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Processing routes leading to superplastic behaviour of magnesium alloy ZK60
journal contribution
posted on 2005-11-25, 00:00 authored by Rimma Lapovok, P F Thomson, R Cottam, Y EstrinThere has recently been discussion on processing of magnesium alloys by equal channel angular extrusion (ECAE) to achieve a high elongation-to-failure under superplastic tensile deformation. A two-step processing route was suggested to improve superplastic capabilities of such alloys. In this work, superplastic behaviour of ZK60 processed by ECAE alone was compared with that for the material that was rolled prior to the ECAE processing. It was shown that deformation preceding the ECAE step does not bring any benefit with regard to superplastic behaviour in the low temperature range around 200 °C. An important finding is that ECAE processing by itself leads to a record elongation of 1400 and 2040% at the strain rates of 3 × 10 -3 and 3 × 10 -4 s -1 , respectively.
History
Journal
Materials science and engineering: AVolume
410-411Pagination
390 - 393Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0921-5093Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2005, Elsevier B.V.Usage metrics
Keywords
ZK60 magnesium alloyEqual channel angular extrusion (ECAE)RollingSuperplasticityTension testScience & TechnologyTechnologyNanoscience & NanotechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringScience & Technology - Other TopicsMaterials ScienceMG ALLOYSEXTRUSIONMechanical Engineering
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