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采用纳米压痕法测量了4 GPa压力处理前后Cu-11.68Al合金的塑性变形量,并借助光学显微镜和透射电镜对其组织进行分析,探讨了4 GPa压力处理对Cu-11.68Al合金塑性变形的影响。结果表明,4 GPa压力处理能细化Cu-11.68Al合金组织,增大组织内部的位错密度,有效地减小Cu-11.68Al合金的塑性变形量,经2000μN载荷保持30 s后,4 GPa压力处理后Cu-11.68Al合金的塑性变形量为98.22 nm,较高压处理前减少了22.13%。
The plastic deformation of Cu-11.68Al alloy before and after 4 GPa pressure treatment was measured by nanoindentation method. The microstructure of Cu-11.68Al alloy was analyzed by optical microscope and transmission electron microscope. The effects of 4 GPa pressure on the plastic deformation of Cu-11.68Al alloy influences. The results show that the 4 GPa pressure treatment can refine the Cu-11.68Al alloy structure, increase the dislocation density in the microstructure and reduce the plastic deformation of the Cu-11.68Al alloy effectively. After holding at 2000μN for 30s, The plastic deformation of Cu-11.68Al alloy after pressure treatment is 98.22 nm, which is decreased by 22.13% compared with that before high pressure treatment.