Unit cell dilation technique for analyzing dilatometry data in microalloyed steels
- School of Advanced Technology, Algonquin College, Ottawa K2G 1V8 (Canada)
- Department of Chemical and Materials Engineering, University of Alberta, T6G 2V4 (Canada)
Highlights: • Lever rule is not an adequate method to analyze dilatometry data. • A method called “Unit Cell Dilation” is developed to analyze the dilatometry data. • The new method calculates phase fractions while accounting for chemical changes during diffusive phase transformation. - Abstract: Dilatometry is the most accurate and common method for measuring the kinetics of phase transformations in solid specimens. Despite the development of a more accurate technique, an inferior method, i.e., the lever rule, is widely used in the scientific community to interpret raw dilatometry data. This paper introduces a sound mathematical approach to modeling the physical phenomena of phase transformations, named continuous sequential phase transformation (CSPT). CSPT is used in creating an algorithm called unit cell dilation (UCD) that is used for analyzing the continuous phase transformation of two microalloyed steels. Results show that the UCD algorithm generates quantitative data for the phase content of the steel that is in good agreement with metallographic observations. The source code for an implementation of the UCD algorithm is distributed under GPL-3.0 license and available for download at (https://github.com/Nassehk/Dilatometry-analysis.git).
- OSTI ID:
- 22804848
- Journal Information:
- Materials Characterization, Journal Name: Materials Characterization Vol. 135; ISSN 1044-5803; ISSN MACHEX
- Country of Publication:
- United States
- Language:
- English
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