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

IMECH-IR > 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.1; Li, F. . C.3; Gu, Z. . P.2; Jiang, M. Q.2; Liu, Y. . H.3; Wang, G. J.1; Wu, X. Q.2
通讯作者	Wang, G. J.(wangguiji2003@163.com) ; Wu, X. Q.(wuxianqian@imech.ac.cn)
发表期刊	INTERNATIONAL JOURNAL OF PLASTICITY
	2023-12-01
卷号	171 页码:11
ISSN	0749-6419
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.
关键词	Medium entropy alloy nanofilm Impact resistance Solid-state amorphization Energy dissipation mechanism
DOI	10.1016/j.ijplas.2023.103801
收录类别	SCI
语种	英语
WOS记录号	WOS:001121830700001
关键词[WOS]	DEFORMATION MECHANISMS ; NOSED PROJECTILES ; BEHAVIOR ; PLATES ; PENETRATION ; PERFORATION ; ABSORPTION ; GRAPHENE ; STATE ; FILMS
WOS研究方向	Engineering ; Materials Science ; Mechanics
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics
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]
项目资助者	National Key R & D Program of China ; National Natural Science Foundation of China ; CAS Project for Young Scientists in Basic Research
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/93611
专题	非线性力学国家重点实验室流固耦合系统力学重点实验室
通讯作者	Wang, G. J.; Wu, X. Q.
作者单位	1.China Acad Engn Phys, Inst Fluid Phys, Mianyang 621999, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Phys, Beijing 100190, 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.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Jp2023Fa148.pdf（7962KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载