Enhancing dynamic property in additive manufactured IN738LC alloy through cell orientation control
Cell structures are common substructures in additive-manufactured (AM) superalloys, yet their influence on high strain-rate dynamic behavior remains unclear. Herein, two IN738LC alloys with different cell orientations were fabricated via AM and assessed for dynamic behavior at strain rates of ∼105/s...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2025-05-01
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| Series: | Materials Research Letters |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/21663831.2025.2472963 |
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| Summary: | Cell structures are common substructures in additive-manufactured (AM) superalloys, yet their influence on high strain-rate dynamic behavior remains unclear. Herein, two IN738LC alloys with different cell orientations were fabricated via AM and assessed for dynamic behavior at strain rates of ∼105/s using flyer-plate impact tests. Results show that preferential cell growth along the building direction (BD) enhances spall strength by 12–13% (4.36∼4.51 GPa) compared to random orientations (3.91∼3.99 GPa). The enhancement arises from cell alignment along the BD. This alignment makes the cell wall, a damage nucleation site, parallel to the impact direction, restricting damage void coalescence and crack propagation. |
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| ISSN: | 2166-3831 |