|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location Specific, Processing-Microstructure-Property-Relationships III
||Process-microstructure-property-performance Relationships in Electron Beam Additively Manufactured Ti-6Al-4V
||Brian Hayes, Brian Welk, Sam Kuhr, Wenqi Li, Thomas Ales, Iman Ghamarian, Matt Clark, D. Gary Harlow, Hamish L Fraser, Peter Collins
|On-Site Speaker (Planned)
Advanced manufacturing of metallic structures requires a change to qualification strategies. One approach, informed qualification, integrates modeling strategies to make predictions of material characteristics, including the prediction of tensile properties for given chemistries and microstructures. In this work, constitutive equations are developed and presented that can predict the yield strength of additively manufactured Ti-6Al-4V subjected to one of three different heat-treatments: a stress relief anneal in the α+β phase field; a hot isostatic press treatment in the α+β phase field; and a β-anneal. The equations are nominally identical, though different strengthening mechanisms are active according to subtle microstructural differences. To achieve an equation that can predict the yield strength of the material, it is also necessary to include an assessment of dramatic reduction in the tensile strength due to texture (i.e., a “knock-down” effect). The resulting predictions of yield strength are generally within 5% of their experimentally measured values.
||Planned: Supplemental Proceedings volume