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 journalArticlepeer-review

    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

    Fingerprint

    Dive into the research topics of 'In-situ TEM observation of the interaction between dislocations and particles of Cu-added ferritic stainless steel under high-temperature straining'. Together they form a unique fingerprint.

    Cite this