• Chinese Journal of Lasers
  • Vol. 39, Issue 1, 103002 (2012)
Sun Jingchao*, Zhang Yongzhong, Gong Xinyong, and Liu Mingkun
Author Affiliations
  • [in Chinese]
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    DOI: 10.3788/cjl201239.0103002 Cite this Article Set citation alerts
    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 Copy Citation Text show less

    Abstract

    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.
    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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