| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Titanium-based Materials: Processing, Microstructure and Material Properties
|
| Presentation Title |
Effects of Thermal Conditions and Post-Processing Heat Treatments on Microstructure-Property Relationships of Ti-6Al-4V Fabricated via Laser Powder Bed Fusion |
| Author(s) |
Nancy Huang, Timothy W. Simpson, Allison M. Beese |
| On-Site Speaker (Planned) |
Nancy Huang |
| Abstract Scope |
Uniaxial Ti-6Al-4V samples with thicknesses ranging from 0.4-2 mm were fabricated using laser powder bed fusion and heat treated to investigate the effect of thermal conditions on microstructure and mechanical properties. All samples were stress-relived (SR) with subsets of samples annealed, subjected to hot isostatic pressing, or subjected to a chemical surface finish to reduce surface roughness. Porosity and surface quality were assessed using X-ray computed tomography and the width of prior-β grains and α-laths were quantified using optical and scanning electron microscopy imaging. Thicker samples had thinner α-laths, which resulted in higher strength, than thinner samples. All heat treatments led to an increase in α-lath width, which resulted in increased elongation, decreased strength, and decreased hardness compared to SR samples. |