Effects of chip conditions on the solid state recycling of Ti-6Al-4V machining chips

Lui, E. W., Palanisamy, S., Dargusch, M. S. and Xia, K. (2016) Effects of chip conditions on the solid state recycling of Ti-6Al-4V machining chips. Journal of Materials Processing Technology, 238 297-304. doi:10.1016/j.jmatprotec.2016.07.028

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Author Lui, E. W.
Palanisamy, S.
Dargusch, M. S.
Xia, K.
Title Effects of chip conditions on the solid state recycling of Ti-6Al-4V machining chips
Journal name Journal of Materials Processing Technology   Check publisher's open access policy
ISSN 0924-0136
Publication date 2016-12-01
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.jmatprotec.2016.07.028
Open Access Status File (Author Post-print)
Volume 238
Start page 297
End page 304
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Subject 2503 Ceramics and Composites
2611 Modelling and Simulation
1706 Computer Science Applications
2506 Metals and Alloys
2209 Industrial and Manufacturing Engineering
Abstract Five different types of Ti-6Al-4V machining chips were recycled in their solid state using equal channel angular pressing (ECAP). The chips were produced by either turning or milling with or without the application of a coolant. All the as-recycled materials achieved full density but their microstructures, including the prior chip boundary spacing and grain size, are dependent on the starting chip morphologies and dimensions. The differences, however, were largely removed in the subsequent mill-annealing processing consisting of β homogenisation, hot deformation and final annealing, leading to near-identical mill-annealed microstructures for all different types of chips consisting of equiaxed α + β grains with lamellar α, typical following such a treatment. The recycled and mill-annealed materials possess high yield strengths of  >900 MPa and satisfactory tensile ductility of  >11%, comparable or superior to the original commercial mill-annealed Ti-6Al-4V and independent of the initial chip conditions.
Keyword Oxide
Severe plastic deformation
Thermomechanical processing
Titanium alloys
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

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