| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Developing Predictive Capabilities
|
| Presentation Title |
Tailoring Hot Isostatic Pressing Treatments to Homogenize Process-dependent Microstructures and Mechanical Properties of Electron Beam Melted Ti-6Al-4V Parts |
| Author(s) |
Jake T. Benzing, Nik Hrabe, Enrico Lucon, Tim Quinn, Julius Bonini, Chad Beamer, 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 porosity and heterogeneities in the grain structure which reduce strength and reliability. Post-manufacture, hot isostatic pressing (HIP) treatments are commonly employed to seal the internal porosity. In this work, Ti-6Al-4V parts were manufactured by electron beam melting powder bed fusion and subjected to a range of HIP treatments that were carried out at temperatures above and below the β transus for Ti-6Al-4V. Super-β transus HIP treatments eliminate microstructural heterogeneities, including unexpected fiber textures. This presentation will attempt to isolate variables of interest and establish relationships between post-processing strategies and the following variables: porosity, crystallographic texture, prior-β grain morphology, α-lath thickness, tensile and small-punch properties, J-type fracture toughness, and high-cycle fatigue life. Future goals include using these relationships to calibrate and validate crystal plasticity-based finite element models. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |