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New Materials Science Findings from Technical University Reported (Microstructural evolution of nanolayered Cu-Nb composites subjected to...

July 1, 2014

New Materials Science Findings from Technical University Reported (Microstructural evolution of nanolayered Cu-Nb composites subjected to high-pressure torsion)

By a News Reporter-Staff News Editor at Journal of Technology -- Researchers detail new data in Materials Science. According to news reporting originating in Darmstadt, Germany, by VerticalNews journalists, research stated, "Bulk nanolayered Cu/Nb composites fabricated by accumulative roll bonding (ARB), leading to a nominal layer thickness of 18 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."

The news reporters obtained a quote from the research from Technical University, "At shear strains of the crystallographic texture started to change from the one stabilized by ARB, with a Kurdjumov-Sachs orientation relationship and a dominant {1 1 2}(Cu)parallel to{1 1 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 similar to 290 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, similar to 10 nm."

According to the news reporters, the research concluded: "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."

For more information on this research see: Microstructural evolution of nanolayered Cu-Nb composites subjected to high-pressure torsion. Acta Materialia, 2014;72():178-191. Acta Materialia can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier -; Acta Materialia -

Our news correspondents report that additional information may be obtained by contacting E.H. Ekiz, Technical Univ Darmstadt, Joint Res Lab Nanomat, D-64287 Darmstadt, Germany. Additional authors for this research include T.G. Lach, R.S. Averback, N.A. Mara, I.J. Beyerlein, M. Pouryazdan, H. Hahn and P. Bellon.

Keywords for this news article include: Europe, Germany, Darmstadt, Materials Science

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Source: Journal of Technology

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