Conference Proceedings
Sintering of gamma titanium aluniinide (tial) alloys aided by small additions of copper
YXGB Schaffer, M Qian
Ti 2011 Proceedings of the 12th World Conference on Titanium | SCIENCE PRESS BEIJING | Published : 2012
Abstract
Titanium aluminide alloy powders are difficult to sinter unless assisted with pressure. This investigation explores the use of sintering aids to enable pressureless sintering of Ti-48Al-2Cr-2Nb in order to take advantage of the conventional powder metallurgy (PM) approach for low-cost near-net shape fabrication. Thermodynamic calculations using Thermo-Calc and Ti-alloys database TTTT3 predict that copper (Cu) is a potential sintering aid for Ti-48Al-2Cr-2Nb. The effect of Cu additions from 0 to 2 at. % on the sintering of Ti-48Al-2Cr-2Nb was accordingly assessed at 1375°C with 120 min isothermal holding in vacuum. The sintered density increased from (73. 9 ± 0. 6)% theoretical density (TD) w..
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Funding Acknowledgements
This work was supported by the Australian Research Council. YX wishes to thank The University of Queensland (UQ) for an UQ International Research Tuition Award (UQIRTA) and the China Scholarship Council (CSC) for a CSC scholarship.