Influence of Heat Treatment on the Isothermal Oxidation of Fe-40Ni-24Cr Alloy

Authors

  • Noraziana Parimin School of Materials Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia
  • Esah Hamzah Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai Johor, Malaysia
  • Astuty Amrin UTM Razak School of Engineering & Advanced Technology, UTM Kuala Lumpur, 54100 Kuala Lumpur, Malaysia

Keywords:

isothermal oxidation, Fe-40Ni-24Cr alloy, heat treatment

Abstract

The isothermal oxidation behaviour of two different heat treated of Fe-40Ni-24Cr alloy was studied in this work. The present paper focuses on the isothermal oxidation behaviour at 700ºC. Heat treatment at 2 different temperatures, namely 1000ºC and 1200ºC was applied to Fe-40Ni-24Cr alloy to alter the grain size of the samples. The heat treatment results showed that the average grain size increased with increase in heat treatment temperature. Optical microscopy, Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDS) and X-Ray Diffraction (XRD) were employed in this study to analyse the oxidation behaviour of heat treated samples. The heat treated samples were subjected to oxidation experiment under isothermal conditions for 500 hours. The oxide scale formed during oxidation were generally complex consists of several oxide phases. The samples morphologies of oxidized samples were influenced by the alloy structure and expose conditions. The kinetics of oxidation followed the parabolic law which represent diffusion controlled oxide growth rate. Results indicate that the fine grain size of alloy heat treated at 1000ºC possess a better oxidation resistance and lowered the oxidation rate.

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Published

2020-12-01

How to Cite

Parimin, N. ., Hamzah, E. ., & Amrin, A. . (2020). Influence of Heat Treatment on the Isothermal Oxidation of Fe-40Ni-24Cr Alloy . Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 49(1), 69–76. Retrieved from https://www.akademiabaru.com/submit/index.php/arfmts/article/view/2288

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