Processing and mechanical characteristics of magnesium-hydroxyapatite metal matrix biocomposites Articles uri icon

publication date

  • May 2017

start page

  • 135

end page

  • 143

volume

  • 69

international standard serial number (ISSN)

  • 1751-6161

electronic international standard serial number (EISSN)

  • 1878-0180

abstract

  • Magnesium/hydroxyapatite composites were produced by conventional extrusion and their mechanical behavior studied under uniaxial compression at room temperature. The results evidence the capability of the HA for strengthening the Mg material, lowering its microstructural anisotropy and inhibiting deformation twinning. They also reveal that the ECAP processing is effective for improving the grain structure and reducing the crystallographic texture of these composites, giving rise to a significant enhancement of their yield strength and microhardness although the ultimate compressive stress worsens. The analysis of the strain hardening rate of the flow curves demonstrates that the HA addition and the ECAP processing are also effective in inhibiting non-basal dislocation slip.

keywords

  • biocomposite; magnesium; hydroxyapatite; strain hardening; texture hardening; strain-hardening behavior; grain-size dependence; corrosion behavior; pure magnesium; alloys; deformation; composites; bone