Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1610906 | Journal of Alloys and Compounds | 2014 | 6 Pages |
Abstract
The effect of 0.5, 1, 1.5 and 2Â wt% Cu addition on the microstructure and mechanical properties of Al-30Â wt% Zn alloy has been investigated by stress-strain tests carried out in the temperature range from 508 to 608Â K. The work-hardening parameters of the test alloys decreased with increasing the deformation temperature and exhibited discontinuity at 548Â K, resulting two deformation temperature regions, the low-temperature region (below 548Â K) and high-temperature region (above 548Â K). The activation energy of fracture mechanisms has been calculated and found to be 19.6 and 33.2Â kJ/mol at the low and high temperature regions respectively. The operating mechanisms of work-hardening of the test alloys were confirmed by the analysis of X-ray diffraction patterns.
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Authors
A.F. Abd El-Rehim, M.S. Sakr, M.M. El-Sayed, M. Abd El-Hafez,