Processing parameter influence on texture and microstructural evolution in cu-nb multilayer composites fabricated via accumulative roll bonding

John S. Carpenter, Rodney J. McCabe, Shijian J. Zheng, Thomas A. Wynn, Nathan A. Mara, Irene J. Beyerlein

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

A combination of accumulative roll bonding and rolling is used to fabricate bulk sheets of multilayer Cu-Nb bimetallic composites. Alterations in the processing sequence are made in comparison with prior studies in order to expand the processing window available for bimetallic multilayer composites. Cu-Nb composites with layer thicknesses ranging from 45 μm to 10 nm with accompanying total strains of 3.8 to 12.21 are characterized via neutron diffraction, electron back scatter diffraction, and transmission electron microscopy. These characterization methods provide microstructural information such as layer morphology and grain morphology as well as orientation information such as texture and interface plane normal distribution. The evolution of these microstructural characteristics is collected as a function of increasing strain. These results can provide guidance, inputs, and validation for multiscale predictive models that are being developed on materials with interfacially-driven properties. Finally, synthesis pathways are presented that allow the fabrication of nanoscale multilayer composites with predominant interfacial structures. These fabricated materials are ideal for exploring the relative importance between inter-phase interfacial density and atomic interfacial structure in determining material properties.

Original languageEnglish (US)
Pages (from-to)2192-2208
Number of pages17
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume45
Issue number4
DOIs
StatePublished - Apr 2014

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