"Self-sharpening" tungsten high-entropy alloy

doi:10.1016/j.actamat.2020.01.005

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	"Self-sharpening" tungsten high-entropy alloy
	Liu XF(刘兴发)1,3,4; 田智立1,2); Zhang XF 2; Chen HH 2; Liu TW(刘天威)1,3,4; Chen Y(陈艳)1,3,4; Wang YJ(王云江)1,3,4; Dai LH(戴兰宏)1,3,4
刊名	ACTA MATERIALIA
	2020-03-01
卷号	186 页码:257-266
关键词	High-entropy alloy Tungsten alloy Self-sharpening Shear band Dynamic recrystallization
ISSN号	1359-6454
DOI	10.1016/j.actamat.2020.01.005
通讯作者	Dai, Lan-Hong(lhdai@lnm.imech.ac.cn)
英文摘要	"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.
分类号	一类
资助项目	NSFC[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
WOS关键词	ADIABATIC SHEAR-BAND ; SOLID-SOLUTION ; DYNAMIC RECRYSTALLIZATION ; MECHANICAL-PROPERTIES ; METALLIC-GLASS ; PARTICLE-SIZE ; DEFORMATION ; BEHAVIOR ; LOCALIZATION ; DEPENDENCE
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000518698300024
资助机构	NSFC ; 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
其他责任者	Dai, Lan-Hong
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/81834]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China; 2.Nanjing Univ Sci & Technol, Sch Mech Engn, Nanjing 210094, Peoples R China 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 4.CAS Ctr Excellence Complex Syst Mech, Beijing 100190, Peoples R China;
推荐引用方式 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.