Characterization of microscopic stresses in a polycrystalline Fe-Ga alloy with large elastic anisotropy

Yusuke Onuki, Ryuji Ukai, Shigeo Sato, Shun Fujieda, Kozo Shinoda, Kentaro Kajiwara, Masugu Sato, Shigeru Suzuki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Fe-Ga alloys show large magnetostriction, which strongly depends on crystal orientation. This phenomenon is considered to be associated to some degree with large elastic anisotropy in single crystals. In this study, white X-ray diffraction with micro-beam synchrotron radiation was used to evaluate the microscopic stresses evolved in a polycrystalline Fe-Ga alloy under tensile loading. In the analysis, the large elastic anisotropy of the Fe-Ga alloy was focused. The stress distribution in the alloy microstructure under tensile loading was estimated using a finite element method (FEM) simulation that considered the dependence of the elasticity on the crystal orientation. The crystal orientation of grains in the polycrystalline Fe-Ga alloy was measured using electron backscatter diffraction. The FEM simulation showed that the stress distribution in the microstructure depended on the crystal orientation. The X-ray diffraction stress analysis indicated that under tensile loading, the stresses in the alloy depended on the crystal orientation. This finding is similar to the results obtained from the FEM simulation, although the absolute values of the stresses may have reflected the effects of heterogeneous deformation on the stress distribution.

Original languageEnglish
Title of host publicationMechanical Stress Evaluation by Neutrons and Synchrotron Radiation VIII - 8th MECA SENS
EditorsThomas Holden, Tamas Ungar, Thomas Buslaps, Thilo Pirling
PublisherTrans Tech Publications Ltd
Pages3-8
Number of pages6
ISBN (Print)9783038356356
DOIs
Publication statusPublished - 2017
Event8th International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation, MECA SENS 2015 - Grenoble, France
Duration: 2015 Sep 282015 Oct 2

Publication series

NameMaterials Science Forum
Volume905 MSF
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other8th International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation, MECA SENS 2015
CountryFrance
CityGrenoble
Period15/9/2815/10/2

Keywords

  • Elastic anisotropy
  • Iron-gallium alloy
  • Magnetostriction
  • X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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