|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advances in Additive Manufacturing of Titanium and Titanium Based Alloys
||Investigating Sources of Porosity in Electron Beam-based Directed Energy Deposition of Titanium Components
||Kyle Snyder, Richard Martukanitz, Scott Stecker
|On-Site Speaker (Planned)
Porosity is a common issue in additive manufacturing of titanium and its alloys, causing detrimental effects on mechanical properties and limiting potential applications for high performance components. The goal of this research was to establish sources and root causes of pore formation in electron beam processing and determine their influence on porosity. Two potential sources were identified, porosity from hydrogen evolution and aluminum vaporization. A factorial experiment was designed to evaluate the effects of hydrogen evolution through filler wire quality and the effects of aluminum vaporization by varying the aluminum content in the filler wire by using Ti-6Al-4V and CP-Ti alloys. Optical microscopy and stereology methods were used to determine the total pore volume for each condition. Statistical approaches were applied to improve the interpretation of the response variable (porosity) in terms of the independent variables. These methods indicated significant effects from main factors and interactions between factors.
||Planned: Supplemental Proceedings volume