Lattice strain and damage evolution of 9-12%Cr ferritic/martensitic steel during in situ tensile test by X-ray diffraction and small angle scattering

Xiao Pan, Xianglin Wu, Kun Mo, Xiang Chen, Jonathan Almer, Jan Ilavsky, Dean R. Haeffner, James F. Stubbins

Research output: Contribution to journalArticlepeer-review

Abstract

In situ X-ray diffraction and small angle scattering measurements during tensile tests were performed on 9-12% Cr ferritic/martensitic steels. The lattice strains in both particle and matrix phases, along two principal directions, were directly measured. The load transfer between particle and matrix was calculated based on matrix/particle elastic mismatch, matrix plasticity and interface decohesion. In addition, the void or damage evolution during the test was measured using small angle X-ray scattering. By combining stress and void evolution during deformation, the critical interfacial strength for void nucleation was determined, and compared with pre-existing void nucleation criteria. These comparisons show that models overestimate the measured critical strength, and require a larger particle size than measured to match the X-ray observations.

Original languageEnglish (US)
Pages (from-to)10-15
Number of pages6
JournalJournal of Nuclear Materials
Volume407
Issue number1
DOIs
StatePublished - Dec 1 2010

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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