1. Role of biomineralization on the degradation of fine grained AZ31 magnesium alloy processed by groove pressing
- Author
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T.S. Sampath Kumar, Uday Chakkingal, B. Ratna Sunil, and Arun Anil Kumar
- Subjects
Biomineralization ,mineral ,Scanning electron microscope ,Corrosion resistance ,wettability ,Wetting ,Biocompatible Materials ,magnesium ,Immersion time ,Ocean habitats ,X-Ray Diffraction ,Materials Testing ,animal ,rat ,Composite material ,Surface feature ,Cells, Cultured ,Energy dispersive x-ray ,Magnesium phosphate ,Minerals ,Cell Death ,Magnesium ,drug effect ,biomaterial ,AZ31 magnesium alloy ,methodology ,particle size ,Microstructure ,Potentiodynamic polarization curves ,Corrosion ,Magnesium alloys ,Mechanics of Materials ,Aluminum sheet ,Scanning electron microscopy ,Materials science ,Fine grained ,X ray diffraction ,Cell Survival ,Simulated body fluid ,Alloy ,chemistry.chemical_element ,Bioengineering ,engineering.material ,Hydroxyapatite ,Magnesium hydroxide ,spectrometry ,Biomaterials ,Corrosion behavior ,alloy ,MTT assays ,Alloys ,Groove pressing ,Animals ,procedures ,skeletal muscle ,Magnesium alloy ,Muscle, Skeletal ,Simulated body fluids ,Initial grain size ,cell culture ,Rat skeletal muscle ,Metallurgy ,Cell adhesion ,Spectrometry, X-Ray Emission ,Fine grains ,Rats ,Annealed samples ,chemistry ,drug effects ,cytology ,Microscopy, Electron, Scanning ,engineering ,Magnesium phosphates ,Grain refinement ,Grain size and shape - Abstract
Groove pressing (GP) has been successfully adopted to achieve fine grain size up to 7 ?m in AZ31 magnesium alloy with an initial grain size of 55 ?m. The effect of microstructural evolution and surface features on wettability, corrosion resistance, bioactivity and cell adhesion were investigated with an emphasis to study the influence of deposited phases when the samples were immersed in simulated body fluid (SBF 5 �). The role of microstructure was also evaluated without any surface treatments or coatings on the material. GPed samples exhibit improved hydrophilicity compared to the annealed sample. After immersion in SBF, specimens were characterized using scanning electron microscopy (SEM), energy dispersive X-ray (EDAX) analysis and X-ray diffraction (XRD) methods. More amount of white precipitates composed of hydroxyapatite and magnesium phosphate along with magnesium hydroxide was observed on the surfaces of groove pressed specimens as compared to the annealed specimens with an increase in immersion time in SBF. Corrosion behavior of the samples estimated using potentiodynamic polarization curves indicate good corrosion resistance for GPed samples before and after immersion in SBF. The MTT assay using rat skeletal muscle (L6) cells revealed that both the processed and unprocessed samples are nontoxic and cell adhesion was promising for GPed sample. � 2013 Elsevier B.V. All Rights Reserved.
- Published
- 2013
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