Application of multiple residual stress determination methods to coarse-grained biomedical implant castings

Brian Conroy, Yéli Traoré, Sanjooram Paddea, Joe Kelleher, David Tanner

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Pages (from-to)1231-1251
Number of pages21
JournalMaterials Science and Technology (United Kingdom)
Volume33
Issue number10
DOIs
Publication statusPublished - 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

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