Advanced Engineering Materials

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Recently Published Articles

  1. TiO2 Macroscopic Fibers with Enhanced Photocatalytic Properties Obtained through a Scale-Up Semi-Industrial Process

    Natacha Kinadjian, Mickaël Le Bechec, Catherine Henrist, Eric Prouzet, Philippe Poulin, Wilfrid Neri, Sylvie Lacombe and Rénal Backov

    Article first published online: 16 OCT 2014 | DOI: 10.1002/adem.201400327

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    Titanium dioxide macroscopic fibers have been generated through a semi-industrial continuous process. This synthetic path allows generating several hundred meters of fibers at once. When empoyed for continuous air purification these fibers showed outstanding photocatalytic properties (degrdation and mineralization) similar to a commercial product (Quartzel®).

  2. Enhanced Plasticity via Kinking in Cubic Metallic Nanolaminates

    Thomas Nizolek, Nathan A. Mara, Irene J. Beyerlein, Jaclyn T. Avallone and Tresa M. Pollock

    Article first published online: 15 OCT 2014 | DOI: 10.1002/adem.201400324

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    Kink band formation is unexpected in cubic nanocrystalline metals but is found to occur during layer-parallel compression of bulk Cu–Nb nanolaminates produced by the accumulative roll bonding process. This deformation mechanism is strongly length scale dependent and allows for large compressive strains (>25%) at high stresses high stresses (>1 GPa) without leading to crack formation.

  3. Grain Growth and β to α Transformation Behavior of a β-Solidifying TiAl Alloy

    Thomas Klein, Salar Niknafs, Rian Dippenaar, Helmut Clemens and Svea Mayer

    Article first published online: 15 OCT 2014 | DOI: 10.1002/adem.201400336

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    Intermetallic γ-TiAl-based alloys are promising materials for light-weight structures in high-temperature application. Their material properties are highly dependent on the microstructural evolution during heat treatments. High-temperature laser-scanning confocal microscopy (HTLSCM) is applied for studying grain growth in the single β phase region and β to α phase transformation allowing for the in situ visualization of the microstructural evolution.

  4. Strain-Induced Phase Transformation of MCrAlY

    Christine Borchers, Thorsten Stoltenhoff, Matthias Hahn, Matthias Schulze, Hamid Assadi, Challapalli Suryanarayana, Frank Gärtner and Thomas Klassen

    Article first published online: 15 OCT 2014 | DOI: 10.1002/adem.201400174

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    Cold spraying results in extensive phase transformation from bcc to fcc structure in an MCrAlY powder (5–22 μm). The coating is dense, see figure, and nanocrystalline. Ball milling of the same powder results in bcc to fcc phase transformation, too, though without evidence of nanocrystallization.

  5. High Temperature Oxidation Behavior of Hypoeutectic Mg–Sr Binary Alloys: The Role of the Two-Phase Microstructure and the Surface Activity of Sr

    Deniz S. Aydin, Zeynel Bayindir and Mihriban O. Pekguleryuz

    Article first published online: 10 OCT 2014 | DOI: 10.1002/adem.201400191

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    The high temperature oxidation resistance of pure Mg is improved with the modification of the oxide scale on the surface via alloying. Sr as a surface active element in Mg changes the oxide structure and forms a compact MgO + SrO composite oxide scale with a SrO rich outermost layer.

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