Assessment of blasting induced effects on medical 316 LVM stainless steel by contacting and non-contacting thermoelectric power techniques

SURFACE & COATINGS TECHNOLOGY

卷:206

Article

Carreon, H.¹  Barriuso, S.²  Barrera, G.¹  Gonzalez-Carrasco, J. L.^2,3  Caballero, F. G.² 

[1] Inst Invest Met UMSNH IIM, Morelia, Michoacan, Mexico

[2] Ctr Nacl Invest Met CENIM CSIC, E-28040 Madrid, Spain

[3] Ctr Invest Biomed Red Bioingn Biomat & Nanomed CI, Madrid, Spain

关键词: Grit blasting;    Thermoelectric measurements;    Residual stresses;    Biomaterial;   

DOI  :  10.1016/j.surfcoat.2011.12.026

来源: Elsevier

【 摘 要 】

Grit blasting is a low cost surface modification treatment widely used to enhance mechanical fixation of implants through increasing their roughness. As a result of the severe surface plastic deformation, beneath the surface it produces additional effects such as grain size refinement, work hardening and compressive residual stresses, which are generally evaluated with destructive techniques. In this research work, the blasting induced effects by Al2O3 and ZrO2 particles and their evolution after annealing at 700 degrees C were evaluated in 316LVM (Low Vacuum Melting) stainless steel specimens using two non-destructive thermoelectric techniques (NDTT), the non-contacting and contacting thermoelectric power measurements. Microstructural analysis and microhardness measurements performed beneath the blasted surface reveals that the non-contact NDTT results correlate well with the reversion of the alpha'-martensite developed during blasting, whereas the contact NDTT results are closely related to the grain size refinement and work hardening and the expected evolution of compressive residual stresses. Potential of these techniques to monitor subsurface changes in blasting processes and others severe surface plastic deformation techniques are clearly envisaged. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

Free