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采用高分辨膨胀仪DIL 805 A/D研究了20 MPa压应力作用下Ti-1300合金在连续加热过程中ω相变。结果表明:20 MPa压应力抑制Ti-1300合金在连续加热时ω相变,相变开始点较无应力时有一定滞后。根据Kissinger-Akahira-Sunose模型计算得出20 MPa压应力作用下Ti-1300合金的ω相变的平均激活能为73 kJ/mol,高于无应力条件下的平均相变激活能(55 kJ/mol),亦说明压应力对合金的ω相变有一定的抑制作用,使β→ω相变更加困难。然而连续加热转变中,随ω相转变量的增加而相变激活能逐渐减小,说明压应力对ω相变的抑制作用逐渐减弱。
The high-resolution dilatometer DIL 805 A / D was used to study the ω phase transformation of Ti-1300 alloy during continuous heating under the compressive stress of 20 MPa. The results show that the compressive stress of 20 MPa restrains the phase transition of Ti-1300 alloy during continuous heating, and the starting point of phase transformation has a certain lag compared with no stress. According to the Kissinger-Akahira-Sunose model, the average activation energy of the ω-phase transformation of Ti-1300 alloy under the compressive stress of 20 MPa is 73 kJ / mol, which is higher than the average transformation activation energy (55 kJ / mol), also shows that the compressive stress on the alloy ω phase inhibition has some inhibition, the β → ω phase transition more difficult. However, in the continuous heating transformation, the phase transformation activation energy decreases gradually with the increase of ω phase transformation, indicating that the suppression of ω phase transformation is weakened gradually by compressive stress.