| Effect of high pressure torsion on microstructure, mechanical properties and corrosion resistance of pure as-cast Mg |
| Paper ID : 1694-UFGNSM |
| Authors: |
|
Donya Ahmadkhaniha * Department of Material and Manufacturing, School of Engineering, Jönköping University, P.O. Box 1026, Gjuterigatan 5, SE-551 11, Jönköping, Sweden |
| Abstract: |
| High pressure torsion (HPT) processing was applied on as cast pure magnesium (Mg) and then its effect on microstructure and mechanical properties as well as corrosion resistance of as-cast Mg was evaluated. In this order, microstructure of processed samples was investigated by means of electron back scattered spectroscopy (EBSD) and nano-indentation. Mini-tensile test was used to investigate the mechanical properties of the processed Mg. Corrosion resistance of the samples was studied via electrochemical impedance spectroscopy (EIS) in phosphate buffered solution (PBS). Results showed that HPT reduced the grain size of as-cast Mg to about 0.001 and dominated the basal texture on the surface of the samples. There was not a significant difference in the properties of processed Mg by one or five turns of HPT, however, higher turns resulted in relatively more homogeneous microstructure. HPT increased the yield strength and microhardness values of as cast Mg up to 180 MPa and ?, respectively, while, corrosion resistance of pure Mg was not affected by HPT process. |
| Keywords: |
| HPT; Mg; Corrosion; Texture, EBSD; Tensile strength |
| Status : Paper Accepted |
