کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7881877 | 1509604 | 2014 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructural evolution of nanolayered Cu-Nb composites subjected to high-pressure torsion
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Microstructural evolution of nanolayered Cu-Nb composites subjected to high-pressure torsion Microstructural evolution of nanolayered Cu-Nb composites subjected to high-pressure torsion](/preview/png/7881877.png)
چکیده انگلیسی
Bulk nanolayered Cu/Nb composites fabricated by accumulative roll bonding (ARB), leading to a nominal layer thickness of 18Â nm, were subjected to large shear deformation by high-pressure torsion at room temperature. The evolution of the microstructure was characterized using X-ray diffraction, transmission electron microscopy and atom probe tomography. At shear strains of â¼4, the crystallographic texture started to change from the one stabilized by ARB, with a Kurdjumov-Sachs orientation relationship and a dominant {1Â 1Â 2}Cu||{1Â 1Â 2}Nb interface plane, toward textures unlike the shear texture of monolithic Cu and Nb. At larger strains, exceeding 10, the initial layered structure was progressively replaced by a three-dimensional Cu-Nb nanocomposite. This structure remained stable with respect to grain size, morphology and global texture from strains of â¼290 to the largest ones used in this study, 5900. The three-dimensional self-organized nanocomposites comprised biconnected Cu-rich and Nb-rich regions, with a remarkably small coexistence length scale, â¼10Â nm. The results are discussed in the context of the effect of severe plastic deformation and strain path on microstructure and texture stability in highly immiscible alloy systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 72, 15 June 2014, Pages 178-191
Journal: Acta Materialia - Volume 72, 15 June 2014, Pages 178-191
نویسندگان
E.H. Ekiz, T.G. Lach, R.S. Averback, N.A. Mara, I.J. Beyerlein, M. Pouryazdan, H. Hahn, P. Bellon,