Hardness based model for determining the kinetics of precipitation

被引：6
|
作者：
Mittra, Joy [1 ]
Kulkarni, U. D. [1 ]
Dey, G. K. [1 ]
机构：
[1] Bhabha Atom Res Ctr, Div Mat Sci, Bombay 400085, Maharashtra, India
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 500卷 / 1-2期
关键词：
Precipitation; Hardness; Kinetics; Martensitic steel; MO STAINLESS-STEEL; HEAT-TREATMENT; EVOLUTION;
D O I：
10.1016/j.msea.2008.09.056
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A theoretical model based on Johnson-Mehl-Avrami (JMA) formalism for determining kinetics and activation energy of a precipitation process is derived from the variation in hardness properties. Effectiveness of the model for determining the kinetics of beta-NiAl precipitation in PH13-8Mo steel and for distinguishing the kinetics between two temperatures is also demonstrated. The activation energy for beta-precipitation, 244.3 kJ/mol, determined over 809 K to 868 K is in good agreement with that of diffusion of Ni and Al in alpha-iron. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：244 / 247
页数：4
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