Analysis of microstructure and strengthening in pure titanium recycled from machining chips by equal channel angular pressing using electron backscatter diffraction

Luo, P., McDonald, D. T., Zhu, S. M., Palanisamy, S., Dargusch, M. S. and Xia, K. (2012) Analysis of microstructure and strengthening in pure titanium recycled from machining chips by equal channel angular pressing using electron backscatter diffraction. Materials Science and Engineering: A, 538 : 252-258.


Author Luo, P.
McDonald, D. T.
Zhu, S. M.
Palanisamy, S.
Dargusch, M. S.
Xia, K.
Title Analysis of microstructure and strengthening in pure titanium recycled from machining chips by equal channel angular pressing using electron backscatter diffraction
Journal name Materials Science and Engineering: A   Check publisher's open access policy
ISSN 0921-5093
1873-4936
Publication date 2012-03-15
Sub-type Article (original research)
DOI 10.1016/j.msea.2012.01.039
Volume 538
Start page 252
End page 258
Total pages 7
Place of publication Lausanne, Switzerland
Publisher Elsevier S.A.
Collection year 2013
Language eng
Abstract Equal channel angular pressing (ECAP) was used to realise solid-state recycling of pure titanium machining chips. Fully dense bulk Ti with ultrafine grain sizes was obtained after ECAP at 450 °C although the grains were coarser at the higher consolidation temperature of 590 °C. The yield strength of the recycled Ti obeys the Hall–Petch relationship and reaches 650 MPa after consolidation at 450 °C for two passes. The strengths achieved are comparable to those observed in other Ti produced by ingot metallurgy with similar grain sizes. Analyses show that the strengthening is primarily due to grain size refinement rather than oxide dispersion, and low angle grain boundaries make significant contributions especially at the lower processing temperature.
Keyword Titanium
Recycling
Equal channel angular pressing (ECAP)
Electron backscatter diffraction (EBSD)
Machining chips
Hall-Petch relationship
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2013 Collection
 
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