By observing the production of cavities and measuring the growth of cavities, a model explaining the formation of cavity nucleus in superplasticmaterial was given out.
通过观察空洞的产生和测定空洞的长大，提出了一种超塑材料空洞的形核模型。
2
This part by superplastic forming process if simpler and saving material over 60% than by machining process.
与原机加工工艺相比，超塑性成形该零件的工艺简单，节省材料60%以上。
3
This paper introduces a method to controll a superplastic bulging by a gas-pressure and a height curve. This method can significantly reduce the thinning rate and unevenness of bulging material.