The softening fraction Fs increased as the time of the isothermal gap prolonged; and the higher the temperature of the deformation and interval, the bigger the softening fraction.

• 结果表明，在热压缩变形道次间保温停歇之后，流变应力出现明显的软化现象，保温停歇时间越长，合金软化率越高；变形及停歇保持温度越高，合金软化越严重。