|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing and Innovative Powder Processing of Functional and Magnetic Materials
||Controlled Shape-morphing Metallic Components for Deployable Structures
||Gianna Valentino, Ian McCue, Steven Storck, Morgana Trexler
|On-Site Speaker (Planned)
Transformational advances in additive manufacturing combined with the unique functional behavior of shape memory alloys (SMAs) has propelled the field of 4D printing. In this study, we leverage multiple processing pathways with additive manufacturing to design and fabricate SMA components capable of precise, self-guided shape change that could actuate large-scale (up to 25x25x33 cm3) structures under thermal stimuli. The dual benefits of minor alloy dopants and laser processing parameters were identified to be the most effective method to engineer SMA joints and hinges with locally tailored transformation temperatures over a 90 °C range. Custom-designed plywood-style NiTi hinges with self-regulating features enabled tight bend radii and compact packing sizes. These novel SMAs hinges facilitated deployable structures that can expand 3-7x their stowed area. The fundamental understanding and demonstration of tailored and controlled complex shape-morphing kinematics, without specialized and heavy external motors, lays the groundwork for future SMA-enabled deployables in remote environments.