Abstract
The initial microstructure, its local composition and phase morphology determines the final microstructure in ultra fast heat treatment processes (UFHT). In the present study, we designed and performed, via dilatometry, UFHT processes involving heating rates higher than 250°C/s, peak austenitization and helium quenching. This UFHT leads to a carbon gradient within the austenite, as confirmed by thermodynamic and diffusion calculations. With microscopic techniques we shed light on the microstructure evolution of steels with different compositions and initial microstructures. The most commonly achieved microstructure from UFHT in medium-carbon-steels is a mixture of fine bainite and martensite. Partially dissolved cementite, carbides and other microstructural features could be identified as similar to the original, even after UFHT.
Original language | English |
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Title of host publication | PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015 |
Editors | L.-Q. Chen, M. Militzer, G. Botton et al |
Publisher | International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015 |
Pages | 569-570 |
ISBN (Electronic) | 9780692437360 |
Publication status | Published - 2015 |
Event | International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015 - Whistler, Canada Duration: 28 Jun 2015 → 3 Jul 2015 |
Conference
Conference | International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015 |
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Abbreviated title | PTM 2015 |
Country/Territory | Canada |
City | Whistler |
Period | 28/06/15 → 3/07/15 |
Keywords
- Diffusion
- Martensite
- Ultra fast heat treatment