Temperature dependence of austenite nucleation behavior from lath martensite

Nobuo Nakada, Toshihiro Tsuchiyama, Setsuo Takaki, Naoki Miyano

    Research output: Contribution to journalArticlepeer-review

    76 Citations (Scopus)

    Abstract

    The temperature dependence of austenite nucleation behavior was investigated in an ultralow carbon 13%Cr-6%Ni martensitic stainless steel. The martensitic structure was partially reversed to austenite by heat treatment at different temperature in (austenite-ferrite) two-phase region. With increasing the reversion temperature, the shape of austenite grains tend to be changed from acicular to granular, and their nucleation site is changed from lath boundaries to prior austenite grain boundaries. The transition of nucleation site was discussed in terms of energetics by considering the increases in interfacial energy and elastic strain energy by formation of an austenite nucleus. The calculation results suggested that lath boundary is more preferential nucleation site rather than prior austenite grain boundary because the increment of elastic strain energy is reduced with lowing the reversion temperature.

    Original languageEnglish
    Pages (from-to)299-304
    Number of pages6
    Journalisij international
    Volume51
    Issue number2
    DOIs
    Publication statusPublished - 2011

    All Science Journal Classification (ASJC) codes

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

    Fingerprint

    Dive into the research topics of 'Temperature dependence of austenite nucleation behavior from lath martensite'. Together they form a unique fingerprint.

    Cite this