In situ synthesis of nano/micron Ti2AlC reinforced high-Nb TiAl composites: Microstructure and mechanical properties

Guo, Yingchao; Liang, Yongfeng; Lin, Junpin

doi:10.1016/j.intermet.2023.107937

Cited by 11 publications

(1 citation statement)

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“…MAX phase is a kind of reinforcement with excellent high temperature mechanical properties [ 14 , 15 , 16 ]. Meanwhile, the generation and growth of Ti 2 AlC/Ti 2 AlN in TiAl alloys have already been proven [ 17 , 18 , 19 , 20 ]. MAX phases such as Ti 2 AlC and Ti 2 AlN have good mechanical properties at the service temperature of TiAl alloys, including their high temperature strength and high temperature ductility.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Dual Scaled NbC/Ti2AlC Reinforced Titanium–Aluminum Composite

Cui

Wang

2023

Materials

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A TiAl composite containing hybrid particles and whisker reinforcements is fabricated by vacuum melting. The results of this study show that the comprehensive mechanical properties and refining effect of the material are best when the content of reinforcement is 1 wt.%, and then the mechanical properties begin to deteriorate as the content increases further. Finely dispersed NbC particles and uniformly dispersed Ti2AlC whiskers are the ideal second phases. The synergistic strengthening effect of NbC particles and in situ Ti2AlC whiskers are key to the improvement of mechanical properties. Compared with the TiAlNb matrix, the fracture stress/strain of the composite at 1073 K is improved from 612 MPa/19.4% to 836 MPa/26.6%; the fracture toughness at room temperature is improved from 18.8 MPa/m2 to 27.4 MPa/m2.

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