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  1. Influence of Mesostructure on Mechanical Property of Laminated Ti–Al Composites

    Shaoyuan Lyu, Yanbo Sun, Lei Ren, Wenlong Xiao and Chaoli Ma

    Version of Record online: 29 MAY 2017 | DOI: 10.1002/adem.201700070

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    Incorporating one ductile layer into the brittle Ti–Al composite is a potential way to overcome low ductility and fracture toughness at room temperature. By controlling the mesostructures of the composite, three types of composites are obtained, among which, laminated Ti/Ti–Al composite exhibits better comprehensive mechanical properties than those of laminated Ti–Al composite and monolithic Ti–Al composite.

  2. Manufacturing and Characterization of Highly Porous Bioactive Glass Composite Scaffolds Using Unidirectional Freeze Casting

    Laura M. Henning, Sara Zavareh, Paul H. Kamm, Miriam Höner, Horst Fischer, John Banhart, Franziska Schmidt and Aleksander Gurlo

    Version of Record online: 29 MAY 2017 | DOI: 10.1002/adem.201700129

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    The combination of gel casting and freeze casting results in better mechanical properties compared to the sole use of the conventional freeze casting technique. Highly porous 45S5 Bioglass/gelatin/chitosan composite scaffolds, which are gel casted before freeze casting, show an increase in the quasielastic moduli by 100% and potentially sufficient pore sizes for applications in bone tissue engineering.

  3. Identifying the Stages during Ultrasonic Processing that Reduce the Grain Size of Aluminum with Added Al3Ti1B Master Alloy

    Gui Wang, Matthew S. Dargusch, Dmitry G. Eskin and David H. StJohn

    Version of Record online: 29 MAY 2017 | DOI: 10.1002/adem.201700264

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    Termination of ultrasonic treatment of Al with Al3Ti1B master alloy addition at a range of temperatures reveals three stages affecting grain refinement. The grain density is increased by five to ten times during stages I and III, which are above and below the liquidus temperature, respectively. The grain size decreased from 278 to 115 microns after 110 s of treatment.

  4. Effects of Phase Content and Evolution on the Mechanical Properties of Mg95Y2.5Zn2.5 and Mg93.1Y2.5Zn2.5Ti1.6Zr0.3 Alloys Containing LPSO and W Phases

    Shouzhong Wu, Zhe Zhang, Jinshan Zhang, Chunxiang Xu, Xiaofeng Niu and Wei Liu

    Version of Record online: 26 MAY 2017 | DOI: 10.1002/adem.201700185

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    The solid-solution treated Mg93.1Y2.5Zn2.5Ti1.6Zr0.3 alloy exhibits good comprehensive mechanical properties after extrusion, which can be attributed to the synergistic effects of these phases, including 18R-LPSO phase, spherical W-MgYZn2 phase, DRX grains, 14H-LPSO clusters, and dynamic precipitates.

  5. Effect of Crucible Material for Ingot Casting on Detrimental Non-Metallic Inclusions and the Resulting Mechanical Properties of 18CrNiMo7-6 Steel

    Sebastian Henschel, Johannes Gleinig, Tim Lippmann, Steffen Dudczig, Christos G. Aneziris, Horst Biermann, Lutz Krüger and Anja Weidner

    Version of Record online: 24 MAY 2017 | DOI: 10.1002/adem.201700199

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    The effect of crucible material on the distribution of non-metallic inclusions in 18CrNiMo7-6 steel (AISI 4317) is studied. The resulting quasi-static strength and ductility, the dynamic fracture toughness, and the fatigue life time are evaluated. The treatment in a carbon-bonded alumina crucible results in lowest ductility due to a relatively high inclusion content. However, the highest fatigue strength is observed for this treatment.

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