| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Additive Manufacturing and Alloy Design: Bridging Fundamental Physical Metallurgy, Advanced Characterization Techniques, and Integrated Computational Materials Engineering for Advanced Materials
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| Presentation Title |
Microstructure, Mechanical Properties and Thermal Expansion Behavior of Laser Powder Bed Fusion fabricated IN718-YSZ Compositionally Graded Composite |
| Author(s) |
Amey Parnaik, V. Chakkravarthy, Jitendar Kumar Tiwary, Yaojie Wen, Baicheng Zhang, Lakshmi Narayan Ramasubramanian |
| On-Site Speaker (Planned) |
Amey Parnaik |
| Abstract Scope |
This study investigates the microstructure, tensile properties, and thermal expansion characteristics of a laser powder bed fusion (LPBF) manufactured compositionally graded composite comprising Inconel 718 reinforced with 0.5-8 wt.% yttria-stabilized zirconia (YSZ). Across the composition gradient, perpendicular to the build direction, YSZ segregates at melt-pool boundaries, while Inconel 718 forms randomly oriented equiaxed grains. Sections with more than 1.5 wt.% YSZ exhibit significant porosity and solidification cracks, reducing strength and ductility. For the section with 1.5 wt.% YSZ, the yield strength, ultimate tensile strength, and ductility are 819 MPa ± 30, 1008 MPa ± 40, and 7.4 ± 0.4 respectively, comparable to YSZ-free Inconel 718. Dilatometry on 0.5-1.5 wt.% YSZ sections from 25-1200°C reveals a coefficient of thermal expansion (CTE) between that of Inconel 718 and YSZ. The study details the variations in CTE with temperature, linked to microstructural evolution in the composite. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Composites |