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铝青铜 QAl 10-3-1.5合金经超细化预处理工艺后,在830℃以初始应变速率(?)=1.67×10~(-3)s(-1)拉伸,得最高延伸率823%,流动应力23.67MPa。合金在拉伸变形时,其组织由α+β+δ三相构成;α相较硬,晶粒始终保持微细等轴状,其等轴比在1.01～1.36范围内。显微组织参数恰是微细晶粒超塑性所要求的组织条件。试样的断裂是由于在变形后期,因空洞长大连接所致。
Aluminum bronze QAl 10-3-1.5 alloy after ultrafine pretreatment process, at 830 ℃ with the initial strain rate (?) = 1.67 × 10 ~ (-3) s (-1) stretching, the highest elongation 823 %, Flow stress 23.67MPa. The microstructure of the alloy is composed of α + β + δ three phases when the alloy is in tensile deformation. The α phase is hard and the grains are always equiaxed with the equiaxed ratio in the range of 1.01-1.36. Microstructure parameters are precisely the microstructure requirements for the superplasticity of the grain. The fracture of the specimen is due to the growth of the void in the late deformation due to the connection.