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Effect of high-pressure torsion on microstructure, mechanical properties and corrosion resistance of cast pure Mg
Högskolan i Jönköping, Tekniska Högskolan, JTH, Material och tillverkning.
University of Southampton, Southampton, UK.
University of Oulu, Nivala, Finland.
University of Oulu, Nivala, Finland.
Vise andre og tillknytning
2017 (engelsk)Konferansepaper, Oral presentation only (Fagfellevurdert)
Abstract [en]

High-pressure torsion (HPT) processing was applied to cast pure Mg pieces and its effects on microstructure, hardness and tensile properties as well as corrosion resistance were evaluated. The microstructure of the processed samples was examined by electron backscatter diffraction (EBSD) and the mechanical properties were determined by microhardness and tensile tests. Corrosion resistance of the samples was studied via electrochemical impedance spectroscopy (EIS) in 3.5% NaCl solution. The results showed that HPT refined the grain size of Mg very effectively from millimeters in the cast structure to a few micrometers homogeneously through the thickness and created a basal texture on the surface. One or five turns of HPT produced no significant difference in the grain size of the processed Mg but the hardness was a maximum after one turn. The yield strength of the cast Mg was increased by seven times whereas the corrosion resistance was not affected by the HPT processing.

sted, utgiver, år, opplag, sider
2017.
Emneord [en]
Corrosion resistance, Grain size, Hardness, High-pressure torsion, Mg, Tensile strength, Texture
HSV kategori
Identifikatorer
URN: urn:nbn:se:hj:diva-38704OAI: oai:DiVA.org:hj-38704DiVA, id: diva2:1179900
Konferanse
6th International Biennial Conference on Ultrafine Grained and Nano-structured Materials (UFGNSM 2017), 12th-13th November, 2017, Kish Island, Iran
Tilgjengelig fra: 2018-02-02 Laget: 2018-02-02 Sist oppdatert: 2018-09-19bibliografisk kontrollert

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