Advanced Engineering Materials

Cover image for Vol. 16 Issue 1

January 2014

Volume 16, Issue 1

Pages 1–127

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Communications
    8. Full Papers
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      Front Cover: Advanced Engineering Materials 1∕2014 (page 1)

      Version of Record online: 9 JAN 2014 | DOI: 10.1002/adem.201470001

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      The cover shows a defending spacecraft against orbital debris is a major concern facing NASA. In the article by Douglas C. Hofmann, Lee Hamill and co-workers, bulk metallic glasses and composites are subjected to hypervelocity impacts to assess their suitability for integration into spacecraft shielding architectures. The image on the cover shows the impact of a 3 mm diameter aluminum sphere impacting a 4-layer test sample of metallic glass at approximately 3 km/s to simulate the impact with a particle of space debris.

  2. Back Cover

    1. Top of page
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    3. Back Cover
    4. Masthead
    5. Contents
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      Back Cover: Advanced Engineering Materials 1∕2014 (page 128)

      Version of Record online: 9 JAN 2014 | DOI: 10.1002/adem.201470002

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      The back cover shows refinement of precipitates in the as-cast magnesium alloy by friction stir processing. The precipitates get fragmented during friction stir processing and are homogeneously distributed in the matrix. Further details can be found in the article by Harpreet Singh Arora and co-workers.

  3. Masthead

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      Masthead: Adv. Eng. Mater. 1∕2014 (page 2)

      Version of Record online: 9 JAN 2014 | DOI: 10.1002/adem.201470003

  4. Contents

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Communications
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      Contents: Adv. Eng. Mater. 1∕2014 (pages 3–7)

      Version of Record online: 9 JAN 2014 | DOI: 10.1002/adem.201470004

  5. Editorial

    1. Top of page
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      Editorial (page 8)

      Tim Adams

      Version of Record online: 9 JAN 2014 | DOI: 10.1002/adem.201300557

  6. Communications

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    3. Back Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Communications
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    1. Behavior of CFRC/Al Foam Composite Sandwich Beams under Three-Point Bending (pages 9–14)

      Martin Vcelka, Michelle Dunn, Yvonne Durandet, Christopher C. Berndt and Dong Ruan

      Version of Record online: 24 JUL 2013 | DOI: 10.1002/adem.201300055

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      The collapse mode and energy absorption of composite sandwich beams with and without defects are studied experimentally. Delamination between carbon fibre epoxy face sheets and an aluminium foam core is introduced by using a release film and measured using ultrasound before three-point bending tests. The force and displacement are recorded from which energy absorption of the sandwich beams is calculated.

    2. Microstructural Analysis of Electrochemical Coated Open-Cell Metal Foams by EBSD and Nanoindentation (pages 15–20)

      Anne Jung, Stefan Diebels, Anjela Koblischka-Veneva, Jörg Schmauch, Afrooz Barnoush and Michael R. Koblischka

      Version of Record online: 3 SEP 2013 | DOI: 10.1002/adem.201300187

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      Metal foams are a very interesting class of lightweight materials. Coating of open-cell metal foams via electrodeposition improves significantly the mechanical properties. In this connection, electrodeposition on metal foams leads to a totally different microstructure than normal electrodeposition on planar electrodes. The curvature of the struts induces an isotropic grain orientation which is responsible for isotropic material behavior.

    3. Study of the High-Efficiency Superplastic Deformation of Ti–6Al–2.5Mo–1.5Cr–0.5Fe–0.3Si Alloy Based on the Strain Rate Sensitivity Index m (pages 21–25)

      GaoChao Wang, MingWang Fu, Juan Li, QianJiang Sun, HongBo Dong and XueFeng Xu

      Version of Record online: 12 SEP 2013 | DOI: 10.1002/adem.201300009

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      A new high-efficiency superplastic deformation approach based on the strain rate sensitivity exponent m (m-HESPD) is developed and realized using Ti–6Al–2.5Mo–1.5Cr–0.5Fe–0.3Si. Compared with the maximum m SPD (MaxmSPD), MaxmSPD has the best elongation of 2000%, while m-HESPD is 1696% using the same Ti-alloy and deformation condition. The deformation efficiency of m-HESPD, however, is significantly increased by 13 times.

    4. Formation of Structure and Properties of Low-Carbon Steel Under Rolling with Shear and Cold Drawing (pages 26–32)

      E. Pashinska, V. Varyukhin, M. Myshlaev and A. Zavdoveev

      Version of Record online: 14 AUG 2013 | DOI: 10.1002/adem.201300197

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      The new method of hot severe plastic deformation is introduced. By rolling with shear, the structure of ultrafine, homogeneous, isotropic, and uniaxial grains formed. The dominating high-angle boundaries are observed. We show that application of rolling with shear by successively using cold drawing enabled us to obtain a wire with a small cross-section without intermediate annealing due to a high plasticity resource.

