论文部分内容阅读
用超声气体雾化法制备了两种合金化程度较高的新型铝合金,在超声雾化的快速凝固过程中合金得到了很细的显微组织,因而在一定的温度和应变速率下合金具有超塑性。一种 A1-6.7Mg-1.6Li 铝合金在325℃,开始应变速率10~(-2)/秒下显示的最大延伸率为184%,而另一种×7091合金在400℃,开始应变速率9×10~(-3)/秒时呈现218%的延伸率。和常规铸造加锻造的铝合金不同,快速凝固的粉末铝合金在比较高的应变速率下(10~(-2)/秒)即可出现超塑性。
Two kinds of new aluminum alloy with higher degree of alloying were prepared by ultrasonic gas atomization method. The alloy was very fine microstructure during the rapid solidification process of ultrasonic atomization. Therefore, the alloy had the following properties under certain temperature and strain rate Superplasticity. An A1-6.7Mg-1.6Li aluminum alloy shows a maximum elongation of 184% at a start strain rate of 10-2 / sec at 325 ° C and a start strain rate of another type of 7091 alloy at 400 ° C An elongation of 218% was exhibited at 9 × 10 -3 / sec. Unlike conventional cast and forged aluminum alloys, the rapidly solidified powdery aluminum alloys can develop superplasticity at higher strain rates (10 -2 / s).