Effect of Zr Mass Fraction on Microstructure and Mechanical Properties of Cu-W Alloy
Cu-W-Zrx(x=0,10%,15%,20%)alloys were prepared by powder metallurgy method,the effect of Zr element addition and its different mass fractions on the microstructure and mechanical properties of the alloys was investigated.The final results of this experiment showed that,with the increase of Zr mass fraction,the solid solution degree of Cu-W increased,and the densification of Cu-W-Zrx alloy was improved;the hardness and wear resistance of the alloy increased with the increase of Zr mass fraction,and the average hardness and wear resistance of the alloy reached the maximum at 20%,but the experimental data showed that the alloy was not homogeneous when the Zr mass fraction was 20%.Subsequent isolated Hopkinson compression bar tests on the alloy showed that the dynamic yield strength of the alloy increased with the increase of strain rate of the alloy,the strain rate reached the maximum at Cu-W-Zr15,and the specimen did not fracture under the high strain rate loading conditions,demonstrating good toughness.
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