• Chinese Journal of Lasers
  • Vol. 38, Issue 3, 303004 (2011)
Sun Jingchao1、*, Zhang Yongzhong1, Huang Can1, Li Yan1, and Li Guowei2
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    DOI: 10.3788/cjl201138.0303004 Cite this Article Set citation alerts
    Sun Jingchao, Zhang Yongzhong, Huang Can, Li Yan, Li Guowei. Microstructure and High Temperature Tensile Properties of Laser Direct Deposited Ti60 Alloy and TiCP/Ti60 Composites[J]. Chinese Journal of Lasers, 2011, 38(3): 303004 Copy Citation Text show less

    Abstract

    Wall-like Ti60 alloy and TiCP(mass fraction 5%)/Ti60 titanium matrix composites are fabricated by laser direct deposition process. Their microstructure and tensile properties under 600 ℃ are investigated. The results indicate that the deposited Ti60 alloy presents a widmanstatten structure with some spherical rare earth phases distributing along the sub-grain boundaries and the α/β interface. For the deposited TiCP/Ti60 composites, there are some un-melted TiC particles and re-solidified TiC particles appear as discontinuous chain-like. The TiC particles distribute uniformly within the matrix with good interface bonding. Under 600 ℃, the ultimate tensile strength (UTS) of TiCP/Ti60 composites is 65 MPa higher than that of Ti60 alloy, following with decreased elongation. Ti60 alloy exhibit ductile fracture characteristics, while TiCP/Ti60 composite exhibit some complicated fracture characteristics including intergranular fracture, quasi-cleavage crack and local ductile rupture.
    Sun Jingchao, Zhang Yongzhong, Huang Can, Li Yan, Li Guowei. Microstructure and High Temperature Tensile Properties of Laser Direct Deposited Ti60 Alloy and TiCP/Ti60 Composites[J]. Chinese Journal of Lasers, 2011, 38(3): 303004
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