Microstructure dependence of yielding and fracture in Cd-Zn alloys |
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| Authors: | M. S. Sakr A. A. El-Shazly M. M. Mostafa H. A. El-Sayed A. A. Mohamed |
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| Affiliation: | (1) Physics Department, Faculty of Education, Ain Shams University, Cairo, Egypt;(2) Physics Department, Faculty of Science, Ain Shams University, Cairo, Egypt |
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| Abstract: | The coefficient of logarithmic work-hardening, the yield stress and the fracture stress of Cd-2 wt. %Zn alloy of different grain diameters and of Cd-17·4 wt. %Zn alloy decrease with increasing working temperature. Two relaxation temperature regions have been found, the low-temperature region of relaxation (below 483 K) and the high-temperature region (above 483 K). The fracture surface energy for Cd-2 wt. % Zn alloy has been calculated and found to be 1·2 J/m2 at the two temperature regions of relaxation. X-ray investigations show that the residual internal strains in the deformed samples increase with increasing working temperature and exhibit a peak value at 483 K. |
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