Cold spray deposition of nanocrystalline aluminum alloys

Nanocrystalline Soft Magnetic Alloys

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Internal Friction Peak in Cold-Worked ”Pure” Aluminum and Aluminum Alloys

Low frequency internal friction measurements have been made on "pure" aluminum and dilute aluminum alloys in heavily cold-worked states. A relaxation peak is observed at about 200 K(for 1Hz) even in specimens of nominally 4N or higher purity. This peak is considered to be the same as those previously reported by several researchers for dilute aluminum alloys of Cu, Mg or Ga. Among various eleme...

Surface Features of Nanocrystalline Alloys

Nanocrystalline alloys are prepared by controlled annealing of metallic glass precursors. The latter are obtained by rapid quenching of a melt on a rotating wheel. This process leads to structural deviation of the produced ribbons’ surfaces. Structural features of as-quenched and thermally annealed 57Fe81Mo8Cu1B10 ribbons were studied employing Conversion Electron Mössbauer Spectrometry (CEMS) ...

Oxidation Resistance of Nanocrystalline Alloys

Design of stable nanocrystalline alloys.

Nanostructured metals are generally unstable; their grains grow rapidly even at low temperatures, rendering them difficult to process and often unsuitable for usage. Alloying has been found to improve stability, but only in a few empirically discovered systems. We have developed a theoretical framework with which stable nanostructured alloys can be designed. A nanostructure stability map based ...