<p>Tensile mechanical properties of CoCrFeNiTiAl high entropy alloy via molecular dynamics simulations</p>

doi:10.1016/j.intermet.2021.107444

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

	Tensile mechanical properties of CoCrFeNiTiAl high entropy alloy via molecular dynamics simulations
	Sun, Zhi Hui 3; Zhang, Jie 3; Xin, Gao Xin 1,2; Xie, Lu 3; Yang, Li Chun 3; Peng, Qing 1
刊名	INTERMETALLICS
	2022-03-01
卷号	142 页码:7
关键词	High-entropy alloy Tensile mechanical properties Temperature effect Molecular dynamics
ISSN号	0966-9795
DOI	10.1016/j.intermet.2021.107444
通讯作者	Xie, Lu(xielu@ustb.edu.cn) ; Peng, Qing(pengqing@imech.ac.cn)
英文摘要	High-entropy alloys (HEAs) are a new type of multi-principal metal materials that exhibit excellent mechanical properties, good thermal stability, and high corrosion resistance, with versatile potential applications. In this paper, we have investigated CoCrFeNi(Al0.3Ti0.2)(x) HEA with different Ti and Al contents using XRD, tensile testing, and molecular dynamics simulations. The effects of Ti and Al contents and temperature on the mechanical properties were also explored. The experimental results showed that the CoCrFeNi(Al0.3Ti0.2)(x) HEAs were mainly composed of the FCC matrix phase and gamma' phase (Ni-3(Al, Ti)) after rolling and annealing. The addition of Ti and Al induced the formation of high-temperature strengthening phases in the CoCrFeNi HEA, which significantly improved the mechanical properties. The molecular dynamics simulations also indicates that the elastic modulus and tensile strength of CoCrFeNi(Al0.3Ti0.2)(x) HEA are steadily improved with the Ti and Al addition. The tensile strength increases with the dislocation density. Besides, we have performed a high-temperature mechanical characterization of the CoCrFeNiAl0.225Ti0.15 HEA. The experimental data have revealed that the material's strength continuously declines with stretching temperature, opposed to that of toughness. The high-temperature tensile modulus of elasticity decreases with the temperature. Temperature also diminishes the tensile strength due to the average reduction of the dislocation density.
资助项目	National Key R&D Program of China[2020YFA0405700] ; Fundamental Research Funds for the Central Universities[FRF-MP-20-31] ; LiYing Program of the Institute of Mechanics, Chinese Academy of Sciences[E1Z1011001]
WOS关键词	DISLOCATION DENSITY ; MICROSTRUCTURE ; SIZE ; BEHAVIORS ; DECREASE
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000788121100004
资助机构	National Key R&D Program of China ; Fundamental Research Funds for the Central Universities ; LiYing Program of the Institute of Mechanics, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89078]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Xie, Lu; Peng, Qing
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.China Nucl Power Technol Res Inst Co Ltd, Reactor Engn & Safety Res Ctr, Shenzhen 518031, Peoples R China 3.Univ Sci & Technol Beijing, Sch Mech Engn, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Sun, Zhi Hui,Zhang, Jie,Xin, Gao Xin,et al. Tensile mechanical properties of CoCrFeNiTiAl high entropy alloy via molecular dynamics simulations [J]. INTERMETALLICS,2022,142:7.
APA	Sun, Zhi Hui,Zhang, Jie,Xin, Gao Xin,Xie, Lu,Yang, Li Chun,&Peng, Qing.(2022). Tensile mechanical properties of CoCrFeNiTiAl high entropy alloy via molecular dynamics simulations .INTERMETALLICS,142,7.
MLA	Sun, Zhi Hui,et al." Tensile mechanical properties of CoCrFeNiTiAl high entropy alloy via molecular dynamics simulations ".INTERMETALLICS 142(2022):7.