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Kubasek, Jiri
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Publications (6/6 displayed)
- 2024Microstructural, corrosion and mechanical properties of a WE43 alloy: conventional extrusion versus SPDcitations
- 2023Microstructure and properties of an AZ61 alloy after extrusion with a forward-backward oscillating die without preheating of the initial billetcitations
- 2022The Effect of Extrusion Ratio on the Corrosion Resistance of Ultrafine-Grained Mg-4Li-3Al-Zn Alloy Deformed Using Extrusion with a Forward-Backward Oscillating Diecitations
- 2022Corrosion behavior of fine-grained Mg-7.5Li-3Al-1Zn fabricated by extrusion with a forward-backward rotating die (KoBo)citations
- 2021Microstructure and corrosion resistance of a duplex structured Mg–7.5Li–3Al–1Zncitations
- 2015Corrosion Behaviour of Magnesium Lithium Alloys in NaCl Solutioncitations
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article
Microstructural, corrosion and mechanical properties of a WE43 alloy: conventional extrusion versus SPD
Abstract
A hexagonal close-packed-structure WE43 alloy was extruded without any preheating of the initial billet usingextrusion with an oscillating die to improve the corrosion and mechanical properties. The WE43 alloy wasextruded at high ratios of R1 5:1, R2 7:1 and R3 10:1. Electron back-scatter diffraction and transmission electronmicroscopy were used to determine the microstructural properties of the alloys. The influence of the extrusionmethod and the extrusion ratios on the corrosion and mechanical properties were investigated. Electrochemicaltests were performed, and the corrosion damage was inspected. Tensile tests were made using micro specimens.When compared to conventional extrusion, the microstructural changes obtained with the KoBo method at R1 5:1increased the corrosion resistance, which was not only due to the grain refinement, but also due to the intensityof the texture. A decline in the corrosion resistance of the alloys deformed at higher extrusion ratios wasobserved. This was a result of the massive plastic strain imposed by the KoBo die. The room-temperature mechanicalproperties of the KoBo-extruded alloys were improved. However, at higher temperatures the mechanicalproperties decreased due to the solutioning of tiny triple precipitates.