Deformation mechanisms in ferritic/martensitic steels and the impact on mechanical design

Nasr M. Ghoniem, Giacomo Po, Shahram Sharafat

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Structural steels for nuclear applications have undergone rapid development during the past few decades, thanks to a combination of trial-and-error, mechanism-based optimization, and multiscale modeling approaches. Deformation mechanisms are shown to be intimately related to mechanical design via dominant plastic deformation modes. Because mechanical design rules are mostly based on failure modes associated with plastic strain damage accumulation, we present here the fundamental deformation mechanisms for Ferritic/Martensitic (F/M) steels, and delineate their operational range of temperature and stress. The connection between deformation mechanisms, failure modes, and mechanical design is shown through application of design rules. A specific example is given for the alloy F82H utilized in the design of a Test Blanket Module (TBM) in the International Thermonuclear Experimental Reactor (ITER), where several constitutive equations are developed for design-related mechanical properties.

Original languageEnglish (US)
Pages (from-to)704-712
Number of pages9
JournalJournal of Nuclear Materials
Volume441
Issue number1-3
DOIs
StatePublished - 2013
Externally publishedYes

ASJC Scopus subject areas

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

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