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Effect of grain size on the isothermal oxidation of superalloys

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Main Authors: Noraziana, Parimin, Esah, Hamzah, Astuty, Amrin
Other Authors: noraziana@unimap.edu.my
Format: Article
Language:English
Published: American-Eurasian Network for Scientific Information (AENSI) 2014
Subjects:
Fe-Ni-Cr alloy
Grain size
Isothermal oxidation
Online Access:http://dspace.unimap.edu.my:80/dspace/handle/123456789/35394
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spelling my.unimap-353942014-06-11T12:16:06Z Effect of grain size on the isothermal oxidation of superalloys Noraziana, Parimin Esah, Hamzah Astuty, Amrin noraziana@unimap.edu.my esah@fkm.utm.my astuty@ic.utm.my Fe-Ni-Cr alloy Grain size Isothermal oxidation Link to publisher's homepage at http://www.aensiweb.com/ The oxidation behavior of two different grain sizes of superalloys is discussed. The present paper focused on the isothermal oxidation of Fe-33Ni-19Cr alloy at temperatures of 700 °C exposed in dry air for 500 hours. Different grain size of alloy was made of solution annealing treatment at different temperatures, namely, 950 °C and 1200 °C for fine and coarse grain, respectively. The results showed that the average grain size increased with increase in solution annealing temperature that was significantly affecting the oxidation kinetic of the materials. Optical microscopy, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) were employed in this study to analyze the oxidation behavior of solution-annealed samples. Results indicate that fine grain samples recorded the slow oxidation rate as compared to coarse grain samples. The analysis indicates that the fine grain sample resulting in an enhanced Cr diffusivity to form Cr rich oxides. The fine grain solution-annealed sample is an effective approach, which possess a better oxidation resistance and reduced oxidation rate. 2014-06-11T12:16:06Z 2014-06-11T12:16:06Z 2013-10 Article Advances in Environmental Biology, vol. 7(12), 2013, pages 3720-3725 1995-0756 (Print) 1998-1066 (Online) http://www.aensiweb.com/old/aeb_October-special_2013.html http://dspace.unimap.edu.my:80/dspace/handle/123456789/35394 en American-Eurasian Network for Scientific Information (AENSI)
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Fe-Ni-Cr alloy
Grain size
Isothermal oxidation
spellingShingle Fe-Ni-Cr alloy
Grain size
Isothermal oxidation
Noraziana, Parimin
Esah, Hamzah
Astuty, Amrin
Effect of grain size on the isothermal oxidation of superalloys
description Link to publisher's homepage at http://www.aensiweb.com/
author2 noraziana@unimap.edu.my
author_facet noraziana@unimap.edu.my
Noraziana, Parimin
Esah, Hamzah
Astuty, Amrin
format Article
author Noraziana, Parimin
Esah, Hamzah
Astuty, Amrin
author_sort Noraziana, Parimin
title Effect of grain size on the isothermal oxidation of superalloys
title_short Effect of grain size on the isothermal oxidation of superalloys
title_full Effect of grain size on the isothermal oxidation of superalloys
title_fullStr Effect of grain size on the isothermal oxidation of superalloys
title_full_unstemmed Effect of grain size on the isothermal oxidation of superalloys
title_sort effect of grain size on the isothermal oxidation of superalloys
publisher American-Eurasian Network for Scientific Information (AENSI)
publishDate 2014
url http://dspace.unimap.edu.my:80/dspace/handle/123456789/35394
_version_ 1643797781818638336
score 13.214268

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