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research-article

A Model For Bainite Formation at Isothermal Heat Treatment Conditions

[+] Author and Article Information
Gaganpreet Sidhu

1280 main st west Hamilton, ON L8S 4L8 Canada sidhug1@mcmaster.ca

Seshasai Srinivasan

1280 main st. west Hamilton, ON L8S 0A3 Canada ssriniv@mcmaster.ca

Sanjeev Bhole

350 Victoria St Toronto, Ontario, ON M5B 2K3 Canada sdbhole@ryerson.ca

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the Journal of Thermal Science and Engineering Applications. Manuscript received September 29, 2018; final manuscript received January 29, 2019; published online xx xx, xxxx. Assoc. Editor: Ziad Saghir.

ASME doi:10.1115/1.4042861 History: Received September 29, 2018; Accepted January 30, 2019

Abstract

An improved model is presented for the formation of bainitic structures during isothermal heat treatment conditions. The model based on displacive mechanism consists of a new expression for the volume fraction of bainite as a function of time, incorporating a temperature and chemical composition based expression for the number density of initial nucleation sites and limiting volume fraction of bainite. The model has been validated with respect to experimental data of high as well as low carbon steels. It has been found that the isothermal transformation kinetics is well predicted for all steels.

Copyright © 2019 by ASME
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