In-situ TEM observation of the interaction between dislocations and particles of Cu-added ferritic stainless steel under high-temperature straining

Shuhei Kobayashi, Kenji Kaneko, Kazuhiro Yamada, Masao Kikuchi, Norihiro Kanno, Jun Ichi Hamada

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Cu is always present in the matrix when ferritic steels were prepared from ferrous scrap. When the ferritic steels are aged thermally, Cu particles start appearing and dispersing finely and homogeneously, which may result the steels strengthened by dispersion strengthening. In this study, the interactions between Cu particles and dislocations were examined via high-temperature in-situ TEM straining. Cu-added ferritic stainless steel (Fe-18.4%Cr-1.5%Cu) was used in the present study. Specimen was aged at 1 073 K for 360 ks. Microstructure of specimen was analyzed by JEM-3200FSK and high-temperature in-situ TEM straining was conducted using JEM-1300NEF. Progressing dislocations in matrix contacted with the Cu particle at right angle. This result implies that there is an attractive interaction between dislocations and the Cu particle. Furthermore, dislocations pass through the particle after contacting it, so that the interaction with dislocations and particles should be explained by Srolovitz mechanism.

Original languageEnglish
Pages (from-to)1796-1799
Number of pages4
Journalisij international
Volume56
Issue number10
DOIs
Publication statusPublished - 2016

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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