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利用ＴＥＭ 技术观察和分析了２０９０ 和２０９０ ＋ Ｃｅ 两种合金中， 位错与Ｔ１ 相之间的交互作用行为， 发现Ｔ１ 相与位错间的交互作用是一种切过和绕过的混合型； 并利用脱溶相强化理论建立了相关的物理模型。实算结果表明， 在１９０ ℃时效３ ～４８ ｈ ， Ｔ１ 相的强化作用约占总的临界剪切应力（ＣＲＳＳ） 的３０ ％ ～６０ ％ ， 其强化作用随时效时间的延续而增强， 但过时效后增强作用平缓。２０９０ 和２０９０ ＋ Ｃｅ 两种合金对比结果表明， 在欠时效时， 两合金中 Ｔ１ 相的强化作用没有多大差异， 而过时效状态下， 含Ｃｅ 合金中Ｔ１ 相的强化作用略大于前者， 在仅考虑切过机制的情况下这种倾向尤为明显。欠时效时两合金基体强化作用约相差３ ．２ ＭＰａ ， 而过时效时两合金基体的强化作用约相差８ ．７ ＭＰａ 左右
The interaction between dislocation and T1 phase in both 2090 and 2090 + Ce alloys was observed and analyzed by TEM. It was found that the interaction between T1 phase and dislocation was a mixed type The relevant physical model was established by using the theory of desolvation strengthening. The calculated results show that the strengthening effect of T1 phase is about 30% -60% of the total critical shear stress (CRSS) at 190 ℃ for 3 ~ 48 h, and its strengthening effect increases with the aging time. However, After aging enhance the role of smooth. The results of comparison between 2090 and 2090 + Ce alloys show that there is not much difference in the strengthening effect of T1 phase between the two alloys when under aging, but the strengthening effect of T1 phase in Ce alloy is slightly greater than that of the former under over-aging condition. This tendency is particularly evident when the mechanism is cut. Insufficient aging effect when the two alloy matrix difference of about 3. 2 MPa, while the strengthening effect of the two alloy matrix is about 8 when the aging is over. 7 MPa or so