Bulk texture evolution of nanolamellar Zr-Nb composites processed via accumulative roll bonding

J. S. Carpenter, T. Nizolek, R. J. McCabe, M. Knezevic, S. J. Zheng, B. P. Eftink, J. E. Scott, S. C. Vogel, T. M. Pollock, N. A. Mara, I. J. Beyerlein

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

It was recently demonstrated that bulk two-phase 50/50 Zr-Nb nanolayered composites with 90 nm individual layers can be fabricated from an initial coarse-layered composite with 1 mm layers via the severe plastic deformation process of accumulative roll bonding. During the deformation, the Zr phase retained its hcp crystal structure and the Zr-Nb interface remained sharp. Here we use a combination of neutron diffraction and dislocation-based polycrystal plasticity constitutive modeling to assess the evolution of texture and deformation mechanisms over a four order-of-magnitude range in layer thickness. The phase textures in the nanocomposite strongly deviate from that of Zr or Nb rolled in monolithic form, becoming highly peaked and intense. The model suggests that texture development in the Nb phase is associated with multiple slip and contributions from both {1 1 2}1 1 0 slip and {1 1 0}1 1 0 slip. In the Zr phase the model suggests that the texture develops due to a predominance of prismatic a and basal a slip.

Original languageEnglish (US)
Pages (from-to)97-108
Number of pages12
JournalActa Materialia
Volume92
DOIs
StatePublished - Jun 15 2015

Bibliographical note

Funding Information:
This work was supported in part by the Center for Materials at Irradiation and Mechanical Extremes, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number 2008LANL1026 . This work was also supported in part by the Los Alamos National Laboratory Directed Research and Development (LDRD) Project 20140348ER . This work was performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is operated by Los Alamos National Security, LLC, for the National Nuclear Security Administration of the U.S. Department of Energy under contract DE-AC52-06NA25396. Neutron diffraction results were collected on the High Pressure Preferred Orientation (HIPPO) beam line at the Los Alamos Neutron Science Center. Electron microscopy was performed at the Los Alamos Electron Microscopy Laboratory.

Keywords

  • Accumulative roll bonding
  • Composites
  • Neutron diffraction
  • Severe plastic deformation
  • Texture

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