About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Ultrafine-grained and Heterostructured Materials (UFGH XI)
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Presentation Title |
Hierarchical Structures in Ti-6Al-4V by Thermohydrogen Refinement of Microstructure |
Author(s) |
Brady G. Butler, Laura Moody, Daniel Lewis, Ion Powell, Matthew Dunstan, James Paramore |
On-Site Speaker (Planned) |
Brady G. Butler |
Abstract Scope |
Ultrafine grained and hierarchical structures produced by thermomechanical means offer intriguing combinations of strength and ductility in a variety of metals. However, deformation processing is not typically suited to additive manufacturing (AM) and other near-net-shape (NNS) processing techniques. This study examines a novel process for heat treatment of titanium alloys in a hydrogen atmosphere, which leads to an ultrafine grained and inherently hierarchical microstructure without thermomechanical work. This thermohydrogen refinement of microstructure (THRM) process uses hydrogen as a temporary alloying addition to refine microstructure in Ti-6Al-4V components. The mechanisms of microstructural refinement are explored and characterized via orientation imaging microscopy. Mechanical properties are measured with miniaturized mechanical testing. Finally, these unique hierarchical microstructures are compared to conventional AM and wrought processed materials to determine the suitability of THRM as a post processing tool for NNS manufacturing of titanium. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |