Faceted Kurdjumov-Sachs interface-induced slip continuity in the eutectic high-entropy alloy, AlCoCrFeNi2.1

doi:10.1016/j.jmst.2020.04.073

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	Faceted Kurdjumov-Sachs interface-induced slip continuity in the eutectic high-entropy alloy, AlCoCrFeNi2.1
	Xiong, Ting 7,8; Yang, Wenfan 7,8; Zheng, Shijian 7,9; Liu, Zhaorui 1,2; Lu, Yiping 3; Zhang, Ruifeng 1,2; Zhou, Yangtao 7; Shao, Xiaohong 7; Zhang, Bo 7; Wang, Jun 4
	2021-02-28
关键词	Crystal lattices Ductility Entropy Eutectics High-entropy alloys TransmissionsCoincidence site lattices Formation mechanism Geometrical analysis Interface resistance Lamellar microstructure Orientation relationship Strength and ductilities Strengthening effect
卷号	65
DOI	10.1016/j.jmst.2020.04.073
页码	216-227
英文摘要	Recently, the eutectic high-entropy alloy (EHEA), AlCoCrFeNi2.1, can reach a good balance of strength and ductility. The dual-phase alloy exhibits a eutectic lamellar microstructure with large numbers of interfaces. However, the role of the interfaces in plastic deformation have not been revealed deeply. In the present work, the orientation relationship (OR) of the interfaces has been clarified as the Kurdjumov-Sachs (KS) interfaces presenting 111B2\|\|110FCC and 110B2\|\|111FCC independent of their morphologies. There exist three kinds of interfaces in the EHEA, namely, (321)B2\|\|(112)FCC, (011)B2\|\|(332)FCC, and (231)B2\|\|(552)FCC. The dominating (321)B2\|\|(112)FCC interface and the secondary (011)B2\|\|(332)FCC interface are both non-slip planes and atomistic-scale faceted, facilitating the nucleation and slip transmission of the dislocations. The formation mechanism of the preferred interfaces is revealed using the atomistic geometrical analysis according to the criteria of the low interfacial energy based on the coincidence-site lattice (CSL) theory. In particular, the ductility of the dual-phase alloy originates from the KS interface-induced slip continuity across interfaces, which provides a high slip-transfer geometric factor. Moreover, the strengthening effect can be attributed to the interface resistance for the dislocation transmission due to the mismatches of the moduli and lattice parameters at the interfaces. © 2020
会议录	Journal of Materials Science and Technology
会议录出版者	Chinese Society of Metals
语种	英语
ISSN号	10050302
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000609935300022
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/132724]
专题	材料科学与工程学院_特聘教授组
作者单位	1.School of Materials Science and Engineering, Beihang University, Beijing; 100191, China; 2.Center for Integrated Computational Materials Engineering (International Research Institute for Multidisciplinary Science) and Key Laboratory of High-Temperature Structural Materials & Coatings Technology (Ministry of Industry and Information Technology), Beihang University, Beijing; 100191, China; 3.Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian; 116024, China; 4.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an; 710072, China; 5.Department of Materials Science and Engineering, The University of Tennessee, Knoxville; TN; 37996, United States; 6.School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China 7.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang; 110016, China; 8.School of Material Science and Engineering, University of Science and Technology of China, Hefei; 230026, China; 9.Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, School of Materials Science and Engineering, Hebei University of Technology, Tianjin; 300130, China;
推荐引用方式 GB/T 7714	Xiong, Ting,Yang, Wenfan,Zheng, Shijian,et al. Faceted Kurdjumov-Sachs interface-induced slip continuity in the eutectic high-entropy alloy, AlCoCrFeNi2.1[C]. 见:.