4.8 Article

High Plasticity and Substantial Deformation in Nanocrystalline NiFe Alloys Under Dynamic Loading

Journal

ADVANCED MATERIALS
Volume 21, Issue 48, Pages 5001-+

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.200901991

Keywords

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Funding

  1. NSF [DMR-0231320, DMR-0421219]
  2. Office of Naval Research [ONR N00014-08-1-0405]
  3. US Department of Energy [DE-AC05-00OR22725, DE-AC02-06CH11357]

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A nanocrystalline (NC) NiFe alloy is presented, in which both highly improved plasticity and strength are achieved by the dynamic-loading-induced deformation mechanisms of de-twinning (that is, reduction of twin density) and significant grain coarsening (see figure). This work highlights potential ingenious avenues to exploit the superior behavior of NC materials under extreme conditions.

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