Corrosion behaviours of Ti6Al4V-Mg/Mg-Alloy composites


Esen Z., Ocala E. B. , Akkaya A., Gurcay B., Ozcan C., Ozgumus B. A. , ...More

CORROSION SCIENCE, vol.166, 2020 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 166
  • Publication Date: 2020
  • Doi Number: 10.1016/j.corsci.2020.108470
  • Title of Journal : CORROSION SCIENCE
  • Keywords: Metal matrix composites, Magnesium, Titanium, Interfaces, SEM, Polarization, BODY-FLUID SOLUTION, IN-VIVO CORROSION, WE43 MG ALLOY, MAGNESIUM ALLOYS, BIODEGRADABLE MAGNESIUM, MECHANICAL-PROPERTIES, FLUORIDE SOLUTIONS, POROUS TITANIUM, VITRO, TI

Abstract

The effect of coupling of unalloyed Mg and Mg-alloys (AZ91 and WE43) with Ti6Al4V alloy on corrosion and degradation behaviours of produced composites has been investigated in simulated body fluid (SBF) by hydrogen evolution, and surface and electrochemical characterization techniques. Combining of unalloyed Mg with Ti6Al4V intensified galvanic corrosion and catastrophic failure occurred by initiation of microcracks formed by sudden hydrogen gas evolution. In contrast to other composites, Ti6Al4V-AZ91 composites, containing new TiAl3 interface layer formed during composite production, preserved their mechanical integrities due to lowest corrosion and degradation rate of AZ91 alloy.