| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
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| Presentation Title |
Compositionally Graded Titanium Alloys: Correlation Between Local Microstructures and Mechanical Properties |
| Author(s) |
Soumya Sobhan Dash, Zhiying Liu, Yu Zou |
| On-Site Speaker (Planned) |
Soumya Sobhan Dash |
| Abstract Scope |
Multi-component structural materials often exhibit poor mechanical properties due to asperities formed at their interfaces, which result from microstructural inconsistencies. To address these challenges, a graded titanium alloy has been produced using laser additive manufacturing of Ti-6Al-4V alloy with Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy. This graded alloy is well-suited for high-temperature load-bearing applications, such as turbine and compressor blisks. The study evaluates the mechanical behavior of the graded material in both as-deposited and heat-treated conditions. The gradual change in the chemical composition across the material interface prevents abrupt mutations, resulting in increased interfacial strength. Both the as-deposited and heat-treated alloys exhibit similar tensile and hardness properties despite their distinct microstructures. The final fracture occurs in the weaker alloy region, away from the gradient interface, indicating a strong metallurgical bonding. The combined effects of grain size, morphology, and volume fraction of the phases enhance the alloy’s resistance to localized plastic deformation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Other |