| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Additive Manufacturing: Microstructure and Material Properties of Titanium-based Materials
|
| Presentation Title |
Understanding Microstructure and Mechanical Property Variations in Lase-based Powder Bed Fusion of Ti-6Al-4V and their Heat Treatment Design |
| Author(s) |
Ebrahim Asadi, Behzad Fotovvati, Seyed Alireza Etesami |
| On-Site Speaker (Planned) |
Ebrahim Asadi |
| Abstract Scope |
This study presents a comprehensive investigation of microstructure and mechanical performance of laser-bases powder bed fusion (LPBF) of Ti-6Al-4V alloy (as-built) and several post-LPBF heat treatment cycles. First, the results of mechanical tensile testing and their associated microstructure, microhardness, porosity, and elemental analysis for LPBF of Ti-6Al-4V sheets are presented. The effect of thickness, orientation, distance from free edges, and height and their correlation to material microstructure (e.g. β nanoparticle volume fraction, martensitic α’ decomposition to α+β and α” orthorhombic structure) and thermal history as dictated by LPBF process parameters are investigate. For the second portion of the presentation, several heat treatments steps and cycles and their influence on mechanical properties and microstructure of Ti-6Al-4V alloys will be presented. These studies are utilized to design a heat treatment cycle to achieve α+α’ microstructure with improved elongation and mechanical strength combination needed for many applications in industries such as biodevice industry. |