The microstructure evolution and phase transformation behavior of a β-solidifying γ-TiAl alloy during creep

Liu, Yan; Li, Jinshan; Tang, Bin; Wang, William Yi; Chu, Yudong; Zhu, Lixia; Bi, Weiqing; Chen, Xiaofei; Kou, Hongchao

doi:10.1016/j.pnsc.2023.05.002

Cited by 6 publications

(1 citation statement)

References 52 publications

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“…Titanium–Aluminum (TiAl) has attracted the attention of scholars due to its high specific strength and good high-temperature performance [ 1 , 2 , 3 , 4 ]. The urgent problem to be solved for the TiAl alloy is to improve its brittleness at room temperature and enhance the high-temperature strength.…”

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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