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The role of back stress caused by precipitates on {101-2} twinning in a Mg-6Zn alloy
journal contribution
posted on 2015-10-28, 00:00 authored by J Jain, Pavel CizekPavel Cizek, W J Poole, Matthew BarnettMatthew BarnettIn the present study, the effect of precipitate characteristics on {101-2} extension twinning have been studied in a Z6 magnesium alloy. A strongly textured Z6 alloy plate was mechanically tested in twinning dominated orientation in solution treated and aged states. Optical microscopy, transmission electron microscopy (TEM) and visco-plastic self consistent (VPSC) modelling are used to examine the effect of precipitate characteristics on twinning. The yield stress was observed to increase by ~80. MPa during ageing and it was estimated that CRSS for twinning increased by ~29. MPa based on VPSC simulations. The increment of twin system strengthening can be attributed to back stress generated by elastically deforming particles.
History
Journal
Materials science and engineering aVolume
647Pagination
66 - 73Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0921-5093Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2015, ElsevierUsage metrics
Keywords
Magnesium alloysPrecipitatesTwinningTEMVPSCBack-stressScience & TechnologyTechnologyNanoscience & NanotechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringScience & Technology - Other TopicsMaterials ScienceSITU NEUTRON-DIFFRACTIONDEFORMATION-BEHAVIORINTERNAL-STRESSESPRISMATIC-SLIPCOPPER-SILICAMGPLASTICITYPARTICLESTWINSMODELMechanical Engineering
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