Microstructural evolution of Ti–Mo binary alloy via thermohydrogen treatment
The microstructural evolution of Ti–Mo alloys via thermohydrogen treatment and the orientation relationships (ORs) between δ-hydride precipitates and the α-phase were investigated. Results indicated that increasing Mo and hydrogen content elevate the β-phase volume fraction while reducing twin densi...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542501539X |
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| Summary: | The microstructural evolution of Ti–Mo alloys via thermohydrogen treatment and the orientation relationships (ORs) between δ-hydride precipitates and the α-phase were investigated. Results indicated that increasing Mo and hydrogen content elevate the β-phase volume fraction while reducing twin density within the α-phase. This promotes a transition from twisted fibrous to straight basket-weave microstructures, and induces overall microstructural refinement following thermohydrogen treatment. Two distinct δ-hydrides types precipitate in association with the β-phase, and their volume fractions decrease with Mo addition due to enhanced solid solubility of hydrogen in the matrix and suppressed hydrogen diffusion. Four orientation relationships between δ-hydrides and α-phase are characterized. The {101‾0} and {101‾3} planes are favorable for OR1 and OR2 δ-hydrides with elongated morphology, accompanying extensive twin formation. The OR3 and OR4 δ-hydrides typically appear fine short lamellae on the {101‾1} and {1‾011} planes. The reason is analyzed in terms of microstructure characterization, lattice strain analysis, and interface mismatch calculations. |
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| ISSN: | 2238-7854 |