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Showing 1 to 6 of 6 for “"ultrafine grain"”.
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Effects of high shear deformation from equal channel angular pressing-conform and post thermal mechanical processing on the microstructural and mechanical properties of titanium alloys
… the microstructure with the goal of producing an ultrafine grain material with enhanced mechanical properties. Three titanium alloys were studied, commercially pure titanium Grade 4, Ti 13Zr, and Ti-6Al-7Nb, allowing for the systematic investigation of the processing response and strengthening …
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Catalytic properties, densification and mechanical properties of nanocrystalline yttria-zirconia-based materials
… and 8YZ) were successfully densified with an ultrafine grain size of < 90 nm by pressureless sintering at 11000C and 11500C, respectively. The low-temperature sinterability could be attributed to the well-defined nanocrystalline particles obtained via hydrothermal synthesis, and the effective …
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Nanocrystalline perovskites for catalytic combustion and oxygen separation
… synthesized with higher surface area and smaller grain size by chemical co-precipitation compared to solid-state and complexation/combustion synthesis routes. The choice of solvent, base and suspension pH in co-precipitation was found to strongly affect the chemical stoichiometry of the resulting …
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Microstructure design of mechanically alloyed materials
… materials' properties tend to degrade due to grain growth when they are exposed to high temperatures; this makes producing bulk, nanocrystalline components particularly difficult as the most promising synthesis methods involve high temperature densification of powders or foils. Several alloy …
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Catalytic combustion of methane with nanostructured barium hexaaluminate-based materials
… structur~ has the potential to suppress grain growth at high temperatures. A novel reverse microemulsion-mediated sol-gel processing technique was developed to synthesize non-agglomerated BHA nanoparticles with high surface areas and thermal stability. The reverse microemulsion also …
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Effect of incremental equal channel angular pressing (I-ECAP) on the microstructural characteristics and mechanical behaviour of commercially pure titanium
… and performance of CP-Ti by nano-structuring or grain refinement.;Severe plastic deformation (SPD) is an established method for introducing extreme grain refinement in metals. The technique imparts high plastic strain to the material without significantly changing the sample dimensions and is …