Processing and Mechanical Properties of Solid Core and Porous Surface Ti-6Al-4V Implants Fabricated by Powder-Metallurgy

Montasser Dewidar; Jae Kyoo Lim

doi:10.4028/www.scientific.net/KEM.345-346.1209

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Effects of the Deformed Volume and the Volume Fraction on the Local Deformation Behavior of W/Cu Composites
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Processing and Mechanical Properties of Solid Core and Porous Surface Ti-6Al-4V Implants Fabricated by Powder-Metallurgy
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Processing and Mechanical Properties of Solid Core and Porous Surface Ti-6Al-4V Implants Fabricated by Powder-Metallurgy

Abstract:

Porous-surfaced with solid core Ti-6Al-4V implant compacts were fabricated by traditional powder metallurgy. Powder metallurgy technique was used to produce three different porous surfaced implant compacts 30, 50, and 70% in vacuum atmosphere. The solid core formed in the center of the compact shows similar microstructure of near full density of Ti-6Al-4V. The compressive yield strength was up to 270 MPa and significantly depended on the surface porosity, core size, and temperature of sintering. Selected porous-surfaced Ti-6Al-4V implant compacts with a solid core have much higher compressive strengths compared to the human teeth and sintered fully porous Ti-6Al-4V joint replacements. The ingrowth of bone tissue into the outer porous surface layer results in part fixation, while the solid inner core region provides the necessary mechanical strength for a device used for the replacement of heavy load bearing joint regions such as the hip and knee. The microstructure of sintered samples was investigated.