About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Frontiers in Solidification: An MPMD Symposium Honoring Jonathan A. Dantzig
|
Presentation Title |
Microstructure Evolution during Solidification of Fe-C-Mn-Si Peritectic Steels |
Author(s) |
Olajide S. Akintayo, Muhammad Nabeel, André B. Phillion |
On-Site Speaker (Planned) |
Olajide S. Akintayo |
Abstract Scope |
Peritectic steels suffer casting defects due to volumetric shrinkage associated with peritectic transformation at the initial stage of solidification. Hence, a fundamental understanding of their solidification microstructure is required to optimize process parameters and composition. Bridgman solidification experiments were performed on Fe-C-Mn-Si peritectic steels to investigate the influence of growth velocity and alloy composition on microstructure evolution. The microstructure shows competitive growth behaviour amongst primary δ-dendrites. An interfacial transition from a planar interface to columnar dendrites was observed under increasing growth velocities of 3, 10, and 60 µm/s. A functional relationship between primary dendrite arm spacing (PDAS) and growth velocity is established. Theoretical models of Hunt-Lu, Kurz-Fisher, and Trivedi for predicting PDAS were utilized and compared with obtained experimental data. Finally, the effects of alloying elements on the dendritic morphologies are discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Solidification, Other, Other |