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Application of multiple residual stress determination methods to coarse-grained biomedical implant castings
Date
2017
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.
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Description
peer-reviewed
Publisher
Taylor & Francis - Routledge
Citation
Materials Science and Technology; 33, (10) pp. 1231-1251
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Funding Information
Irish Research Council (IRC), European Research Council (ERC), Science and Technology Facilities Council, MedCast