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Microstructure evolution and mechanical property of powder metallurgy Ti6Al4V alloy with high oxygen concentrations.
- Source :
- Powder Metallurgy; Jul2023, Vol. 66 Issue 3, p236-247, 12p
- Publication Year :
- 2023
-
Abstract
- High oxygen Ti6Al4V alloys are fabricated by vacuum sintering and hot rolling using hydrogenation-dehydrogenation Ti6Al4V powder and ZrO<subscript>2</subscript> powder as raw materials. The complete dissolution of oxygen and zirconium atoms results in an increase in lattice constant and strength. As-rolled Ti64-ZrO<subscript>2</subscript> sample exhibits a bimodal structure with a fine acicular α phase of around 1 μm. Ti64-0.75 ZrO<subscript>2</subscript> alloy with equivalent oxygen content close to 0.6 wt.-% presents a good combination of the high tensile strength (1180.2 MPa) and sufficient elongation (7.3%). Therefore, the critical oxygen content for the ductile-to-brittle transition of powder metallurgy Ti6Al4V alloy can be improved by suitable preparation methods. The formation of a fine β transformation structure may be one of the reasons for maintaining sufficient ductility. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00325899
- Volume :
- 66
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Powder Metallurgy
- Publication Type :
- Academic Journal
- Accession number :
- 164784335
- Full Text :
- https://doi.org/10.1080/00325899.2022.2141095