| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
The Validity of Additivity Rule for Pearlite Transformation in Eutectoid Steels |
| Author(s) |
Jeong Min Kim, Kyung Jong Lee |
| On-Site Speaker (Planned) |
Jeong Min Kim |
| Abstract Scope |
The additivity rule has been widely used to predict the phase transformation behavior during continuous cooling (CCT) from the experimental isothermal phase transformation data (TTT). The calculated result of the additivity rule is the temperature (TCCT) which satisfies the summation of Δt/tTTT equals unity under specific continuous cooling rate. The tTTT represents the time required to obtain the fraction X at temperature(TTTT), which is usually fitted by the curve. Since the TTT experiment can be performed only in a limited temperature range, the extrapolated tTTT values between equilibrium and maximum measured temperature significantly affect TCCT. The extrapolated tTTT are discussed in terms of fitting curves originated from the transformation model, and the upper and lower bound concept. In this study, a proper method of the extrapolated tTTT is proposed. The method is applied to pearlite transformation. It is confirmed that additivity rule is quite possible to apply to pearlite transformation. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |