Temperature dependence of austenite nucleation behavior from lath martensite

Nobuo Nakada, Toshihiro Tsuchiyama, Setsuo Takaki, Naoki Miyano

Research output: Contribution to journalArticlepeer-review

68 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

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