Inheritance of Dislocations and Crystallographic Texture during Martensitic Reversion into Austenite

被引：37
|
作者：
Nakada, Nobuo [1 ,2 ]
Fukagawa, Reiji [3 ]
Tsuchiyama, Toshihiro [1 ,2 ]
Takaki, Setsuo [1 ,2 ]
Ponge, Dirk [4 ]
Raabe, Dierk [4 ]
机构：
[1] Kyushu Univ, Grad Sch Engn, Dept Mat Sci & Engn, Nishi Ku, Fukuoka 8190395, Japan
[2] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, Fukuoka 8190395, Japan
[3] Kyushu Univ, Grad Student Engn, Nishi Ku, Fukuoka 8190395, Japan
[4] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany
来源：
ISIJ INTERNATIONAL | 2013年 / 53卷 / 07期
基金：
日本学术振兴会;
关键词：
austenite; martensitic reversion; reversible martensitic transformations; crystallographic memory effect; STEELS;
D O I：
10.2355/isijinternational.53.1286
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
A novel type of heat treatment to control austenite stability by precipitation and dissolution of carbide was applied to a 18%Ni-0.6%C steel. The new method enables to study the inherent characteristics of austenite formed by martensitic reversion. The material selected for this study is a hypereutectoid steel with a large carbon solubility gap depending on the austenitizing temperature. The precipitated carbide immediately dissolves into the austenite matrix again after martensitic reversion in order to restore the Ms and Mf temperatures to their initial values. The crystallographic orientation of each phase was mapped by means of the electron back scattering diffraction (EBSD) method using a field emission scanning electron microscope. A full fcc-bcc-fcc reversible martensitic transformations cycle was observed. As a result of the specific heat treatment, the austenite that was formed by martensitic reversion remains stable at ambient temperature.
引用
收藏
页码：1286 / 1288
页数：3
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