Advanced Engineering Materials
Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Materials Science Weekly Newsletter
Recently Published Articles
- Microstructure and Mechanical Properties of Al/Graphene Composite Produced by High-Pressure Torsion
Liyuan Zhao, Huimin Lu and Zhijiang Gao
Article first published online: 26 NOV 2014 | DOI: 10.1002/adem.201400375
Ultrafine-grained Al/graphene composite has been fabricated using high-pressure torsion at room temperature. Graphene platelets act as obstacles pinning dislocations and blocking grain boundaries' movement, leading to grain refinement of the composite. And this composite shows smaller grain size and higher hardness and tensile strength than pure Al and Al/multi-walled carbon nanotubes composite.
- Active Vibration Damping in Structural Aluminum Die Castings via Piezoelectricity – Technology and Characterization
Matthias Schwankl, Simon Kimme, Carina Pohle, Welf-Guntram Drossel and Carolin Körner
Article first published online: 26 NOV 2014 | DOI: 10.1002/adem.201400367
The present work deals with the unique approach of integrating piezoelectric modules into aluminum castings. Applied casting technologies and insert manufacturing details are described. Results from experiments using microphones and LSV indicate a great damping effect at the first natural frequency (978 Hz) of the bell-like casting.
- Micro-Shaping, Polishing, and Damage Repair of Fused Silica Surfaces Using Focused Infrared Laser Beams
Manyalibo J. Matthews, Steven T. Yang, Nan Shen, Selim Elhadj, Rajesh N. Raman, Gabe Guss, Isaac L. Bass, Michael C. Nostrand and Paul J. Wegner
Article first published online: 26 NOV 2014 | DOI: 10.1002/adem.201400349
Localized infrared laser heating can effectively remove surface flaws, which limit performance in high power laser systems. Through direct thermal imaging and finite element modeling, we show how flaw repair can be achieved through thermal annealing or micro-machining methods. The wavelength-dependent optical constants and thermal diffusion time of the material are shown to be crucial in optimizing laser parameters.
- Self-Assembled Recyclable Hierarchical Bucky Aerogels
Mehmet Karakaya, Deepika Saini, Ramakrishna Podila, Malcolm J. Skove, Apparao M. Rao, Ramathasan Thevamaran and Chiara Daraio
Article first published online: 20 NOV 2014 | DOI: 10.1002/adem.201400414
The bucky aerogel (BAG) is a 3D,interconnected, carbon nanotube based material that is capable of efficiently separating oil from water. Our facile and scalable top down approach allows a strong control of the porosity. BAG exhibits superhydrophobicity and oleophilicity, which when combined with its capillary action allows selective adsorption of various organic solvents up to 20 times its weight.
- Low-Density High-Strength Bulk Metallic Glasses and Their Composites: A Review
Jian-Zhong Jiang, Douglas Hofmann, David John Jarvis and Hans-J. Fecht
Article first published online: 19 NOV 2014 | DOI: 10.1002/adem.201400252
This review gives an overview of recent accomplishments in the field of lightweight bulk metallic glasses/composites and their potential engineering and space applications. We mainly focus on four systems, namely, Al-, Mg-, Ca-, and Ti-based metallic glasses. Glass forming ability, mechanical properties, thermal stability, and corrosion resistance of the four metallic glass systems and their composites are presented.