Improved bio-acceptability of thermomechanically processed ZM21 magnesium alloy. (8th February 2019)

• Record Type: Journal Article
• Authors: Sriraman, N; Kumaran, S
• Is Part Of: Materials research express. Volume 6:Number 5(2019)
• Publication Date: 2019-02-08
• Subjects: magnesium alloy -- rolling -- short annealing -- twin density -- bio-corrosion.; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/ab0323
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: ZM21 alloy has been one of the most suitable candidate materials for implant owing to its bio-compatibility properties. However, the rapid corrosion of ZM21 alloy has been an issue questioning its adaptability in bio-implant applications. In the present study, an effort was taken to address this issue by optimising the thermo-mechanical process on the ZM21 alloy. ZM21 magnesium alloy was subjected to varying temperatures hot rolling (250, 300 and 350 °C) with 75% reduction followed by subsequent short annealing at 200 °C for 10 min In-vitro tests and tensile test were performed to determine the bio-corrosion behaviour and mechanical properties of the thermomechanically processed ZM21 alloys. These results converged to a recommendation that ZM21 rolled at 350 °C and subsequent short annealing at 200 °C exhibits the best bio-corrosion resistance and biocompatibility owing to the effect of its coarser grain structure and lesser twin density than those obtained with other parameters.