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由于超塑性预处理工艺繁杂,人们一直努力简化超塑性预处理工艺。1986年Ghosh预言动态再结晶能使粗晶粒合金呈现出超塑性。根据这一观点,Chokshi做了一个有意义的试验:将经过超塑性预处理的Al-2.6％Cu-2.4％Li-0.2％Zr合金进行再结晶退火,使其表面形成一层深度约50μm的粗晶粒层。然后进行超塑性变形,发现粗晶层对超塑性性能并无影响,粗晶层在变形过程中被细化。根据Ghosh的观点和Chokshi的实验事实,作者直
Due to the complexity of the superplasticity pretreatment process, efforts have been made to simplify the superplasticity pretreatment process. In 1986, Ghosh predicted that dynamic recrystallization made the coarse-grained alloy appear superplastic. From this point of view, Chokshi made a meaningful experiment by recrystallizing Al-2.6% Cu-2.4% Li-0.2% Zr alloy superplasticized pre-treated to a depth of about 50μm Coarse grain layer. Then the superplastic deformation and found that the super-plastic layer of coarse-grained layer has no effect on the coarse-grained layer in the deformation process is refined. According to Ghosh’s point of view and Chokshi’s experimental facts, the author straight