层错能对高能球磨铜合金的影响

试验中以球磨的方法制备了一系列不同成份的Cu—Zn及Cu—Al合金（层错能〈75MJ／m^2）。对Zn和Al的固溶强化效果及其降低铜合金层错能的作用进行了研究。实验结果显示，随着Zn或Al含量的升高，（试样的）显微硬度（HV）值增加，符合固溶强化的规律。在相近原子百分比的条件下比较Cu—Zn和Cu—Al合金的HV值，显示当合金中无第二相出现时，Zn的固溶强化效果优于Al；另一方面，随着Zn％及Al％（原子百分比）的增加，Cu～Zn及Cu—Al合金的层错能下降，而层错能的降低导致了强化的产生，这种情况下Zn和Al的不同强，L化效果可以用公式k=Gb/2π（1-v）（a-δ·FE）^[1]来评价，式中K是Hall—Petch关系的斜率。评价的结果与实验数据（合金的显微硬度值）是相吻合的。

Influences of Stacking Fault Energy on High-Energy Ball Milling Cu Alloy

A series of Cu - Zn and Cu - Al alloys （ SFE 〈 75MJ/m^2 ） with different components were fabricated by the ball mill- ing. The solid solution strengthening effect of Al and Zn, and their action of reducing Cu alloy stacking fault energy （SFE） were studied. The test results showed that with the increase of Zn and Al content, the micro -hardness value （HV） of the test sample went up, which accords with the rule of solid solution strengthening. By comparing the HV of Cu - Zn and Cu - Al alloys of very near atomic percent of Zn and Al elements, it was found that the solid solution strengthening effect of Zn element is superior to Al＇s on the condition that the second phase has not appeared. In addition, the SFE of Cu - Zn and Cu - Al alloy decreased with the increase of Zn and Al content, which resulted in Gb solid solution strengthening. The different strengthening effect of Zn and Al can be compared by the formula k=Gb/2π（1-v）（a-δ·FE）^[1], where K is the slope of Hall- Petch relationship. The comparison result is in agreement with experiment data （Alloys＇ micro - hardness values）.