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Journal of Engineering and Applied Sciences
Year: 2008  |  Volume: 3  |  Issue: 4  |  Page No.: 299 - 302

Effects of Initial Grain Size on Recrystalization and Mechanical Properties of Steel

A. Adebayo and I.O. Ogunleye    

Abstract: The effects of initial grain size on recrystallization and mechanical properties of steel was investigated using mild steel specimens at a different soaking temperature of 750, 850, 950 and 1050C, respectively at holding time of 10 min for each specimen. The specimens were subjected to both impact test and tensile test to identify the effect of initial grain size on its mechanical properties. It was observed that the value of its initial grain size increases from 17-77 microns as the recrystallization temperature increases from 750-1050C. It was also observed that the impact strength increased from 21.5-26.55J as the initial grain increases. Also, the percentage elongation and strain increases as the initial grain size increases from 7.7-10.55 and 0.08-0.11% but the values of ultimate stresses and yield stresses decreases from 6.27-5.28 and 4.46-3.70 MN m 2 as the initial grain size increase from 17-77 microns.

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