Abstract
ASTM F75 femoral knee implant components distort during manufacture due to residual stress re-distribution or inducement. X-ray diffraction, neutron diffraction, centre-hole drilling and the contour method residual stress determination techniques were applied to as-cast and/or shot-blasted components. The centre-hole drilling and contour methods can only be considered qualitative as a result of uncertainty associated with the elastic anisotropy of gauge volumes. Additionally, neutron diffraction experimentation returned unfeasible results. However, it was qualitatively identified that a shot-blasting shell-removal process has the ability to significantly alter the bulk residual stress state of the implants and induce a stress state which would cause distortion by re-distribution following material removal during manufacturing processes.
Original language | English |
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Pages (from-to) | 1231-1251 |
Number of pages | 21 |
Journal | Materials Science and Technology (United Kingdom) |
Volume | 33 |
Issue number | 10 |
DOIs | |
Publication status | Published - 3 Jul 2017 |
Keywords
- ASTM F75
- biomedical implants
- centre-hole drilling
- CoCrMo
- contour method
- femoral knee implants
- investment casting
- nano-indentation
- Neutron diffraction
- residual stress
- shot-blasting
- shot-peening
- X-ray diffraction