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用电子湮没 Doppler 展宽能谱测量了 Cu 24.9wt%Zn—4.5wt,Al 合金母相和马氏体相状态下不同弯曲度变形应变量的线性参数 S。在母相状态弯曲变形过程中,变形初期 S 参数急剧增加,随着应变量增大.S 参数增加缓慢,当应变量为10%左右时,S 参数趋于饱和;在马氏体相状态弯曲变形过程中,变形初期 S 参数(几乎)不增加,应变量超过5%左右,S 参数明显增加,应变量超过10%,S 参数也呈现饱和。实验结果和分析表明该合金不同状态下的宏观弯曲变形有不同的微观机制。
The linear parameter S of different bending deformation strain quantities was measured by electron annihilation Doppler broadening energy spectrum. The results show that the deformation parameters of Cu 24.9wt% Zn-4.5wt, Al alloy are different. During the bending deformation of the parent phase, the S parameter increases sharply at the initial stage of deformation, and the S parameter increases slowly with the increase of the strain amount. When the strain amount is about 10%, the S parameter tends to be saturated. When the martensitic phase is bent In the deformation process, the S parameter (almost) did not increase (almost) at the initial stage of deformation, the strain exceeded 5%, the S parameter increased obviously, the strain exceeded 10% and the S parameter also saturate. The experimental results and analysis show that the alloy has different microscopic mechanisms under different states of macro-bending deformation.