About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Dynamic Behavior of Materials IX
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Presentation Title |
G-10: Dynamic Compressive Response of Hot-pressed Boron Carbide: Understanding the Role of Microstructural Heterogeneities |
Author(s) |
Arezoo Zare, Amartya Bhattacharjee, Qi Rong Yang , Kent Christian, Richard Haber, Lori Graham-Brady, Matt Shaeffer, K.T. Ramesh |
On-Site Speaker (Planned) |
Arezoo Zare |
Abstract Scope |
A combination of high hardness and low density makes boron carbide (B4C) desirable for ballistic applications. However, commercially available B4C ceramics typically contain a high number density of microstructural heterogeneities resulting from processing. Investigations of the dynamic response of B4C have highlighted the role of such microstructural heterogeneities (particularly carbonaceous inclusions) on the initiation/propagation of cracks. Understanding the effects of the size, spacing, and orientation of these inclusions on the dynamic response is thus essential for designing B4C with improved performance. In this study, a modified Kolsky bar setup is used to evaluate the dynamic compressive response of hot-pressed B4C specimens that contain different sizes/concentrations of carbonaceous inclusions, and the results are compared to expectations from existing models. Preferential orientation of the inclusions is also studied by testing the specimens either parallel or perpendicular to the hot-pressing direction. Fragments of the tested specimens are collected to examine their size/shape distributions. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Characterization, Mechanical Properties |