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

Sun Jingchao*, Zhang Yongzhong, Gong Xinyong, and Liu Mingkun
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    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

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    Paper Information

    Category: laser manufacturing

    Received: Aug. 10, 2011

    Accepted: --

    Published Online: Dec. 22, 2011

    The Author Email: Jingchao Sun (sunjingchao5@gmail.com)

    DOI:10.3788/cjl201239.0103002

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