Plastic deformation capacity obtained by the process of strain delocalization in Hf0.5Nb0.5Ta0.5Ti1.5Zr multi-principal-element alloy

doi:10.1016/j.intermet.2023.108119

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

	Plastic deformation capacity obtained by the process of strain delocalization in Hf_0.5Nb_0.5Ta_0.5Ti_1.5Zr multi-principal-element alloy
	He, Jinyan 5; Ma, Yan 4; Li, Hongxin 5; Ma, Shizhou 5; Zhang, Xinggao 5; Yuan, Fuping 2,3; Huang, Jacob Chih-Ching 1
刊名	INTERMETALLICS
	2024
卷号	164 页码:8
关键词	Multi-principal element alloy Strain delocalization Strain gradient Lattice distortion
ISSN号	0966-9795
DOI	10.1016/j.intermet.2023.108119
通讯作者	He, Jinyan(hejinyanfhy@163.com) ; Yuan, Fuping(fpyuan@lnm.imech.ac.cn)
英文摘要	Multi-principal element alloys (MPEAs) with body-centered-cubic (BCC) structures composed of elements of IVB, VB, and VIB usually exhibit high compressive strength and superior high-temperature performance. However, premature necking under tensile loading at ambient temperature limits their applications. Herein, we report the Hf0.5Nb0.5Ta0.5Ti1.5Zr MPEA with a single BCC phase, which performs considerable tensile plasticity by the process of strain delocalization. The formation of dispersed slip bands and two major strain localized regions suppress premature necking. The strain-localized region with a larger strain gradient realized strain delocalization during non-uniform deformation, resulting in considerable tensile plasticity (similar to 20%) with a yield strength of 922 MPa. Two dominated work hardening mechanisms were revealed. One is the geometrically necessary dislocations (GNDs) produced by non-uniform deformation which can coordinate deformation incompatibility, thus enhancing plastic deformation capability. The other is the lattice distortion which can provide an easy path for the cross slip of dislocations and realize strain delocalization. These two kinds of work-hardening mechanisms jointly contribute to the significant plastic deformation capacity of the Hf0.5Nb0.5Ta0.5Ti1.5Zr MPEA.
资助项目	National Natural Science Foundation of China[52192591]
WOS关键词	HIGH-ENTROPY ALLOY ; GRADIENT PLASTICITY ; MICROSTRUCTURE ; DUCTILITY
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:001115639000001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93569]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	He, Jinyan; Yuan, Fuping
作者单位	1.City Univ Hong Kong, Hong Kong Inst Adv Study, Dept Mat Sci & Engn, Hong Kong, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 4.City Univ Hong Kong, Dept Mat Sci & Engn, Shenyang Natl Lab Mat Sci, Mech Behav Div, Hong Kong, Peoples R China 5.State Key Lab NBC Protect Civilian, Beijing 102205, Peoples R China
推荐引用方式 GB/T 7714	He, Jinyan,Ma, Yan,Li, Hongxin,et al. Plastic deformation capacity obtained by the process of strain delocalization in Hf_0.5Nb_0.5Ta_0.5Ti_1.5Zr multi-principal-element alloy[J]. INTERMETALLICS,2024,164:8.
APA	He, Jinyan.,Ma, Yan.,Li, Hongxin.,Ma, Shizhou.,Zhang, Xinggao.,...&Huang, Jacob Chih-Ching.(2024).Plastic deformation capacity obtained by the process of strain delocalization in Hf_0.5Nb_0.5Ta_0.5Ti_1.5Zr multi-principal-element alloy.INTERMETALLICS,164,8.
MLA	He, Jinyan,et al."Plastic deformation capacity obtained by the process of strain delocalization in Hf_0.5Nb_0.5Ta_0.5Ti_1.5Zr multi-principal-element alloy".INTERMETALLICS 164(2024):8.