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Microstructural evolution and electro-resistivity in HPT nickel.(Report)

Korznikova, E. A. ; Mironov, S. Yu. ; Korznikov, A. V. ; Zhilyaev, A. P. ; Langdon, Terence G.

Materials Science & Engineering A, Oct 30, 2012, Vol.556, p.437(9) [Tạp chí có phản biện]

ISSN: 0921-5093

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  • Nhan đề:
    Microstructural evolution and electro-resistivity in HPT nickel.(Report)
  • Tác giả: Korznikova, E. A. ; Mironov, S. Yu. ; Korznikov, A. V. ; Zhilyaev, A. P. ; Langdon, Terence G.
  • Chủ đề: Mechanical Engineering -- Analysis ; Nickel (Metal) -- Analysis ; Universities And Colleges -- Analysis ; Hardness (Materials) -- Analysis
  • Là 1 phần của: Materials Science & Engineering A, Oct 30, 2012, Vol.556, p.437(9)
  • Mô tả: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.msea.2012.07.010 Byline: E.A. Korznikova (a), S.Yu. Mironov (a)(b), A.V. Korznikov (a), A.P. Zhilyaev (a)(c), Terence G. Langdon (c)(d) Keywords: High pressure torsion; Nickel; Electron backscatter diffraction; Microhardness; Electro-resistivity Abstract: Microstructural evolution of pure nickel was studied in the very early stages of high-pressure torsioning. It is shown that the microhardness becomes sufficiently homogeneous across the disks after one-half of a complete revolution. An analysis by EBSD supports this finding showing almost identical EBSD microstructures for HPT through more than 0.5 rotation. Electrical resistivity measurements correlate with the microhardness and EBSD data showing a maximum value at the strain corresponding to 0.5 rotation. The results suggest that the main source of electron scattering is point defects and dislocations. Author Affiliation: (a) Institute for Metals Superplasticity Problems, Russian Academy of Science, 39 Khalturin Str., Ufa, 450001, Russia (b) Department of Materials Processing, Graduate School of Engineering, Tohoku University, 6-6-02 Aramaki-aza-Aoba, Sendai 980-8579, Japan (c) Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK (d) Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-1453, USA Article History: Received 20 March 2012; Revised 16 June 2012; Accepted 1 July 2012
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0921-5093

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