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"Self-sharpening" tungsten high-entropy alloy
Liu XF(刘兴发)1,2,3; 田智立1,2); Zhang XF4; Chen HH4; Liu TW(刘天威)1,2,3; Chen Y(陈艳)1,2,3; Wang YJ(王云江)1,2,3; Dai LH(戴兰宏)1,2,3
Corresponding AuthorDai, Lan-Hong(
Source PublicationACTA MATERIALIA
Abstract"Self-sharpening", a material maintaining its acute head shape during penetration, is highly desirable in a wide range of engineering applications. However, it remains a great challenge to make it occur in conventional single-principal-element alloys. Here, we develop a new chemical-disordered multi-phase tungsten high-entropy alloy that exhibits outstanding self-sharpening capability, in sharp contrast to conventional tungsten alloys only showing mushrooming. This alloy consists of a BCC dendrite phase and a rhombohedral phase embedded in the continuous FCC matrix, and such a unique microstructure leads to a 10-20% better penetration performance than conventional tungsten heavy alloys. We show that emergence of the self-sharpening is triggered by the ultrastrong phase stimulated dynamic recrystallization softening mediated shear banding. This study sheds light on the origin of self-sharpening and might open new opportunities for developing high-performance penetrator materials. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
KeywordHigh-entropy alloy Tungsten alloy Self-sharpening Shear band Dynamic recrystallization
Indexed BySCI ; EI
WOS IDWOS:000518698300024
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding ProjectNSFC[11790292] ; NSFC[51901235] ; National Key Research and Development Program of China[2017YFB0702003] ; Strategic Priority Research Program[XDB22040302] ; Strategic Priority Research Program[XDB22040303] ; Key Research Program of Frontier Sciences[QYZDJSSW-JSC011] ; Youth Promotion Association of Chinese Academy of Sciences
Funding OrganizationNSFC ; National Key Research and Development Program of China ; Strategic Priority Research Program ; Key Research Program of Frontier Sciences ; Youth Promotion Association of Chinese Academy of Sciences
ContributorDai, Lan-Hong
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China;
3.CAS Ctr Excellence Complex Syst Mech, Beijing 100190, Peoples R China;
4.Nanjing Univ Sci & Technol, Sch Mech Engn, Nanjing 210094, Peoples R China
Recommended Citation
GB/T 7714
Liu XF,田智立1,2),Zhang XF,et al. "Self-sharpening" tungsten high-entropy alloy[J]. ACTA MATERIALIA,2020,186:257-266.
APA 刘兴发.,田智立1,2).,Zhang XF.,Chen HH.,刘天威.,...&戴兰宏.(2020)."Self-sharpening" tungsten high-entropy alloy.ACTA MATERIALIA,186,257-266.
MLA 刘兴发,et al.""Self-sharpening" tungsten high-entropy alloy".ACTA MATERIALIA 186(2020):257-266.
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