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International Journal of Mechanical and Industrial Engineering

Abstract

The oxidation behaviour of Low alloy steel its German designation (20mnmoni55) and AISI 304 steel has been studied in air under cyclic conditions at 900°C for 50 hr cyclic. Oxidation kinetics was established by thermogravimetric technique. Each cycle consisted of 1 hour heating at 900°C followed by 20 min of cooling in air. Low alloy steel sample followed somewhat linear rate of oxidation with more weight gain while AISI 304 sample followed the non-linear rate law of oxidation with less weight gain. The microstructural feature and phase transformation of oxide scales were characterise by X-ray diffraction (XRD) and field emission scanning electron microscopy/energy dispersive X-ray (FESEM/EDAX) techniques.

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