File(s) under permanent embargo
Evolution of nanoscale porosity during equal-channel angular pressing of titanium
journal contribution
posted on 2009-06-01, 00:00 authored by Rimma LapovokRimma Lapovok, D Tomus, J Mang, Y Estrin, T C LoweSmall-angle neutron scattering (SANS) analysis and transmission electron microscopy evidence suggest the occurrence of nanoscale porosity in commercial-purity titanium processed by equal-channel angular pressing (ECAP). SANS data were produced at two different facilities (GKSS, Germany; and Los Alamos, USA) and were analysed using three different methods. The results are consistent and yield a conclusive picture of the distribution of the scattering centres, which are believed to be associated with nanoporosity. Back pressure applied during ECAP tends to reduce the average pore size, which also depends on the processing route used. The results of the study strongly suggest that ECAP leaves a footprint in titanium in the form of a population of polydispersed nanovoids, which may play an important role in subsequent processing of the material.
History
Journal
Acta materialiaVolume
57Issue
10Pagination
2909 - 2918Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
1359-6454Language
engPublication classification
C Journal article; C1.1 Refereed article in a scholarly journalCopyright notice
2009, Acta MaterialiaUsage metrics
Categories
Keywords
nanoscale porosityequal-channel angular pressing (ECAP)back pressuresmall-angle neutron scattering (SANS)ultrafine-grained titaniumScience & TechnologyTechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringMaterials SciencePARTICLE-SIZE DISTRIBUTIONSSEVERE PLASTIC-DEFORMATIONBACK-PRESSURENANOCRYSTALLINECAVITATIONDIFFUSIONMETALSCREEPMechanical EngineeringCondensed Matter Physics
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC