Bainite Transformation During Continuous Cooling: Analysis of Dilatation Data

被引：10
|
作者：
Ranjan, Ravi [1 ]
Singh, Shiv Brat [1 ]
机构：
[1] Indian Inst Technol, Dept Met & Mat Engn, Kharagpur 721302, W Bengal, India
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2018年 / 49A卷 / 01期
关键词：
LOW-TEMPERATURE BAINITE; CARBON SUPERSATURATION; FERRITE; STEELS; TETRAGONALITY; AUSTENITE; IRON;
D O I：
10.1007/s11661-017-4419-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new approach based on iteration is presented to extract the amount and composition of bainitic ferrite and austenite from the dilatation curve. The carbon concentration of bainitic ferrite estimated from the dilatation curve was found to be higher than the solubility of carbon in alpha-ferrite that is in paraequilibrium with gamma-austenite, and it agreed well with the corresponding value estimated from X-ray diffraction (XRD). A slightly better fit between the experimental and calculated dilatation curves was obtained with body-centered-tetragonal than with body-centered-cubic (bcc) bainitic ferrite. These results suggest that the austenite to bainitic ferrite transformation occurs through a displacive mechanism. (C) The Minerals, Metals & Materials Society and ASM International 2017
引用
收藏
页码：88 / 93
页数：6
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