Openly accessible

Use of residual hydrogen to produce CP-Ti powder compacts for low temperature rolling

Lapovok, Rimma, Tomus, Dacian, Barnett, Matthew Robert and Gibson, Mark A. 2009, Use of residual hydrogen to produce CP-Ti powder compacts for low temperature rolling, International journal of materials research, vol. 100, no. 12, pp. 1727-1738.

Attached Files
Name Description MIMEType Size Downloads
barnett-useofresidualhydrogen-2009.pdf Published version application/pdf 4.66MB 18

Title Use of residual hydrogen to produce CP-Ti powder compacts for low temperature rolling
Author(s) Lapovok, Rimma
Tomus, Dacian
Barnett, Matthew Robert
Gibson, Mark A.
Journal name International journal of materials research
Volume number 100
Issue number 12
Start page 1727
End page 1738
Publisher Carl Hanser Verlag GmbH
Place of publication Munich, Germany
Publication date 2009
ISSN 1862-5282
Keyword(s) CP-Ti powder
TH2 powder
ECAP compaction
rolling
dehydrogenation
Summary The present work investigates the optimal level of residual hydrogen in partially de-hydrogenated powder to produce CP-Ti plate compacts using ECAP with back pressure which are subsequently rolled at low temperature. A comparative study of the compaction of two TiH2 powders and a CP-Ti powder, with particle sizes 150 um, 50um and 45 um respectively, has been carried out. The hydride powders have also been compacted in a partially de-hydrogenated state. The optimal level of residual hydrogen with respect to the density of the resulting compact and the associated mechanical properties has been defined. ECAP at 300°C produced compacts from these partially de-hydrogenated powders of 99.5% theoretical density, while CP-Ti was compacted to almost full theoretical density under the same ECAP conditions. Therefore, the compaction of powder by ECAP does not benefit from temporary hydrogen alloying.

These compacts then were rolled at temperatures ranging from room temperature to 500°C with an 80% reduction in a single pass. Heat treatment after the rolling can modify the microstructure to improve the resulting mechanical properties and in this regard the temporary alloying with hydrogen has been observed to offer some significant benefits. It is shown the ECAP followed by low temperature rolling is a promising route to the batch production of fully dense CP-Ti wrought product from powder feedstock that avoids the need to subject the material to temperatures greater than 500°C. This low temperature route is expected to be efficient from an energy point of view and it also avoids the danger of interstitial contamination that accompanies most high temperature powder processing.
Notes
Every reasonable effort has been made to ensure that permission has been obtained for items included in Deakin Research Online. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au

Language eng
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 861199 Basic Metal Products (incl. Smelting, Rolling, Drawing and Extruding) not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2009, Carl Hanser Verlag GmbH
Persistent URL http://hdl.handle.net/10536/DRO/DU:30028411

Document type: Journal Article
Collections: Centre for Material and Fibre Innovation
Open Access Collection
Connect to link resolver
 
Link to Related Work
 
Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved.

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.

Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 0 times in TR Web of Science
Scopus Citation Count Cited 3 times in Scopus
Google Scholar Search Google Scholar
Access Statistics: 364 Abstract Views, 21 File Downloads  -  Detailed Statistics
Created: Tue, 20 Apr 2010, 16:53:43 EST by Sandra Dunoon

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.