Kinetics of the Austenite-Ferrite Transformation with and without Applied Stress

被引：2

作者：

Liu, Yongchang ^{[1
]}

Sommer, Ferdinand ^{[2
]}

Mittemeijer, Eric J. ^{[2
,3
]}

机构：

[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China

[2] Max Planck Inst Met Res, D-70569 Stuttgart, Germany

[3] Univ Stuttgart, Inst Mat Sci, D-70174 Stuttgart, Germany

来源：

SOLID-SOLID PHASE TRANSFORMATIONS IN INORGANIC MATERIALS, PTS 1-2 | 2011年 / 172-174卷

基金：

中国国家自然科学基金;

关键词：

kinetics; massive transformation; applied compressive stress; interface migration velocity; deformation energy; FE-NI SYSTEM; DILATOMETRIC MEASUREMENT; PHASE-TRANSFORMATION; PURE IRON; BEHAVIOR; ALLOYS; PLASTICITY; DIFFUSION; INTERFACE; GROWTH;

D O I：

10.4028/www.scientific.net/SSP.172-174.1207

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The formation of ferrite (alpha) from austenite (gamma) and vice versa, upon thermo-mechanical processing of steels, are phase transformations of great technological importance. Often these transformations occur in the presence of externally or internally imposed stress. This paper provides an overview of recent research on the quantitative analysis of the transformation kinetics of the gamma ->alpha and alpha ->gamma transformations subjected to uniaxial compressive stress below the yield stress of gamma and alpha based on the application of the high-resolution differential dilatometry and the modular model of transformation kinetics. The application of uniaxially compressive stresses leads to antagonistic effects on the transformation kinetics: the stress applied upon the gamma ->alpha transformation prompts the transformation, while it obstructs the alpha ->gamma transformation. These results can be quantitatively discussed in terms of chemical driving forces and transformation-induced deformation energies.

引用

页码：1207 / +

页数：2

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