Austempering Transformation Kinetics of Compacted Graphite Cast Irons Obtained by Mössbauer Spectroscopy

被引：0
|
作者：
J. Desimoni
机构：
[1] Universidad Nacional de La Plata,Departamento de Física, Facultad de Ciencias Exactas
[2] Instituto de Física La Plata,undefined
来源：
Hyperfine Interactions | 2001年 / 134卷
关键词：
Mössbauer spectroscopy; austempering; Johnson–Mehl equation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Mössbauer spectroscopy has been applied systematically to study the processes occurring during the Stage I of the austempering transformation of compacted graphite cast irons at temperatures from 573 to 673 K for two Mn concentrations. The kinetics of transformation (γ→αFe+γhc) was followed determining the dependence of the high-carbon austenite percentage on austempering time for different austempering temperatures and Mn contents. The evolution of the C concentration and the total amount of C incorporated into high-carbon austenite were also monitored. The results are compared with those of other morphologies and discussed in the frame of Johnson-Mehl's and diffusion models.
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页码：93 / 102
页数：9
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