Effect of high-pressure torsion on microstructure, mechanical properties and corrosion resistance of cast pure Mg
|Author:||Ahmadkhaniha, Donya1; Huang, Yi2,3; Jaskari, Matias4;|
1Department of Material and Manufacturing, School of Engineering, Jönköping University
2Materials Research Group, Department of Mechanical Engineering, University of Southampton
3Department of Design and Engineering, Faculty of Science and Technology, Bournemouth University
4Kerttu Saalasti Institute, University of Oulu
5School of Metallurgy and Materials, College of Engineering, University of Tehran
6Centre for Advanced Steels Research, University of Oulu
|Online Access:||PDF Full Text (PDF, 2.8 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2018110947767
|Publish Date:|| 2018-11-09
High-pressure torsion (HPT) processing was applied to cast pure magnesium, and the effects of the deformation on the microstructure, hardness, tensile properties and corrosion resistance were evaluated. The microstructures of the processed samples were examined by electron backscatter diffraction, and the mechanical properties were determined by Vickers hardness and tensile testing. The corrosion resistance was studied using electrochemical impedance spectroscopy in a 3.5% NaCl solution. The results show that HPT processing effectively refines the grain size of Mg from millimeters in the cast structure to a few micrometers after processing and also creates a basal texture on the surface. It was found that one or five turns of HPT produced no significant difference in the grain size of the processed Mg and the hardness was a maximum after one turn due to recovery in some grains. Measurements showed that the yield strength of the cast Mg increased by about seven times whereas the corrosion resistance was not significantly affected by the HPT processing.
Journal of materials science
|Pages:||16585 - 16597|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
214 Mechanical engineering
YH and TGL were supported in part by the European Research Council under Grant Agreement No. 267464-SPDMETALS.
© The Author(s) 2018. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.