About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
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| Presentation Title |
Evolution of Special Grain Boundaries During Heat Treatment and Their Impact on Magnetic Properties of Low-Carbon Alloys |
| Author(s) |
Borys Sereda, Irina Kruglyak, Dmytro Sereda, Artem Gunchevskiyy |
| On-Site Speaker (Planned) |
Borys Sereda |
| Abstract Scope |
Investigated the effect of heat treatment in the two-phase region on the evolution of special grain boundaries and the associated changes in the properties of an ultra-low-carbon Armco-iron type alloy. Comprehensive analysis of the microstructure and interface characteristics was performed after annealing at 900 °C with a holding time of 1–3 hours. It was found that the fraction of special grain boundaries increases from 22.7% to 37.17%, indicating a thermodynamically driven restructuring of the boundaries with a decrease in their energy. It was shown that such an evolution of interfaces is accompanied by an increase in magnetic permeability and a decrease in coercive force from 1.60 to 1.24 A/cm. Correlation between the density of low-energy boundaries, grain size (53–81 μm), and magnetic characteristics was revealed. Results obtained demonstrate the decisive role of interfacial thermodynamics and kinetics in the formation of the operational characteristics of polycrystalline materials. |