The effect on the mechanical response of Cr and Ni segregation on dislocation lines in bcc Fe

Research output: Contribution to journalArticle

Authors

Institutes & Expert groups

  • CNEA - National atomic energy commission
  • EDF – R&D - MMC
  • CIEMAT - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas

Documents & links

Abstract

The understanding of irradiation-induced strengthening in ferritic-martensitic high-Cr steels remains an essential issue in the assessment of materials for fusion and next generation fission reactors. Recent advanced experimental studies revealed the importance of solute-rich clusters, containing Cr, Ni, Si, P and Mn, which often are created as a consequence of segregation at dislocation lines. In this work, Metropolis Monte Carlo (MMC) is applied to investigate segregation of Cr and Ni atoms around edge dislocation lines in bcc Fe. The content of Cr is varied between 7% and 10%, with and without 0.25% of Ni. Molecular dynamics has subsequently been applied to the enriched dislocation lines to study the critical resolved shear stress at 300 K and 600 K for different concentrations of solutes in the alloy. It is found that even small amounts of Ni significantly increase the hardening of the material.

Details

Original languageEnglish
Article number152319
Pages (from-to)1-9
Number of pages9
JournalJournal of Nuclear Materials
Volume539
DOIs
Publication statusPublished - Oct 2020

Keywords

  • Iron alloys, Segregation, Dislocation mobility, Monte Carlo

ID: 6839207