,et al."Tailoring planar slip to achieve pure metal-like ductility in body-centred-cubic multi-principal element alloys".NATURE MATERIALS 22.8(2023):950-957.