【摘 要】
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A new metastable β type titanium alloy called TB-13 with the combination of excellent strength and ductility was developed successfully. In order to develop a
【机 构】
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State Key Laboratory of Solidification Processing,Beijing Institute of Aeronautical Materials
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A new metastable β type titanium alloy called TB-13 with the combination of excellent strength and ductility was developed successfully. In order to develop a perspective on this new alloy, the influence of several commonly used heat treatments on the microstructure and properties was studied. In solution-treated and quenched samples, a low-temperature aging at 480 ℃ results in the precipitation of finer α phase. The precipitation of coarser α phase plate at higher aging temperature (560 ℃) leads to the increase of tensile ductility but reduction of strength. During low-temperature aging at 300 ℃, quite homogeneous distribution of fine isothermal ω phase particles was found. The isothermal ω phase provides nucleation sites for α phase during two-step aging process and makes α phase extremely fine and disperse uniformly in β matrix. Thus, TB-13 alloy is strengthened and its mechanical properties are improved.
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