Warm die compaction and sintering of titanium and titanium alloy powders

Luo, S. D., Yang, Y. F., Schaffer, G. B. and Qian, M. (2014) Warm die compaction and sintering of titanium and titanium alloy powders. Journal of Materials Processing Technology, 214 3: 660-666. doi:10.1016/j.jmatprotec.2013.10.010

Author Luo, S. D.
Yang, Y. F.
Schaffer, G. B.
Qian, M.
Title Warm die compaction and sintering of titanium and titanium alloy powders
Journal name Journal of Materials Processing Technology   Check publisher's open access policy
ISSN 0924-0136
Publication date 2014-04
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.jmatprotec.2013.10.010
Open Access Status
Volume 214
Issue 3
Start page 660
End page 666
Total pages 7
Place of publication Lausanne, Switzerland
Publisher Elsevier
Collection year 2014
Language eng
Subject 1706 Computer Science Applications
2611 Modelling and Simulation
2503 Ceramics and Composites
2506 Metals and Alloys
2209 Industrial and Manufacturing Engineering
Abstract A study has been made of the effect of non-lubricated warm die (200 C) compaction on the densification of hydride-dehydride (HDH) Ti powder, pre-alloyed (PA) Ti-6Al-4V and Ti-10V-2Fe-3Al powders, and HDH Ti and V-Fe-Al master alloy powder blends, compared to cold die compaction. Depending on the compaction pressure, which was varied from 200 to 1000 MPa, non-lubricated warm die (200 C) compaction was very effective for -100 mesh HDH Ti powder, increasing the green density by 5.0-9.4% theoretical density (TD). Die wall lubrication with stearic acid showed no influence on the green density when compacted at 800 MPa. With warm die (200 C) compaction, achieving a green density of greater than 90%TD was straightforward for HDH Ti powder when compacted at ≥750 MPa. Accordingly, near pore-free (≥99.5%TD) Ti microstructures were obtained after sintering at 1300 C for 120 min in vacuum when compacted at 1000 MPa. The resulting increment in the sintered density was between 2.0%TD and 4.4%TD. Warm die (200 C) compaction showed no effect on PA Ti-10V-2Fe-3Al powder and only a small effect on PA Ti-6Al-4V powder when compacted at 1000 MPa. However, it was still virtually effective for Ti-10V-2Fe-3Al powder blends made of HDH Ti powder and V-Fe-Al master alloy powder. The observations were compared with literature data and discussed in accordance with the yield strength of Ti, Ti-6Al-4V, Ti-10V-2Fe-3Al and Al 3V as a function of temperature.
Keyword Pre-alloyed titanium powder
Titanium powder
Warm die compaction
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 29 October 2013.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2014 Collection
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