Advanced Engineering Materials

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Recently Published Articles

  1. Precipitation in a Nanograined 7475 Aluminium Alloy—Processing, Properties and Nanoanalysis

    Malgorzata Lewandowska, Kinga Wawer, Pawel Kozikowski, Masato Ohnuma and Krzysztof J. Kurzydlowski

    Article first published online: 17 APR 2014 | DOI: 10.1002/adem.201400018

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    Precipitation strengthening in a nanograined 7475 aluminium alloy obtained by hydrostatic extrusion of water quenched samples is studies. Low temperature ageing causes precipitation processes and strengthening phenomena. However, the particle strengthening is limited by enhanced grain boundary precipitation and smaller size of precipitates.

  2. A New In Situ Microscopy Approach to Study the Degradation and Failure Mechanisms of Time-Dependent Dielectric Breakdown: Set-Up and Opportunities

    Zhongquan Liao, Martin Gall, Kong Boon Yeap, Christoph Sander, Oliver Aubel, Uwe Mühle, Jürgen Gluch, Sven Niese, Yvonne Standke, Rüdiger Rosenkranz, Markus Löffler, Norman Vogel, Armand Beyer, Hans-Jürgen Engelmann, Peter Guttmann, Gerd Schneider and Ehrenfried Zschech

    Article first published online: 17 APR 2014 | DOI: 10.1002/adem.201400088

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    An in situ approach using transmission X-ray microscopy and scanning transmission electron microscopy is developed to study the degradation and failure mechanisms of time dependent dielectric breakdown (TDDB) in copper/ultra-low-k interconnects. The metal migration is detected by the bright field imaging, and the Cu distribution is shown by the electron spectroscopic imaging. This approach contributes the improved understanding of the TDDB.

  3. Spark Plasma Sintering of Alumina Composites with Graphene Platelets and Silicon Carbide Nanoparticles

    Jian Liu, Zheng Li, Haixue Yan and Kyle Jiang

    Article first published online: 16 APR 2014 | DOI: 10.1002/adem.201300536

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    Alumina (Al2O3) ceramic composites with graphene platelets (GPLs) and silicon carbide (SiC) nanoparticles were fabricated using spark plasma sintering furnace. The addition of GPLs and SiC significantly reduce the grain size of the Al2O3 matrix. Compared with pure Al2O3, the composites show approximately a 36% increase in hardness, a 40% increase in flexural strength and a 50% increase in fracture toughness.

  4. Low Temperature Processing of Reaction-Bonded Boron Carbide Composites

    Nachum Frage, Shmuel Hayun, Helen Dilman and Moshe P. Dariel

    Article first published online: 16 APR 2014 | DOI: 10.1002/adem.201400108

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    A novel approach for fabrication of reaction bonded B4C-(Al, Mg) composites at low temperature is described. The key feature of this approach is the uses of Mg-vapor atmosphere during the infiltration process. Low temperature process allows preventingthe formation of the deleterious aluminum carbide (Al4C3).

  5. Characterization and Modeling of Failure Initiation in Bainite-Aided DP Steel

    Ali Ramazani, Yuling Chang and Ulrich Prahl

    Article first published online: 15 APR 2014 | DOI: 10.1002/adem.201300556

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    Martensite cracking is identified as domain mechanism for failure initiation in bainite-aided DP steel. RVE approach combined with XFEM is used to model martensite cracking on mesoscale. XFEM is used to model martensite cracking. XFEM parameters are quantitatively identified and validated by numerical versus experimental tensile test comparison.