Application of multiple residual stress determination methods to coarse-grained biomedical implant castings. Issue 10 (3rd July 2017)

• Record Type: Journal Article
• Authors: Conroy, Brian; Traoré, Yéli; Paddea, Sanjooram; Kelleher, Joe; Tanner, David
• Is Part Of: Materials science and technology. Volume 33:Issue 10(2017)
• Page Start: 1231
• Page End: 1251
• Publication Date: 2017-07-03
• Subjects: Neutron diffraction -- X-ray diffraction -- contour method -- centre-hole drilling -- nano-indentation -- residual stress -- shot-peening -- shot-blasting -- CoCrMo -- ASTM F75 -- femoral knee implants -- biomedical implants -- investment casting; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2017.1282035
• Languages: English
• ISSNs: 0267-0836

Abstract

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.