基于某些金属材料在经受交替地升高与降低温度到其固态相变温度以上和以下时,施加很小的应力即能被伸长并呈现高的延伸特性的现象,称为动态超塑性。本发明一方面提供一种能利用动态超塑性成形金属材料(如上定义的)的方法。此法包括使材料受到一系列温度——时间循环处理,将材料加热和冷却到相变温度以上和 A phenomenon known as dynamic superplasticity based on the fact that certain metallic materials are able to elongate and exhibit high extensional properties with little stress when subjected to alternating increases and decreases in temperature below and below their solid phase transition temperature. In one aspect, the present invention provides a method that utilizes a dynamic superplastic forming metal material (as defined above). This method involves subjecting the material to a series of temperature-time cycles that heat and cool the material above the phase transition temperature and