Derryl Poynor Rick Steffe David Cunningham
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Derryl Poynor Rick Steffe David Cunningham Ti-6Al-7Nb Hip Prosthesis (Femoral Hip Stem)
description
Ti-6Al-7Nb Hip Prosthesis (Femoral Hip Stem). Derryl Poynor Rick Steffe David Cunningham. Composition. Impurities Ta : < 0.5% Fe: < 0.25% N2: < 0.05% O2: < 0.2% C: < 0.08% H2: < 0.009%. Chemical Properties. Superior Atmospheric Corrosion Allotropic Highly Reactive Metal Surface - PowerPoint PPT Presentation
Transcript of Derryl Poynor Rick Steffe David Cunningham
Derryl PoynorRick Steffe
David Cunningham
Ti-6Al-7Nb
Hip Prosthesis(Femoral Hip Stem)
Composition Impurities
Ta: < 0.5%Fe: < 0.25%N2: < 0.05%O2: < 0.2%C: < 0.08%H2: < 0.009%
86%
6%
7% 1%
Titanium Aluminum NiobiumImpurities
Superior Atmospheric Corrosion Allotropic Highly Reactive Metal Surface BIOCOMPATIBLE!
Cells accept alloyHigh protein absorptionInert coating
Chemical Properties
http://ars.els-cdn.com/content/image/1-s2.0-S0169409X10000402-gr2.jpg
Stress/Strain Tensile strength is 145ksi Hardness values
Rockwell A – 66.5Rockwell C – 32
High compressive strength is 156-158 ksi Elongation is 9.4 – 13.2% Fracture toughness is 61.9 – 68.3 ksi. in1/2
Fatigue Strength is 72500 psi Yield Strength is 114 – 130 ksi
Physical Properties Ductile Low density Low friction
Isothermal ForgingCut ingotHeat ingot to 900ºC
Fed into a hydraulic press
Heat treatAnnealed700ºC for 1
hourAir cooled
Manufacturing: Forging
Hot-pressing in moldsLoose powder placed into moldHeat and pressure are appliedOccurs in a vacuum
Chemical/Heat TreatProduct is grit blastedPassivation in nitric acidPlaced in an alkaline solutionHeat treated○ In air or vacuum○ At 600ºC
Manufacturing: Hot Press
Laser forming Over 200 tons of semi-finished bars
created Other applications
OrthopedicsDentistrySlinkys Airplane engines (I.E. fan blades)
Other Information
