Evolution of nanoscale porosity during equal-channel angular pressing of titanium

Lapovok, R., Tomus, D., Mang, J., Estrin, Y. and Lowe, T. C. 2009, Evolution of nanoscale porosity during equal-channel angular pressing of titanium, Acta materialia, vol. 57, no. 10, pp. 2909-2918, doi: 10.1016/j.actamat.2009.02.042.

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Title Evolution of nanoscale porosity during equal-channel angular pressing of titanium
Author(s) Lapovok, R.ORCID iD for Lapovok, R. orcid.org/0000-0002-1395-9814
Tomus, D.
Mang, J.
Estrin, Y.
Lowe, T. C.
Journal name Acta materialia
Volume number 57
Issue number 10
Start page 2909
End page 2918
Total pages 10
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2009-06
ISSN 1359-6454
Keyword(s) nanoscale porosity
equal-channel angular pressing (ECAP)
back pressure
small-angle neutron scattering (SANS)
ultrafine-grained titanium
Summary Small-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.
Language eng
DOI 10.1016/j.actamat.2009.02.042
Field of Research 091207 Metals and Alloy Materials
0912 Materials Engineering
0913 Mechanical Engineering
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2009, Acta Materialia
Persistent URL http://hdl.handle.net/10536/DRO/DU:30075974

Document type: Journal Article
Collections: Institute for Frontier Materials
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