|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Nano/Micro-mechanics and Length-scale Phenomena
||In situ Investigation on the Multi-Scale Deformation Mechanisms in Additively Manufactured Hierarchical Boron Nitride Nanotube Based Composites
||Tyler Dolmetsch, Tanaji Paul, Cheng Zhang, Benjamin Boesl, Arvind Agarwal
|On-Site Speaker (Planned)
In this study, hierarchical boron nitride nanotube (BNNT) reinforced composites were created using a layer-by-layer additive manufacturing approach that sandwiches aligned BNNT mats, fibers, and foams (high-volume of BNNTs) into BNNT reinforced resins (low-volume of BNNTs). In situ mechanical testing was performed inside a scanning electron microscope to provide real-time visualization of deformation and failure mechanisms such as nanotube pull-out and crack bridging at multiple scale lengths. The unique deformation mechanisms of high-volume fraction BNNT layers are investigated using in situ tension, compression, and indentation techniques. Localized indentation was used to probe the interfacial interactions and strength of these high-volume fraction layers with the surrounding polymer matrix. Cyclic loading and unloading were performed to study the fatigue, creep, and failure mechanisms of the composites under dynamic loading. Finally, in situ high-temperature indentations was conducted to gain a fundamental understanding of the elevated temperature mechanics of these hierarchical composites.
||Additive Manufacturing, Other, Characterization