Impact resistance and energy dissipation mechanism of nanocrystalline CoCrNi medium entropy alloy nanofilm under supersonic micro-ballistic impact

doi:10.1016/j.ijplas.2023.103801

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

	Impact resistance and energy dissipation mechanism of nanocrystalline CoCrNi medium entropy alloy nanofilm under supersonic micro-ballistic impact
	Dong, J. L.3; Li, F. . C.1; Gu, Z. . P.2; Jiang, M. Q.2; Liu, Y. . H.1; Wang, G. J.3; Wu, X. Q.2
刊名	INTERNATIONAL JOURNAL OF PLASTICITY
	2023-12-01
卷号	171 页码:11
关键词	Medium entropy alloy nanofilm Impact resistance Solid-state amorphization Energy dissipation mechanism
ISSN号	0749-6419
DOI	10.1016/j.ijplas.2023.103801
通讯作者	Wang, G. J.(wangguiji2003@163.com) ; Wu, X. Q.(wuxianqian@imech.ac.cn)
英文摘要	A fundamental understanding of the mechanical behavior of materials subjected to dynamic loading is critical for developing outstanding structural materials. In this paper, we used laser induced high-velocity (500 similar to 800 m/s) micro-projectile impact experiments to measure the impact response of 100 nm thick CoCrNi medium entropy alloy (MEA) nanofilm. The results revealed that the CoCrNi MEA nanofilm exhibits high specific penetration energy (up to 0.882 MJ/kg) and excellent impact resistance, significantly surpassing traditional protective materials. The specific penetration energy of CoCrNi MEA nanofilm is approximately 1.8 to 2.2 times that of steel and 1.2 to 1.4 times that of Kevlar composite plates. Based on the post-impact analysis, we observed abundant energy dissipation pathways including multiple cracks, bending of cracking induced petals, mechanical twins, and, of particular note, amorphization for the nanocrystalline CoCrNi MEA nanofilm. Such solid-state amorphization stemming from severe lattice distortion activates a new mechanism for impact energy dissipation. The versatility and synergy of these deformation mechanisms contribute to the exceptional protective performance of the nano crystalline CoCrNi MEA nanofilms. The specific penetration energy of the nanocrystalline CoCrNi MEA nanofilm is about 21% higher compared to that of the amorphous CoCrNi MEA nanofilm due to the additional energy dissipation mechanisms arising from mechanical twins and amorphization. This study provides valuable physical insights into the impact resistance and energy dissipation mechanisms of MEA nanofilm and highlights its potential as a high-performance coating to enhance the surface integrity and reliability of equipment subjected to high-speed collisions of solid particles.
资助项目	National Key R & D Program of China[2021YFA0719200] ; National Natural Science Foundation of China[,12272391] ; National Natural Science Foundation of China[12232020] ; National Natural Science Foundation of China[92166201] ; National Natural Science Foundation of China[12125206] ; CAS Project for Young Scientists in Basic Research[YSBR-096]
WOS关键词	DEFORMATION MECHANISMS ; NOSED PROJECTILES ; BEHAVIOR ; PLATES ; PENETRATION ; PERFORATION ; ABSORPTION ; GRAPHENE ; STATE ; FILMS
WOS研究方向	Engineering ; Materials Science ; Mechanics
语种	英语
WOS记录号	WOS:001121830700001
资助机构	National Key R & D Program of China ; National Natural Science Foundation of China ; CAS Project for Young Scientists in Basic Research
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93610]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Wang, G. J.; Wu, X. Q.
作者单位	1.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 3.China Acad Engn Phys, Inst Fluid Phys, Mianyang 621999, Peoples R China
推荐引用方式 GB/T 7714	Dong, J. L.,Li, F. . C.,Gu, Z. . P.,et al. Impact resistance and energy dissipation mechanism of nanocrystalline CoCrNi medium entropy alloy nanofilm under supersonic micro-ballistic impact[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2023,171:11.
APA	Dong, J. L..,Li, F. . C..,Gu, Z. . P..,Jiang, M. Q..,Liu, Y. . H..,...&Wu, X. Q..(2023).Impact resistance and energy dissipation mechanism of nanocrystalline CoCrNi medium entropy alloy nanofilm under supersonic micro-ballistic impact.INTERNATIONAL JOURNAL OF PLASTICITY,171,11.
MLA	Dong, J. L.,et al."Impact resistance and energy dissipation mechanism of nanocrystalline CoCrNi medium entropy alloy nanofilm under supersonic micro-ballistic impact".INTERNATIONAL JOURNAL OF PLASTICITY 171(2023):11.