Characterization of novel borides in Ti-Nb-Zr-Ta + 2B metal-matrix composites

Soumya Nag; Sonia Samuel; Anantha Puthucode; Rajarshi Banerjee

doi:10.1016/j.matchar.2008.07.011

Characterization of novel borides in Ti-Nb-Zr-Ta + 2B metal-matrix composites

Soumya Nag, Sonia Samuel, Anantha Puthucode, Rajarshi Banerjee

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

Metal-matrix composites consisting of a complex quaternary Ti-35Nb-7Zr-5Ta alloy reinforced by borides have been successfully deposited from a powder feedstock consisting of a blend of elemental titanium, niobium, zirconium, tantalum, and, titanium diboride (TiB₂) powders, using the laser engineered net-shaping (LENS™)¹1LENS™ or Laser Engineered Net Shaping is an additive manufacturing process where a directed laser beam is used to melt and deposit powders of desired composition in a layer-by-layer 3D near-net shape fashion. For more information on this refer to D.M.Keicher and J.E. Smugeresky, JOM, 49(5), 51 (1997). process. The microstructures of the as-deposited composites have been characterized using scanning electron microscopy, orientation microscopy, and, transmission electron microscopy. Both primary and eutectic boride precipitates, exhibiting the orthorhombic B27 structure, are observed in these as-deposited composites. The complex primary borides exhibit an unusual compositional variation within the same precipitate, which has been investigated in detail using site-specific characterization with a transmission electron microscope. The ability to form near-net shape components using the Laser Engineered Net Shaping process makes these laser-deposited composites promising candidates for wear-resistant applications in biomedical implants.

Original language	English
Pages (from-to)	106-113
Number of pages	8
Journal	Materials Characterization
Volume	60
Issue number	2
DOIs	https://doi.org/10.1016/j.matchar.2008.07.011
State	Published - Feb 2009
Externally published	Yes

Funding

This work has been supported in part by a Faculty Research Grant at the University of North Texas.

Keywords

Borides
Laser deposition
Metal-matrix composites
Titanium

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.matchar.2008.07.011

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title = "Characterization of novel borides in Ti-Nb-Zr-Ta + 2B metal-matrix composites",

abstract = "Metal-matrix composites consisting of a complex quaternary Ti-35Nb-7Zr-5Ta alloy reinforced by borides have been successfully deposited from a powder feedstock consisting of a blend of elemental titanium, niobium, zirconium, tantalum, and, titanium diboride (TiB2) powders, using the laser engineered net-shaping (LENS{\texttrademark})11LENS{\texttrademark} or Laser Engineered Net Shaping is an additive manufacturing process where a directed laser beam is used to melt and deposit powders of desired composition in a layer-by-layer 3D near-net shape fashion. For more information on this refer to D.M.Keicher and J.E. Smugeresky, JOM, 49(5), 51 (1997). process. The microstructures of the as-deposited composites have been characterized using scanning electron microscopy, orientation microscopy, and, transmission electron microscopy. Both primary and eutectic boride precipitates, exhibiting the orthorhombic B27 structure, are observed in these as-deposited composites. The complex primary borides exhibit an unusual compositional variation within the same precipitate, which has been investigated in detail using site-specific characterization with a transmission electron microscope. The ability to form near-net shape components using the Laser Engineered Net Shaping process makes these laser-deposited composites promising candidates for wear-resistant applications in biomedical implants.",

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AB - Metal-matrix composites consisting of a complex quaternary Ti-35Nb-7Zr-5Ta alloy reinforced by borides have been successfully deposited from a powder feedstock consisting of a blend of elemental titanium, niobium, zirconium, tantalum, and, titanium diboride (TiB2) powders, using the laser engineered net-shaping (LENS™)11LENS™ or Laser Engineered Net Shaping is an additive manufacturing process where a directed laser beam is used to melt and deposit powders of desired composition in a layer-by-layer 3D near-net shape fashion. For more information on this refer to D.M.Keicher and J.E. Smugeresky, JOM, 49(5), 51 (1997). process. The microstructures of the as-deposited composites have been characterized using scanning electron microscopy, orientation microscopy, and, transmission electron microscopy. Both primary and eutectic boride precipitates, exhibiting the orthorhombic B27 structure, are observed in these as-deposited composites. The complex primary borides exhibit an unusual compositional variation within the same precipitate, which has been investigated in detail using site-specific characterization with a transmission electron microscope. The ability to form near-net shape components using the Laser Engineered Net Shaping process makes these laser-deposited composites promising candidates for wear-resistant applications in biomedical implants.

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Characterization of novel borides in Ti-Nb-Zr-Ta + 2B metal-matrix composites

Abstract

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Keywords

UN SDGs

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