Influence of heat treatment on impact wear resistance of TC4 titanium alloy

doi:10.13251/j.issn.0254-6051.2020.06.002

Abstract

Abstract: Hot rolled TC4 titanium alloy was annealed and solution treated+aged, respectively, the influence of different heat treatment processes on the mechanical properties and microstructure, as well as the impact wear resistance was studied. The results show that transformed β phase increases, and all of the strength, elongation and toughness are improved after annealing. As for the solution treated+aged specimen, the grain becomes finer and more homogeneous due to recrystallization, its strength is the highest but its elongation and toughness are lower than that of the hot rolled one. The annealed specimen has the lowest wear rate while the solution treated+aged specimen has the highest after 10 h impact wear experiment. Viewing from the fractography, the microcutting length on the annealed specimen is shorter, plastic stacking is observed at the end of microcutting, and the microstructure near wear surface is stretched plasticly. The better impact wear resistance of the annealed specimen can be attributed to its higher plasticity and toughness, which can absorb higher impact energy.

Key words: TC4 titanium alloy, heat treatment, impact wear, plastic deformation

CLC Number:

TG142

Yu Wenchao, Li Yunkun, Xue Yanjun, Sun Ting, Shi Jie. Influence of heat treatment on impact wear resistance of TC4 titanium alloy[J]. Heat Treatment of Metals, 2020, 45(6): 7-11.

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