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Gradient cell-structured high-entropy alloy with exceptional strength and ductility
Pan, Qingsong1; Zhang, Liangxue1,2; Feng, Rui3; Lu, Qiuhong1; An, Ke3; Chuang, Andrew Chihpin4; Poplawsky, Jonathan D.5; Liaw, Peter K.6; Lu, Lei1
Corresponding AuthorLu, Lei(llu@imr.ac.cn)
2021-11-19
Source PublicationSCIENCE
ISSN0036-8075
Volume374Issue:6570Pages:984-+
AbstractSimilar to conventional materials, most multicomponent high-entropy alloys (HEAs) lose ductility as they gain strength. In this study, we controllably introduced gradient nanoscaled dislocation cell structures in a stable single-phase HEA with face-centered cubic structure, thus resulting in enhanced strength without apparent loss of ductility. Upon application of strain, the sample-level structural gradient induces progressive formation of a high density of tiny stacking faults (SFs) and twins, nucleating from abundant low-angle dislocation cells. Furthermore, the SF-induced plasticity and the resultant refined structures, coupled with intensively accumulated dislocations, contribute to plasticity, increased strength, and work hardening. These findings offer a promising paradigm for tailoring properties with gradient dislocation cells at the nanoscale and advance our fundamental understanding of the intrinsic deformation behavior of HEAs.
DOI10.1126/science.abj8114
Indexed BySCI
Language英语
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000720789200034
PublisherAMER ASSOC ADVANCEMENT SCIENCE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/167531
Collection中国科学院金属研究所
Corresponding AuthorLu, Lei
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37831 USA
4.Argonne Natl Lab, Adv Photon Source, Lemont, IL 60439 USA
5.Oak Ridge Natl Lab, Ctr Nanophases Mat Sci, Oak Ridge, TN 37831 USA
6.Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
Recommended Citation
GB/T 7714
Pan, Qingsong,Zhang, Liangxue,Feng, Rui,et al. Gradient cell-structured high-entropy alloy with exceptional strength and ductility[J]. SCIENCE,2021,374(6570):984-+.
APA Pan, Qingsong.,Zhang, Liangxue.,Feng, Rui.,Lu, Qiuhong.,An, Ke.,...&Lu, Lei.(2021).Gradient cell-structured high-entropy alloy with exceptional strength and ductility.SCIENCE,374(6570),984-+.
MLA Pan, Qingsong,et al."Gradient cell-structured high-entropy alloy with exceptional strength and ductility".SCIENCE 374.6570(2021):984-+.
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