About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing Fatigue and Fracture V: Processing-Structure-Property Investigations and Application to Qualification
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Presentation Title |
Implementing Processing Strategies and Unique Hot Isostatic Pressing Treatments to Control Microstructure, Defect Content, and Mechanical Properties of Electron Beam Melted Ti-6Al-4V |
Author(s) |
Jake T. Benzing, Nikolas Hrabe, Enrico Lucon, Timothy Quinn, Julius Bonini, Magnus Ahlfors |
On-Site Speaker (Planned) |
Jake T. Benzing |
Abstract Scope |
Materials of known, repeatable properties that are resistant to fracture are of prime importance for structural applications, but additively manufactured parts often contain internal voids and heterogeneities at the microstructural level which reduces strength and repeatability. Post-manufacture, hot isostatic pressing (HIP) treatments are commonly employed to seal the internal porosity. In this work, Ti-6Al-4V parts were manufactured with different melt model sizes to produce crystallographic textures that do not match the texture assumed for most Ti-6Al-4V AM parts (<001>β-fiber in the build direction). In addition, the parts were also subjected to three different HIP treatments, which are all effective in sealing internal porosity. HIP treatments were carried out at temperatures above and below the β transus for Ti-6Al-4V. The relationships between these processing and post-processing strategies on defect content, crystallographic texture, prior-β grain morphology, α-lath thickness, tensile properties, J-type fracture toughness, and high-cycle fatigue life will be presented. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Titanium, Characterization |