|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Beyond the Beam III
||Hydrogen Heat Treatment of Additively Manufactured Ti-6Al-4V for Improved Mechanical Properties
||Matthew Dunstan, James Paramore, Brady Butler, Matt Vaughn
|On-Site Speaker (Planned)
Titanium and titanium alloys are well known for their attractive physical properties, such as high specific strength and corrosion resistance. However, they are also well known for their high cost and difficult shaping/machining processes. These disadvantages have made Ti alloys a perfect material system for additive manufacturing due to its near-net-shape capability. Unfortunately, melt based AM processes typically require expensive post-processing (e.g. hot isostatic processing) to improve the microstructure for ideal mechanical properties. A new heat treatment known as Thermo-Hydrogen Refinement of Microstructure (THRM) is presented here in which hydrogen is used as a temporary alloying element to reset and refine the microstructure of AM Ti-6Al-4V to produce wrought-like microstructures and mechanical properties not possible via traditional inert/vacuum heat treatments.
||Additive Manufacturing, Titanium, Phase Transformations