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 language | English |
|---|---|
| Pages (from-to) | 299-304 |
| Number of pages | 6 |
| Journal | isij international |
| Volume | 51 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jul 11 2011 |
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All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
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Temperature dependence of austenite nucleation behavior from lath martensite. / Nakada, Nobuo; Tsuchiyama, Toshihiro; Takaki, Setsuo; Miyano, Naoki.
In: isij international, Vol. 51, No. 2, 11.07.2011, p. 299-304.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Temperature dependence of austenite nucleation behavior from lath martensite
AU - Nakada, Nobuo
AU - Tsuchiyama, Toshihiro
AU - Takaki, Setsuo
AU - Miyano, Naoki
PY - 2011/7/11
Y1 - 2011/7/11
N2 - 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.
AB - 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.
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U2 - 10.2355/isijinternational.51.299
DO - 10.2355/isijinternational.51.299
M3 - Article
AN - SCOPUS:79960013576
VL - 51
SP - 299
EP - 304
JO - ISIJ International
JF - ISIJ International
SN - 0915-1559
IS - 2
ER -