Progresses in Nanostructured Metallic Materials and Composites

Severe plastic deformation techniques can be utilized to accomplish ultrafine-grained (UFG) or nanocrystalline (NC) microstructures in metallic materials with uncommon mechanical properties. At EUROMAT 2017, the field of severe plastic deformation (SPD) was secured by two symposia, C10 “Thermomechanical Processing, Severe Plastic Deformation and Nanostructuring” and B4 “Advanced properties of SPD‐processed metallic materials”, bringing about eight scientific sessions reflecting the proceeded with enthusiasm for degree just as the significance of research and development in this diverse field.

An exceptional area of Advanced Engineering Materials, visitor edited by Andrea Bachmaier, Anton Hohenwarter, Heinz Werner Höppel and Julia Ivanisenko, presents features from these symposia. The current state of research in the field of ultrafine grained metallic material is exhibited in three audit articles and eleven original research papers.

The survey article by Bruder tackles important issue of deformability of SPD‐processed nanomaterials which is urgent for their applications as structural materials. In this setting two commitments about superplastic behavior of ultrafine grained materials incorporated into this section (by Bobruk and Lee) represent the great viewpoints for accomplishing low temperature and high strain rate superplasticity.

Two further articles are identified with the microstructure development systems in austenitic stainless steels amid SPD and consequent strengthening. Specifically, in the paper by Belyakov various aspects of dynamic recrystallization at numerous multidirectional forging are talked about, while the commitment of Krawczynska is given to the impact of the high hydrostatic pressure on the improvement of static recrystallization after high pressure torsion. The audit article by Skrotzki abridges the examination on metallic nanocomposites delivered by accumulated roll bonding (ARB).

A few further commitments give different instances of successful use of ARB and high pressure torsion for composite materials producing utilizing very intriguing materials combinations like Al and Al2O3 ceramic (Ivanov), Al and steel (Kümmel) or Al and Ti (Schunk), and Ni and carbon nanotubes (Bachmaier). In the correspondence by Kwiecien a new technique to create metallic laminated composites dependent on utilization of surface mechanicalattrition treatment and consequent high‐strain rate pressure is presented.

The audit article by Edalati gives a profound knowledge into the new application region of SPD for processing and consolidation of metallic oxide powders, which improves their physical properties, for instance, permits to tune a band gap. What’s more, in the last paper by Kriegel, finishing this section, the examination of thermal stability of the athermal ω phase acquired by extinguishing of Ti– 4 wt% Fe alloy is performed in comparison with that of ω phase shaped at high pressure torsion.

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