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

Sheng Cheng; Yonghao Zhao; Yazhou Guo; Ying Li; Qiuming Wei; Xun-Li Wang; Yang Ren; Peter K Liaw; Hahn Choo; Enrique J Lavernia

doi:10.1002/adma.200901991

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

Adv Mater. 2009 Dec 28;21(48):5001-5004. doi: 10.1002/adma.200901991. Epub 2009 Oct 2.

Authors

Sheng Cheng¹, Yonghao Zhao², Yazhou Guo³, Ying Li², Qiuming Wei³, Xun-Li Wang⁴, Yang Ren⁵, Peter K Liaw¹, Hahn Choo¹, Enrique J Lavernia²

Affiliations

¹ Department of Materials Science and Engineering University of Tennessee Knoxville, TN 37996 (USA).
² Department of Chemical Engineering and Materials Science University of California Davis, CA 95616 (USA).
³ Department of Mechanical Engineering University of North Carolina Charlotte, NC 28223 (USA).
⁴ Neutron Scattering Science Division Oak Ridge National Laboratory Oak Ridge, TN 37831 (USA).
⁵ Advanced Photon Source, Argonne National Laboratory Argonne, IL 60439 (USA).

PMID: 25378188
DOI: 10.1002/adma.200901991

Abstract

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. This work highlights potential ingenious avenues to exploit the superior behavior of NC materials under extreme conditions.

Keywords: Alloys; Dynamic loading; Grain coarsening; Nanocrystallites; Plastic deformations.