晶内滑移

热变形激活能Q值随应变量的增加而下降，应变速率敏感性指数m值随应变量的增加而上升，表明了变形机理由晶内滑移转变为晶界滑移为主。

It was discovered that the values of activation energy Q decrease and the values of strain-rate sensitivity in increase with increase of capacity of the strain . This indicates that a in-grain slip has been transformed into a grain boundary slip in its major deformation mechanism .

在600℃～800℃下，TAWY合金高温变形过程中的加工硬化，受晶内位错滑移机制控制。

At 600 ° C ~ 800 ° C , the hardworking ability is controlled by the dislocation sliding in y grains during the deformed processing .

晶界滑动是超塑变形的主要机制，晶内位错滑移和扩散蠕变则对晶界滑动起着协调作用。

It is shown that grain boundary sliding is the dominate flow mechanism and is accommodated by intergranular dislocation slip and diffusion creep .

晶内位错滑移和扩散蠕变作为重要的协调机制，促进了晶界滑动的顺利进行.该合金的超塑性变形机制符合位错协调晶界滑动模型。

The dislocation sliding in grain and diffusion creep , as two kinds of important coordination mechanism , promote the development of grain-boundary sliding . The superplastic deformation mechanism accords with the model of dislocation coordinating grain-boundary sliding .

在523K-623K压缩温度范围内，试验材料的热激活能均小于铝的晶界自扩散激活能，表明该温度范围内试验材料的变形机制是以晶内位错滑移及攀移为主要特征。

The thermal activation energies of all test material composites were lower than the thermal activation energy of self-diffusion of grain boundary ranged the temperatures from 523K to 623K , which indicated that the deformation mechanism were characterized by sliding and climbing of dislocations in the grains .

如果应变超出极限值，则会导致晶间裂纹和晶内滑移，带来不可逆的残余应变。

However , the intergranular cracks and the internal slips may be appeared , as well as the unreversible residual strain may be then remained if it exceeded the limit .

结果表明，微塑性变形Ⅰ阶段具有相当低的硬化指数，它对应于晶界对位错的吸收及晶内位错的单滑移；

The results show that stage I of microplastic deformation , with rather low hardening exponent , corresponds to dislocation annihilation in grain boundary and single glide within grains , and stage ⅱ, with high hardening exponent , is the result of multiple glide in whole grain .

α相晶内几乎不变形，作为界面滑动调节机制的晶内滑移主要在β相内发生。

Practically there is no deformation in a phase and the intragranular slip , as an accommodating mechanism , mainly occurs in β phase in the superplastic range .