Abstract
The role of lubrication on the consolidation behaviour of titanium powder, density increase and change in microstructure on subsequent sintering was investigated. HDH titanium powder mixed with 0-2wt% stearic acid or magnesium stearate was cold compacted. It was found that 0.3-0.6wt% of internal lubricant significantly improves the compressibility. However, more than 0.6wt% of lubricant aids the densification in the low-pressure region but limits the maximum density at high pressure. Moreover, 0.3-0.6wt% of lubricant offers a more uniform density distribution to the powder compact, while greater than 0.6wt% of lubricant leads to a segregation of lubricant in the surface region. The shape retention, ejection behaviour, de-lubrication behaviour and sintered properties were also studied in this work.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference7 articles.
1. A. Simchi, Effects of lubrication procedure on the consolidation, sintering and microstructural features of powder compacts, Mater. Des., 24(2003) 585-594.
2. N. Solimanjad and R. Larsson, Die wall friction and influence of some process parameters on friction in iron powder compaction, Mater. Sci. Technol., 19(2003) 1777-1782.
3. N. Özkan and B. J. Briscoe, Characterization of Die-Pressed Green Compacts, J. Eur. Ceram. Soc., 17 (1997) 697-711.
4. M. Qian, Cold compaction and sintering of titanium and its alloys for near-net shape or preform fabrication, Inter. J. Powder Metallurgy. 46 (2010) 29-44.
5. S.T. Hong, Y. Hovanski, C.A. Lavender and K.S. Weil, Investigation of Die Stress Profiles During Powder Compaction Using Instrumented Die, J. Mater. Eng. Perform., 17(2008) 382–386.
Cited by
8 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献