File(s) under permanent embargo
Analysis of dynamic segregation and crystallisation in Mg₆₅Cu₂₅Y₁₀ bulk metallic glass using atom probe tomography
journal contribution
posted on 2012-10-30, 00:00 authored by K J Laws, D W Saxey, W R McKenzie, Ross MarceauRoss Marceau, B Gun, S P Ringer, M FerryIn order to develop an in-depth understanding of the flow behaviour and dynamic devitrification processes of metallic glasses in the supercooled liquid region, tensile testing of amorphous Mg 65Cu 25Y 10 samples was carried out at temperatures from 150 to 170°C and at strain rates from 1×10 -3s -1 to 1×10 -2s -1. Tensile data showed a consistent and reproducible inflexion in flow stress at a particular strain that was largely independent of strain rate. This was followed by a dramatic increase in flow stress occuring prior to the determined onset times of static crystallisation. Samples were analysed using atom probe tomography and the results indicate that tensile straining of the initially homogeneous amorphous alloy results in segregation into two distinct glassy phases via a shear-related process, coincident with the maximum shear plane angle, followed by the evolution of regions corresponding to the composition of a number of equilibrium binary and ternary intermetallic phases.
History
Journal
Materials science and engineering AVolume
556Pagination
558 - 566Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0921-5093Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2012, ElsevierUsage metrics
Keywords
atom probe tomographybulk metallic glassthermomechanical processingdevitrificationphase separationcrystallisationScience & TechnologyTechnologyNanoscience & NanotechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringScience & Technology - Other TopicsMaterials ScienceMG-CU-YSUPERCOOLED LIQUIDPHASE-SEPARATIONVISCOUS-FLOWPLASTIC-DEFORMATIONTHERMAL-STABILITYSUPERPLASTIC FLOWFORMING ABILITYSHEAR-FLOWBEHAVIORMechanical Engineering
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC