Advanced Engineering Materials
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Materials Science Weekly Newsletter
Recently Published Articles
- Enhanced Strengthening in Ultrafine-Grained Al–Mg–Si Alloys Produced via ECAP with Parallel Channels
Elena Vladimirovna Bobruk, Vil Uzbekovich Kazykhanov, Maxim Yurievich Murashkin and Ruslan Zufarovich Valiev
Article first published online: 7 JUL 2015 | DOI: 10.1002/adem.201500119
This paper discusses fabrication of optimal high strength and ductility combination in aluminum Al–Mg–Si alloys through formation of a UFG structure with ordered distribution of strengthening metastable β′ and β″ precipitates via SPD followed by artificial aging.
- In Situ Investigation of the Oxidation of Cobalt-Base Superalloys in the Environmental Scanning Electron Microscope
Martin Weiser, Angelika Reichmann, Mihaela Albu, Sannakaisa Virtanen and Peter Poelt
Article first published online: 7 JUL 2015 | DOI: 10.1002/adem.201500146
A heating stage mounted in the specimen chamber of an environmental scanning electron microscope (Figure) enables the continuous observation of the development of the corrosive structures during hot corrosion experiments. The temperature, at which the oxidation of the material starts, can be determined, and the dependence of the corrosion process on the crystallographic orientation of individual grains can be observed.
- Microstructural Evolution and Mechanical Properties of the As-Cast and Extruded Mg–Gd Alloys
Nazanin Bayat Tork, Seyyed Hossein Razavi, Hassan Saghafian and Reza Mahmudi
Article first published online: 7 JUL 2015 | DOI: 10.1002/adem.201500189
The yield and ultimate shear strength of Mg–xGd (x = 0, 1, 2) alloys are studied in both as-cast and extruded conditions. In the as-cast materials, the enhancement in shear strength is attributed to the formation of Mg5Gd particles, while in the extruded materials the severe grain refinement achieved after extrusion is responsible for such improvements.
- Synthesis of Nanoporous Gold Tubes
Theresa Juarez and Andrea M. Hodge
Article first published online: 7 JUL 2015 | DOI: 10.1002/adem.201500249
A method for synthesizing nanoporous gold tubes as a hierarchical structure is presented. Samples are fabricated via electrodeposition, homogenization, and dealloying to generate a random porous network in the tube wall. Electrodeposition parameters are optimized by using a reverse pulse current setup. The hierarchy of the tubes is further altered by controlling the ligament size through heat treatments.
- Microstructural Evolution and Mechanical Properties of ZrB2–SiC/Cu/Ti/Ti6Al4V Brazing Joints
Weiqi Yang, Peng He, Lili Xing and Tiesong Lin
Article first published online: 7 JUL 2015 | DOI: 10.1002/adem.201500281
The TiB whiskers with vertical and disordered distribution are in situ synthesized in the joint when joining ZrB2–SiC ceramic to Ti6Al4V by using Cu/Ti interlayers. Proper volume of TiB whiskers and Ti2Cu in the joint can form a smooth transition from ceramic to metal, which is beneficial for the joint strength. The maximum shear strength reaches 90.7 MPa when brazing at 920 °C for 10 min.