Fatigue response of NiFeGa single crystals

The tensile fatigue response of single crystal NiFeGa with [001], [011] and [123] orientations was investigated under pseudoelastic conditions. The [001] orientation displayed a remarkably long fatigue life, exceeding 13,000 cycles, when loaded to a 10% strain range. The [123] orientation displayed the shortest fatigue life and the [011] intermediate. Although the fatigue lives drastically varied for all three orientations, the stabilization of the stress-strain curves was similar. The lack of residual strains and the stability of the stress-strain curves indicate excellent fatigue resistance. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.