کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1445389 | 1509584 | 2015 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Bulk texture evolution of nanolamellar Zr-Nb composites processed via accumulative roll bonding
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
It was recently demonstrated that bulk two-phase 50/50 Zr-Nb nanolayered composites with 90Â nm individual layers can be fabricated from an initial coarse-layered composite with 1Â 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 {1Â 1Â 2}ã1Â 1Â 0ã slip and {1Â 1Â 0}ã1Â 1Â 0ã slip. In the Zr phase the model suggests that the texture develops due to a predominance of prismatic ãaã and basal ãaã slip.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 92, 15 June 2015, Pages 97-108
Journal: Acta Materialia - Volume 92, 15 June 2015, Pages 97-108
نویسندگان
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,