| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Thermal and Mechanical Characterization of the Non-isothermal Tempering of an Experimental Medium-carbon Steel |
| Author(s) |
Perla Guadalupe Díaz-Villaseñor, Octavio Vázquez-Gómez, Héctor Javier Vergara-Hernández, Alexis Iván Gallegos-Pérez, Edgar López-Martínez, Bernardo Campillo |
| On-Site Speaker (Planned) |
Perla Guadalupe Díaz-Villaseñor |
| Abstract Scope |
A medium–carbon steel alloyed with vanadium was analyzed by differential dilatometry and nanoindentation tests to characterize the fourth tempering stage or secondary hardening zone. From isochronal heating paths at different continuous tempering temperatures, the hardening zone preceding the martensite decomposition initiation temperature was delimited. A progressive increase in microhardness was observed proportional to continuous tempering temperature increase respect to start temperature of fourth tempering stage at the lowest heating rate. This increase was related to secondary hardening zone by alloy carbides precipitation. Likewise, isothermal tempering was carried out at the start of the fourth tempering stage to verify secondary hardening. After the thermal cycles, nanoindentation tests were performed to determine the nanohardness and prove the precipitates presence by scanning probe microscopy. A decrease in the nanohardness of the steel was observed, as well as different size and distribution precipitates depending on the heating rate. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Iron and Steel, |