Balancing strength and ductility in additive-manufactured bulk titanium by interception of titanium hydrides
We report the interception of two titanium hydrides in bulk Ti via additive manufacturing (AM) of hydride-de-hydride (HDH) Ti powders with high H content: nano-sized, stable face-centered cubic (FCC) δ-TiHx plate within α-Ti grains and ultrafine, metastable face-centered tetragonal (FCT) γ-TiH acicu...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2025-03-01
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| Series: | Materials Research Letters |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/21663831.2024.2440041 |
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| Summary: | We report the interception of two titanium hydrides in bulk Ti via additive manufacturing (AM) of hydride-de-hydride (HDH) Ti powders with high H content: nano-sized, stable face-centered cubic (FCC) δ-TiHx plate within α-Ti grains and ultrafine, metastable face-centered tetragonal (FCT) γ-TiH aciculae crossing adjacent α-Ti grain boundaries. Remarkably, the AM bulk Ti achieves a surprising balance of strength and ductility, surpassing those of AM bulk Ti and TC4 alloys. This balance is attributed to effective work hardening from {111} twinning in the FCC δ-TiHx plate, a hindrance to dislocation motion, and high-density dislocation pile-ups around the FCT γ-TiH aciculae dowel connectors. |
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| ISSN: | 2166-3831 |