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Faceting-roughening of twin grain boundaries.(E-MRS MACAN)

Straumal, B.B. ; Baretzky, B. ; Kogtenkova, O.A. ; Gornakova, A.S. ; Sursaeva, V.G.

Journal of Materials Science, Feb 15, 2012, Vol.47(4), p.1641(6) [Tạp chí có phản biện]

ISSN: 0022-2461

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  • Nhan đề:
    Faceting-roughening of twin grain boundaries.(E-MRS MACAN)
  • Tác giả: Straumal, B.B. ; Baretzky, B. ; Kogtenkova, O.A. ; Gornakova, A.S. ; Sursaeva, V.G.
  • Chủ đề: Grain Boundaries
  • Là 1 phần của: Journal of Materials Science, Feb 15, 2012, Vol.47(4), p.1641(6)
  • Mô tả: The coincidence site lattice (CSL) plays a similar role for grain boundaries (GB) as the crystal lattice plays for free surfaces. The most densely packed CSL is the twinrelated CSL, characterized by an inverse density of coincidence sites [SIGMA] = 3. Phase diagrams in coordinates "relative temperature T/[T.sub.m]--misorientation angle [theta]--inclination angle [phi]" were constructed for the twin GBs in Cu, Al, and Mo having different stacking fault energy [gamma]. At low [gamma] the twin GB remains faceted at all [phi] values and the number of crystallographically different facets increases with decreasing temperature. With increasing [gamma] asymmetric twin GBs become more and more rough, and fewer facets appear with decreasing temperature. Also, with increasing [gamma] the facets start to degenerate of into the first order rough-to-rough ridges. The behavior of twin GBs in Cu, Al, and Mo is compared with that of twin GBs in Zn.
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0022-2461

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