题名: High strength and thermal stability of bulk Cu/Ta nanolamellar multilayers fabricated by cross accumulative roll bonding
作者: Zhang, T.2; Zeng, L. F.1,2; Gao, R.2; Fang, Q. F.1,2; Wang, X. P.2; Hao, T.2; Xie, Z. M.1,2; Miao, S.1,2
刊名: ACTA MATERIALIA
出版日期: 2016-05-15
卷号: 110, 期号:无, 页码:341-351
关键词: Nanolamellar multilayers ; Orientation relationships ; High-strength ; Cross accumulative roll bonding
英文摘要: Bulk Cu/Ta nanolamellar multilayers with an individual layer thickness from several micrometers down to 50 nm were successfully fabricated via a combination of cross accumulative roll bonding (CARB) and an intermediate annealing step. This fabrication technique allowed to effectively suppress the formation of plastic instabilities and edge cracks during the repeated rolling process. A transition of the layered morphology from non-planar interfaces at the submicron level to nearly planar interfaces at the nano scale was observed with decreasing layer thickness. High resolution transmission electron microscopy, selected area electron diffraction and X-ray diffraction were performed, and the results indicate that the Cu/Ta nanolamellar multilayers with a layer thickness of 50 nm show a {100}(Ta)[110]parallel to{110}(Cu)[111] rolling texture relationship. Tensile tests revealed that the ultimate tensile strength of the composite was up to 950 MPa, which is approximately 5 times higher than that of the initial pure Cu and Ta. The hardness of the prepared multilayer maintained unchanged even after an annealing at 500 degrees C for 1 h. These unique properties are attributed to an atomically flat bimetal interface and the low amount of homophase grain boundaries resulted from the CARB process. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
WOS标题词: Science & Technology ; Technology
类目[WOS]: Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
研究领域[WOS]: Materials Science ; Metallurgy & Metallurgical Engineering
关键词[WOS]: SEVERE PLASTIC-DEFORMATION ; ULTRA-HIGH STRENGTH ; NANOLAYERED COMPOSITES ; MECHANICAL-PROPERTIES ; MICROSTRUCTURAL EVOLUTION ; TEXTURE EVOLUTION ; BIMETAL INTERFACES ; DIFFUSION BARRIER ; METAL COMPOSITES ; GRAIN-GROWTH
收录类别: SCI
语种: 英语
WOS记录号: WOS:000374810400034
Citation statistics:
内容类型: 期刊论文
URI标识: [http://ir.hfcas.ac.cn:8080/handle/334002/22091]  
Appears in Collections:合肥物质科学研究院_中科院固体物理研究所_期刊论文


作者单位: 1.Univ Sci & Technol China, Hefei 230026, Peoples R China
2.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

Recommended Citation:
L.F. Zeng,R. Gao,Q.F. Fang,et al. High strength and thermal stability of bulk Cu/Ta nanolamellar multilayers fabricated by cross accumulative roll bonding[J]. ACTA MATERIALIA,2016,110(无):341-351.
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