Characterization of deformation behavior of individual grains in polycrystalline Cu-Al-Mn superelastic alloy using white X-ray microbeam diffraction

Eui Pyo Kwon, Shigeo Sato, Shun Fujieda, Kozo Shinoda, Ryosuke Kainuma, Kentaro Kajiwara, Masugu Sato, Shigeru Suzuki

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

White X-ray microbeam diffraction was applied to investigate the microscopic deformation behavior of individual grains in a Cu-Al-Mn superelastic alloy. Strain/stresses were measured in situ at different positions in several grains having different orientations during a tensile test. The results indicated inhomogeneous stress distribution, both at the granular and intragranular scale. Strain/stress evolution showed reversible phenomena during the superelastic behavior of the tensile sample, probably because of the reversible martensitic transformation. However, strain recovery of the sample was incomplete due to the residual martensite, which results in the formation of local compressive residual stresses at grain boundary regions.

Original languageEnglish
Pages (from-to)1845-1856
Number of pages12
JournalMetals
Volume5
Issue number4
DOIs
Publication statusPublished - 2015 Oct 9

Keywords

  • Cu-Al-Mn alloys
  • Martensitic transformation
  • Microscopic stresses
  • Superelasticity
  • White X-ray microbeam diffraction

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