    5. 2D Quantitative Analysis of Metal Foaming Kinetics by Hot-Stage Microscopy (pages 33–39)

      Isabel Duarte and José M.F. Ferreira

      Version of Record online: 19 AUG 2013 | DOI: 10.1002/adem.201300171

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      Hot-stage microscopy commonly used in materials science, coupled with image analysis software (ImageJ) is proposed for the first time as an alternative and simple approach for visualizing the metal foam evolution and the thermal events occurring onto the external surface skin, as well as to obtain the expansion curve of foamable precursor material prepared by powder metallurgical method.

    6. Shape Memory and Superelasticity in Amorphous/Nanocrystalline Cu-15.0 Atomic Percent (at.%) Sn Wires (pages 40–44)

      Yang-Yong Zhao, Hui Li, Yong-Sheng Wang, Yong Zhang and Peter K. Liaw

      Version of Record online: 3 SEP 2013 | DOI: 10.1002/adem.201300167

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      The Cu-15.0 at.% Sn microwires with different diameter are prepared by rapid solidification from the melt using the method of glass-coated melt spinning. The amorphous/nanocrystalline structure is observed by transmission electron microscopy (TEM) and the high-resolution transmission-electron-microscopy (HRTEM). The wires with this kind of structure show perfect shape memory and superelastic effect, while it is usually brittle in a bulk polycrystalline form.

    7. Microstructure Characterization and Wear Test of Plasma Sprayed and Sintered CP-Ti Coatings (pages 45–51)

      Suzan Bsat and Xiao Huang

      Version of Record online: 4 SEP 2013 | DOI: 10.1002/adem.201300019

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      In this paper a new method for the fabrication of porous commercially pure titanium coatings with sacrificial polymer beads is presented. Two coating processes are employed, plasma spraying and vacuum furnace sintering. Microstructure and properties of plasma sprayed and sintered coatings are examined. Results demonstrate that spherical pores are produced in sintered coatings (shown in figure) and flat circular pores are produced in plasma sprayed coatings.

    8. Microstructural Studies of Fluorine-Implanted Titanium Aluminides for Enhanced Environmental Durability (pages 52–59)

      Rossen A. Yankov, Andreas Kolitsch, Johannes von Borany, Frans Munnik, Sibylle Gemming, Alexander Alexewicz, Hartmut Bracht, Harald Rösner, Alexander Donchev and Michael Schütze

      Version of Record online: 9 SEP 2013 | DOI: 10.1002/adem.201300071

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      Analysis data detailing the microstructure of fluorine-implanted γ-TiAl alloys are presented. Correlations are done among the shape of the F implant profiles, the F dose, and the quality of the resulting oxide scale after high-temperature exposure to air. It is shown that good oxidation protection is associated with Gaussian-type as-implanted F profiles coupled with optimal F doses over a narrow window of about 5.0–9.0 × 1017 cm−2.

    9. Evidence of High-Temperature Strain Heterogeneities in a Nickel-Based Single-Crystal Superalloy (pages 60–64)

      Damien Texier, Daniel Monceau, Ronan Mainguy and Eric Andrieu

      Version of Record online: 9 SEP 2013 | DOI: 10.1002/adem.201300016

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      The creep behavior of a single crystal superalloy is investigated at the dendritic scale. The chemical segregation in the dendritic structure is correlated to strain heterogeneities after creep experiments on ultrathin specimens. It is shown that primary dendrite axes have a strengthening effect.

    10. Thermal Shock Resistance of a Two-Dimensional Silicon Carbon Fiber Reinforced SiC Matrix Composite (pages 65–71)

      Chengyu Zhang, Yuntao Wang, Yongsheng Liu, Shengru Qiao and Jun Zhang

      Version of Record online: 23 SEP 2013 | DOI: 10.1002/adem.201300214

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      The 2D-SiC/SiC composite has higher ability to resist the thermal shock in 0° direction with higher fiber volume fraction, compared with 90° specimen. The greater degradation in the mechanical properties for the 90° specimen suggests more serious damage in the 90° fiber bundles. The damage caused by the thermal shock involves matrix cracking, debonding, and oxidization of fiber/matrix interface.

