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采用拉伸试验，研究了不同应变速率（10-5－10-1s-1）下温度对具有近全片层组织的γ＋α2双相Tial合金的屈服强度和延伸率的影响，得到Tial合金韧脆转变温度随应变速率升高而升高的变化关系，随后确定Tial合金韧脆转变激活能为324kJ／mol．这一激活能数值与Tial合金中原子自扩散激活能相当.结合断口分析和理论计算结果，认为Tial合金韧脆转变过程可能受位错攀移机制控制.
Tensile tests were carried out to study the effect of temperature at different strain rates (10-5-10-1s-1) on the yield strength and elongation of the γ + α2 Biphase Tial alloy with nearly full lamellar microstructure. The transition temperature changes with the increase of strain rate, and then the activation energy of the ductile-brittle transition of Tial alloy is 324kJ / mol. The value of this activation energy is equivalent to the self-diffusion activation energy of the Tial alloy.According to the fracture analysis and theoretical calculation, it is considered that the ductile-brittle transition process of the Tial alloy may be controlled by the dislocation climbing mechanism.