Characteristics of the γ→α transformation in Fe-Mn alloys

被引：64
|
作者：
Li, CM [1 ]
Sommer, F [1 ]
Mittemeijer, EJ [1 ]
机构：
[1] Max Planck Inst Met Res, D-70174 Stuttgart, Germany
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2002年 / 325卷 / 1-2期
关键词：
phase transformations; Fe-Mn alloys; thermodynamics; differential thermal analysis (DTA); dilatometry;
D O I：
10.1016/S0921-5093(01)01459-9
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The relationships between the lattice parameters of austenite and ferrite in Fe-Mn alloys and Mn content were established by means of X-ray diffraction and revised literature data. These results were used to calculate the dilatation due to the isothermal gamma-->alpha transformation. The dilatometric experimental results are in very good agreement with the calculations. It was found that the increase of hardness of the alpha phase is a linear function of Mn content and is mainly determined by the lattice strain of this phase. The Curie temperature of the alloy was established as a function of Mn composition. The austenite fraction and enthalpy difference between ferrite and austenite accompanying the gamma-->alpha transformation were also determined as a function of temperature and Mn content by means of isochronal DTA measurements. (C) 2002 Elsevier Science B.V. All rights reserved.
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页码：307 / 319
页数：13
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