About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
|
Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
Presentation Title |
Designing a Beta Titanium Alloy with High Strength and Low Stiffness via Additive Manufacturing |
Author(s) |
Yi Dan Wang, Sravya Tekumalla, Matteo Seita |
On-Site Speaker (Planned) |
Sravya Tekumalla |
Abstract Scope |
Beta titanium alloys have been identified as the next generation bio-materials that will overcome the challenges associated with stress shielding, which stem from the high stiffness of Ti or Ti-6Al-4V.In this work, we fabricate a novel beta titanium alloy Ti-6.8Fe-1.8Cr-1.2Ni-0.2Mo using laser powder bed fusion (LPBF) by in-situ alloying of pure elemental powders. The resultant alloy is a single phase and consists of near-equiaxed grains with an average size of ~20 µm. We study the mechanical properties of this material by ultrasound, tensile, and microhardness tests. We find that the as-print samples have low, isotropic modulus of elasticity (̴ 60-70 GPa). Furthermore, we measure hardness and strength that are far superior to those of other beta-type Ti alloys and even match typical values found in Ti-6Al-4V. Owing to its low modulus, excellent mechanical properties, and biocompatible constituency, this novel lightweight Ti-6.7Fe-1.7Cr-1.2Ni-0.2Mo alloy is a promising candidate for load-bearing biomedical applications. |