A high-entropy alloy syntactic foam with exceptional cryogenic and dynamic properties

doi:10.1016/j.msea.2023.145146

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

	A high-entropy alloy syntactic foam with exceptional cryogenic and dynamic properties
	Meng J(孟锦); Qiao Y(乔禹); Chen Y(陈艳); Liu TW(刘天威); Li T(李统); Wang HY(汪海英); Dai LH(戴兰宏)
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2023-06-15
卷号	876 页码:145146
关键词	High entropy alloy Metal foams Energy absorption Cryogenic Shear band High strain rate
ISSN号	0921-5093
DOI	10.1016/j.msea.2023.145146
英文摘要	Metal foams are in great demand in extreme service environments with cryogenic temperatures and high strain rates due to their unique properties. However, the reduced ductility and impact toughness under such conditions limit their applications. In this work, we tested the quasi-static and dynamic compression properties of CoCrFeMnNi high entropy alloy syntactic foam at liquid nitrogen temperature (-196 degrees C). We found that it exhibits ultra-high strengths and energy absorption capacity, especially a superior resistance to embrittlement at cryogenic temperature. Microstructural characterizations reveal that the foam matrix has a high twinning activity and shear localization propensity in cryogenic environments. Dense deformation twins and multiple shear bands intersected, forming a weave-like microstructure that can disperse the deformation and benefits energy absorption. Deformation twins can also strengthen the matrix and delay the crack nucleation and growth. While under dynamic loading, an FCC to HCP phase transformation was activated, forming a nano-laminated dualphase (NLDP) FCC/HCP structure in the matrix, leading to further strengthening and toughening. Deformation twinning and HCP phase transformation act as additional plastic deformation mechanisms along with stacking faults and shear bands to offset the shortcomings caused by limited dislocation movements at low temperatures and high strain rate dynamic loading, enabling the high strength and energy absorption of the syntactic foam.
分类号	一类
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:001042051500001
资助机构	NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics [11988102] ; NSFC [11790292, 11972346, 12002341] ; Ye Qisun Science Foundation of National Natural Science Foundation of China [U2141204] ; Key Research Program of the Chinese Academy of Sciences [ZDRW-CN-2021-2-3]
其他责任者	Chen, Y ; Dai, LH (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/92579]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.{Meng, Jin, Qiao, Yu, Chen, Yan, Liu, Tian-Wei, Li, Tong, Wang, Hai-Ying, Dai, Lan - Hong} Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.{Meng, Jin, Chen, Yan, Li, Tong, Wang, Hai-Ying, Dai, Lan - Hong} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China 3.{Qiao, Yu} Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, Hefei 230027, Peoples R China
推荐引用方式 GB/T 7714	Meng J,Qiao Y,Chen Y,et al. A high-entropy alloy syntactic foam with exceptional cryogenic and dynamic properties[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,876:145146.
APA	孟锦.,乔禹.,陈艳.,刘天威.,李统.,...&戴兰宏.(2023).A high-entropy alloy syntactic foam with exceptional cryogenic and dynamic properties.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,876,145146.
MLA	孟锦,et al."A high-entropy alloy syntactic foam with exceptional cryogenic and dynamic properties".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 876(2023):145146.