    11. Vickers Indentation Induced One-Way and Two-Way Shape Memory Effect in Austenitic NiTi (pages 72–79)

      Enwei Qin, Nicolas J. Peter, Mareike Frensemeier, Carl P. Frick, Eduard Arzt and Andreas S. Schneider

      Version of Record online: 18 DEC 2013 | DOI: 10.1002/adem.201300219

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      The microstructural mechanisms which dictate the two-way shape-memory effect in indentation-induced NiTi surfaces is currently unknown. We create surfaces capable of thermally induced switchable topography, and characterize their behavior via white-light interferometry, X-ray and electron back scatter diffraction, and transmission electron microscopy. Results show that the switchable topography is heavily influenced by the initial microstructure, and may be inherently controlled by thermally stabilized martensite directly beneath the residual indent.

    12. Evolution of Recovery Stress and Recovery Strain in Annealed NiTi Thin Wire during Constrained Thermal Cycling to High Temperature (pages 80–84)

      Xiaojun Yan and Jan Van Humbeeck

      Version of Record online: 8 OCT 2013 | DOI: 10.1002/adem.201300180

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      The evolution of recovery stress and recovery strain in an annealed NiTi thin wire during constrained thermal cycling to a temperature above its austenite finish temperature has been investigated. The results show that the recovery stress and recovery strain decrease significantly after the first cycle and reduce gradually further with increasing number of thermal cycles.

  7. Full Papers

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Masthead
    5. Contents
    6. Editorial
    7. Communications
    8. Full Papers
    1. Hypervelocity Impact Phenomenon in Bulk Metallic Glasses and Composites** (pages 85–93)

      Lee Hamill, Scott Roberts, Marc Davidson, William L. Johnson, Steven Nutt and Douglas C. Hofmann

      Version of Record online: 24 SEP 2013 | DOI: 10.1002/adem.201300252

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      The ballistic limit for bulk metallic glass and their composites is investigated. Hypervelocity impacts and observations of spalling behavior are used to develop approximate ballistic limit equations, and the composites are shown to have excellent combinations of hardness and toughness for use as shields.

    2. Microstructure-Property Relationship for Friction Stir Processed Magnesium Alloy (pages 94–102)

      Harpreet Singh Arora, Harpreet Singh Grewal, Harpreet Singh, Brij Kumar Dhindaw, David McPhail, Barbara Shollock, Richard Chater and Sundeep Mukherjee

      Version of Record online: 3 SEP 2013 | DOI: 10.1002/adem.201300205

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      Friction stir processing (FSP) of Mg based AE42 alloy is investigated. EBSD analysis revealed that the grain size got more refined with increasing depth across the specimen cross-section. Hardness and Young's modulus is also found to increase along the depth of the friction stir processed specimen. The friction stir processed specimen show higher tendency towards strain hardening compared to as-cast alloy which is attributed to the fine in situ precipitates.

    3. Effect of Heat Treatment and of Primary Austenite Grain Size on the Minimum Size of Detectable Defect on 26NiCrMoV11.5 High Strength Steel (pages 103–111)

      Silvia Barella, Andrea Gruttadauria, Carlo Mapelli, Davide Mombelli, Claudia Lisiane Fanezi, Fabio Fioletti, Michele Formentelli and Margherita Guarneri

      Version of Record online: 23 AUG 2013 | DOI: 10.1002/adem.201300137

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      Ultra-sonic test values are significantly affected by the microstructural features. Prior austenite grain (PAG) cover a fundamental role in UT sensitivity. PAG drives the martensite block misorientations, grain size, and crystal lattice orientation, main responsible of ultrasound wave attenuation. Interesting correlation between UT and PAG are discovered and discussed, aiming to define a practical rule could be attended in industrial practice.

    4. Study of the Influence of Silicon Phase Morphology on the Microstructural Stress Distribution in Al–Si Alloys Using Object Oriented Finite Element Modeling (pages 112–121)

      Nadimpalli Raghukiran, Aslam Kunhi Mohamed and Ravi Kumar

      Version of Record online: 4 SEP 2013 | DOI: 10.1002/adem.201300096

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      Near-eutectic Al–Si alloy is processed through casting and spray forming. Microstructure of as-cast alloy shows acicular needle-like morphology of silicon particles while spray formed alloy shows uniform distribution of fine and equiaxed silicon particles. Microstructure-based finite element analysis shows strong orientation dependence of Si on the stress distribution in as-cast alloys in contrast to as-sprayed alloys.

    5. Extension of the Martensite Transformation Temperature Relation to Larger Alloying Elements and Contents (pages 122–127)

      David Barbier

      Version of Record online: 4 OCT 2013 | DOI: 10.1002/adem.201300116

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      This work presents a new relation to predict the martensite start (Ms) temperature in steels. The composition ranges covered by the new model are enlarged compared to the classical relations, and includes new alloying elements such as V, Ti or Nb. This new relation is obtained from a data base of almost 1000 different compositions. The predictive ability of the Ms temperature is improved compared to the classical relation.

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