Creating bulk nanocrystalline metal.

Fredenburg, D. Anthony (Georgia Institute of Technology, Atlanta, GA) ; Saldana, Christopher J. (Purdue University, West Lafayette, IN) ; Gill, David D. ; Hall, Aaron Christopher ; Roemer, Timothy John (Ktech Corporation, Albuquerque, NM) ; Vogler, Tracy John

关键词: NANOSTRUCTURES;    FABRICATION;    WEAPONS;    COMPACTING;    METALS;    CRYSTALS Materials-Analysis.;    Nanocrystals.;    Mesoscale-materials;    Nanostructure materials.;   

DOI  :  10.2172/943321
RP-ID  :  SAND2008-6547
PID  :  OSTI ID: 943321
Others  :  TRN: US200902%%172

美国|英语

来源: SciTech Connect

【 摘 要 】

Nanocrystalline and nanostructured materials offer unique microstructure-dependent properties that are superior to coarse-grained materials. These materials have been shown to have very high hardness, strength, and wear resistance. However, most current methods of producing nanostructured materials in weapons-relevant materials create powdered metal that must be consolidated into bulk form to be useful. Conventional consolidation methods are not appropriate due to the need to maintain the nanocrystalline structure. This research investigated new ways of creating nanocrystalline material, new methods of consolidating nanocrystalline material, and an analysis of these different methods of creation and consolidation to evaluate their applicability to mesoscale weapons applications where part features are often under 100 {micro}m wide and the material's microstructure must be very small to give homogeneous properties across the feature.