|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Multi-material Additive Manufacturing: Processing and Materials Design
||Multi Phase Materials with Architectured Micro Scale Interfaces
||Niyanth Sridharan, David Gandy, Maxim Gussev, Sudarsanam Babu
|On-Site Speaker (Planned)
Multi phase materials with architectured micro scale interfaces offer a unique opportunity to obtain a range of material properties. It has been demonstrated that additive manufacturing techniques can enable site specific control of composition, microstructure and consequently properties. We use the directed energy deposition to fabricate a dual phase functionally graded steel where the interfaces are engineered by altering the chemical composition to trigger a strain induced transformation. The resulting steel showed an increase in the tensile strength and ductility. In situ tensile testing with EBSD coupled with high resolution DIC showed that the increased strength is driven by transformation induced plasticity effect. Characterization showed that the metastable austenite transforms under strain to martensite resulting in the improvements in properties. The work demonstrates that additive manufacturing could be used to fabricate components with complex geometry by engineering the composition to trigger a transformation on loading leading to enhanced mechanical properties.
||Planned: Supplemental Proceedings volume