Grain Size Dependence of Steady State Creep Rate in Sn-1 wt% Zn Alloy | ||||
| Egyptian Journal of Solids | ||||
| Article 15, Volume 23, Issue 2, 2000, Page 333-340 PDF (477.08 K) | ||||
| DOI: 10.21608/ejs.2000.151744 | ||||
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| Abstract | ||||
| The effect of grain size as well as ageing temperature on the steady state creep and microstructure parameters of Sn-1 wt% Zn alloy have been studied. The steady state creep rate •εs is found to increase with ageing temperature, whereas it decreases by increasing grain size. The relation between •εs and the ageing temperature was fitted by a computer program and was found to be expressed as ln •εs = Α + ΒT-1 with a strong negative correlation coefficient ≈ –1. The values of the activation energies controlling the creep process around the transformation temperature (423K) from (α+β) phases to β-phase were calculated. The variations of •εs and the microstructure parameters (a, c, Δa/ao and c/a) with the ageing temperature confirm the precipitation process of Zn-rich phase in the temperature range (393-413 K) and its dissolution in the temperature range (413 – 423 K). | ||||
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