The effect of austenite grain size on the continuous cooling transformation kinetics of upper and lower bainite in a low-alloy steel has been investigated using a dilatometer. The transition temperature between upper and lower bainite is almost constant (430 °C) irrespective of the grain size. The transformation rate of upper bainite increased with a decrease in grain size. The instantaneous transformation rate of lower bainite at each volume fraction is not related to the austenite grain size.
Bibliographical noteFunding Information:
This research was supported by the National Core Research Center (NCRC) program from MOST and KOSEF (No. R15-2006-022-01002-0) and by Components and Materials Technology Development program from MOCIE.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys