Effect of first annealing cooling method on microstructure and properties of TC25 titanium alloy forgings

doi:10.13251/j.issn.0254-6051.2024.10.020

Abstract

Abstract: TC25 titanium alloy forged in the β phase region was subjected to double annealing treatment at (T_β-40) ℃+540 ℃, and the effect of first annealing cooling methods (box cooling, air cooling, forced air cooling) on the microstructure and properties of the TC25 titanium alloy forgings was studied. The results show that the microstructure of the alloy forgings is basket weave consisting of lamellar α phase and β transformed structure under different first annealing cooling methods. As the cooling rate increases, the size of lamellar α phase reduces, in the meantime the tensile properties improve, but plasticity and impact properties decrease. The TC25 titanium alloy forgings have good room temperature and high temperature strength and toughness matching under air cooling.

Key words: TC25 titanium alloy, double annealing, first annealing cooling method, microstructure, mechanical properties

CLC Number:

TG156.21

Xiao Ting, Ma Bin, Xuan Hang. Effect of first annealing cooling method on microstructure and properties of TC25 titanium alloy forgings[J]. Heat Treatment of Metals, 2024, 49(10): 118-120.

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