About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
A Biomedical Titanium Alloy Manufactured by Selective Laser Melting (SLM) |
| Author(s) |
Xuan Luo, Chao Yang, Yuanyuan Li |
| On-Site Speaker (Planned) |
Xuan Luo |
| Abstract Scope |
We report a β-type Ti-35Nb-7Zr-5Ta alloy manufactured by selective laser melting under different laser energy density(LED). The microstructure, mechanical behavior, and strengthening mechanisms were investigated. The results show that the main phases consist of β-Ti together with minor α＂by XRD analysis. The strip and zigzag formation of {112}<111>β twins were observed by the transmission electron microscopy at low and high LED, respectively. The SLM-produced sample with high LED exhibits enhanced strength (872MPa, 12%) but relatively low ductility compared with that by low LED(726MPa, 19%). This difference results from combination of fine grains, high density of dislocations and transformation-induced plasticity. An analysis of the strengthening mechanisms quantitatively established shows that a high density of dislocations and nanometer-sized hexagonal ω particles has a prominent contribution to strength. The obtained material exhibits a low
Young's modulus(~64GPa) and high strength, which potentially allows for the development of implants. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |