Advanced Engineering Materials
Copyright © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Materials Science Weekly Newsletter
Recently Published Articles
- Quantitative Analyses of MWCNT-Ti Powder Mixtures using Raman Spectroscopy: The Influence of Milling Parameters on Nanostructural Evolution
Khurram S. Munir, M. Qian, Yuncang Li, Daniel T. Oldfield, Peter Kingshott, De Ming Zhu and Cuie Wen
Article first published online: 20 MAY 2015 | DOI: 10.1002/adem.201500142
Harsh ball milling conditions create structural disorders such as non-sp2 defects in the form of open edges and vacancies in the C–C system of MWCNTs. These open edges (existing along the side walls) and vacancies provide the potential sites for the formation of interfacial reaction products of titanium carbides (TiC).
- Ultrafine Grained Structures Resulting from SPD-Induced Phase Transformation in Al–Zn Alloys
Xavier Sauvage, Maxim Yu. Murashkin, Boris B. Straumal, Elena V. Bobruk and Ruslan Z. Valiev
Article first published online: 19 MAY 2015 | DOI: 10.1002/adem.201500151
We have investigated microstructures resulting from the concomitant mechanisms of grain refinement and phase separation in Al–Zn alloys processed by SPD. We show that a higher processing temperature could give rise to a finer structure because of a competition between the classical discontinuous precipitation of Zn and SPD-induced dynamic precipitation.
- Reasons for Volume Contraction after Long-Term Annealing of Waspaloy
Svenja Kinzel, Johannes Gabel, Rainer Völkl and Uwe Glatzel
Article first published online: 19 MAY 2015 | DOI: 10.1002/adem.201500159
The influence of long-term annealing on sample length and microstructure of Ni-base alloy Waspaloy is investigated. Sample contraction during annealing is caused by microstructural changes. Changes in the volume fraction of γ′ phase and matrix are accompanied by compositional differences which influence the lattice parameter. Another contribution to length change is given by carbide transformation.
- Anisotropic Spreading Behavior of PAO Oil on Laser-Patterned Stainless Steel Surfaces
Andreas Rosenkranz, Simon Fleischmann, Carsten Gachot and Frank Mücklich
Article first published online: 18 MAY 2015 | DOI: 10.1002/adem.201500115
We study the spreading behavior of line-like surface patterns produced by laser interference patterning. This study demonstrates that smaller periodicities and larger aspect ratios lead to an enhanced anisotropic spreading behavior due to a larger number of pinning centers.
- Additive Manufacturing and Characterization of René 80 Superalloy Processed Through Scanning Laser Epitaxy for Turbine Engine Hot-Section Component Repair
Ranadip Acharya, Rohan Bansal, Justin J. Gambone, Max A. Kaplan, Gerhard E. Fuchs, Suman Das and N. G. Rudawski
Article first published online: 15 MAY 2015 | DOI: 10.1002/adem.201400589
Scanning laser epitaxy produces thick, crack-free deposits of René 80, a high γ′ “non-weldable” superalloy, atop investment cast substrates of the same alloy in a single pass. Microstructural refinement and increased hardness are observed in the deposit compared to the as-cast substrate.