Microstructure and mechanical properties of a newly developed Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V alloy fabricated by laser directed energy deposition
| Autor: | C Wang, J Z Yi, G Yang, J X Wang, J B Wu, Z Zhu, C X Wang |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Materials Research Express, Vol 11, Iss 1, p 016523 (2024) |
| Druh dokumentu: | article |
| ISSN: | 2053-1591 42546249 |
| DOI: | 10.1088/2053-1591/ad20a5 |
| Popis: | With the rapid development of aviation industry, the study of novel titanium (Ti) alloy with superior mechanical properties is of great significance. In this paper, a newly developed Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V alloy was fabricated by laser directed energy deposition (L-DED), which exhibits coarse β columnar grains containing the basket-weave structure knitted with α phases and β phases. After solution and aging heat-treatment, the fine secondary α phase precipitates, which leads to the increase in microhardness. The as-deposited sample exhibits the tensile strength of 1025 MPa and the elongation of 6.0%. With solution temperature increasing, the strength increases but the plasticity first increases and then decreases. The fracture mechanism shows a mixed of ductile and brittle fracture. The average impact toughness of as-deposited sample in building direction is 40.9 J cm ^−2 higher than that (23.4 J cm ^−2 ) in direction perpendicular to building direction. After solution and aging heat-treatment, the impact toughness improves significantly. |
| Databáze: | Directory of Open Access Journals |
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