Chinese Journal of Lasers, Volume. 39, Issue 1, 103002(2012)
High-Temperature Tensile Rupture Life and Fracture Procedure of Laser Direct Deposited Ti60 Alloy and TiCp/Ti60 Composites
Ti60 alloy and TiCp (mass fraction of 5%)/Ti60 titanium matrix composites are fabricated by laser direct deposition process. The microstructure and tensile rupture life under 600 ℃ are investigated and compared. The results indicate that, for laser direct deposited TiCp/Ti60 composites, primary TiC appears as dendrites and distributes at the original β grain boundary, and the eutectic TiC appears as particulate and distributes between α laths. The existence of TiC results in refinement of the matrix. Compared with the Ti60 alloy, TiCp/Ti60 composite exhibits a superior rupture life and creep resistance under 600 ℃. The creep rupture of the composite is primarily initiated by a mixture of interface debonding between TiC and the matrix and interface voiding between α-Ti and β-Ti, which is followed by the ductile failure through the matrix.
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Sun Jingchao, Zhang Yongzhong, Gong Xinyong, Liu Mingkun. High-Temperature Tensile Rupture Life and Fracture Procedure of Laser Direct Deposited Ti60 Alloy and TiCp/Ti60 Composites[J]. Chinese Journal of Lasers, 2012, 39(1): 103002
Category: laser manufacturing
Received: Aug. 10, 2011
Accepted: --
Published Online: Dec. 22, 2011
The Author Email: Jingchao Sun (sunjingchao5@gmail.com)