Investigation of high-energy ion-irradiated MA957 using synchrotron radiation under in-situ tension

Kun Mo, Di Yun, Yinbin Miao, Xiang Liu, Michael Pellin, Jonathan Almer, Jun Sang Park, James F. Stubbins, Shaofei Zhu, Abdellatif M. Yacout

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, an MA957 oxide dispersion-strengthened (ODS) alloy was irradiated with high-energy ions in the Argonne Tandem Linac Accelerator System. Fe ions at an energy of 84 MeV bombarded MA957 tensile specimens, creating a damage region ~7.5 μm in depth; the peak damage (~40 dpa) was estimated to be at ~7 μmfrom the surface. Following the irradiation, in-situ high-energy X-ray diffraction measurements were performed at the Advanced Photon Source in order to study the dynamic deformation behavior of the specimens after ion irradiation damage. In-situ X-ray measurements taken during tensile testing of the ion-irradiated MA957 revealed a difference in loading behavior between the irradiated and un-irradiated regions of the specimen. At equivalent applied stresses, lower lattice strains were found in the radiation-damaged region than those in the un-irradiated region. This might be associated with a higher level of Type II stresses as a result of radiation hardening. The study has demonstrated the feasibility of combining high-energy ion radiation and high-energy synchrotron X-ray diffraction to study materials' radiation damage in a dynamic manner.

Original languageEnglish (US)
Article number15
JournalMaterials
Volume9
Issue number1
DOIs
StatePublished - 2016

Keywords

  • In situ tensile test
  • Ion irradiation
  • Oxide dispersion-strengthened (ODS)
  • Synchrotron radiation

ASJC Scopus subject areas

  • Materials Science(all)

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