Observation on void formed in oxide scale of Fe-Cr-Ni alloy at 1073K in dry and humid environments

Void formation in oxide scale during high temperature oxidation is a common phenomenon.Over a long period of time voids will affect the mechanical property of scales by influencing the cracking and spalling. Voids formed in dry environment are different than that of formed in humid environment. W...

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Main Authors:	Akhbar, Kaderi, Ani, Mohd Hanafi, Othman, Raihan, Mohd Zainal, Ahmad Zaki
Format:	Conference or Workshop Item
Language:	English
Published:	2011
Subjects:	TA401 Materials of engineering and construction
Online Access:	http://irep.iium.edu.my/4128/ http://irep.iium.edu.my/4128/ http://irep.iium.edu.my/4128/1/Observation_on_Void_Formed_in_Oxide_Scale_of_Fe-Cr-Ni_Alloy_at_1073_K_in_Dry_and_Humid_Environments.pdf

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recordtype	eprints
spelling	iium-41282011-11-21T03:24:27Z http://irep.iium.edu.my/4128/ Observation on void formed in oxide scale of Fe-Cr-Ni alloy at 1073K in dry and humid environments Akhbar, Kaderi Ani, Mohd Hanafi Othman, Raihan Mohd Zainal, Ahmad Zaki TA401 Materials of engineering and construction Void formation in oxide scale during high temperature oxidation is a common phenomenon.Over a long period of time voids will affect the mechanical property of scales by influencing the cracking and spalling. Voids formed in dry environment are different than that of formed in humid environment. With the presence of water vapor in humid environment the formation of void will increase, thus greater number of void compared to that in dry environment. Fe-Cr-Ni alloy samples were exposed isothermally at 1073 K in air ((POO2=0.21atm = 2.1 × 10 5 Pa) and humid (air + steam) environments. XRD analysis done to all samples confirms that Fe2O3, Fe3O4, NiCr2O4, FeCr2O4, Cr2O3 and NiO phases exist in the scale. EDX analysis done shows varying compositions of Fe,Cr,Ni and O in outer and inner oxide scale, oxide scale/metal interface and metal. Field emission scanning electron microscope (FE-SEM) was used to investigate voids formed in the cross sections of the oxidized samples. Volume fraction of voids in the oxide scale was calculated in accordance to the cross sectional area fraction of voids in the scale. It shows that Fe-Cr-Ni alloy samples exposed in humid environment has as high as 71% more voids than that exposed in dry environment. It is concluded that the humid environment increased the number of void formed in the oxide scale, thus facilitates the exfoliation of protective scale during the oxidation. 2011-06 Conference or Workshop Item NonPeerReviewed application/pdf en http://irep.iium.edu.my/4128/1/Observation_on_Void_Formed_in_Oxide_Scale_of_Fe-Cr-Ni_Alloy_at_1073_K_in_Dry_and_Humid_Environments.pdf Akhbar, Kaderi and Ani, Mohd Hanafi and Othman, Raihan and Mohd Zainal, Ahmad Zaki (2011) Observation on void formed in oxide scale of Fe-Cr-Ni alloy at 1073K in dry and humid environments. In: 2nd International Conference on Mechanical and Manufacturing Engineering 2011 (ICME 2011), 6-7th June 2011, Perbadanan Putrajaya Complex, Putrajaya. (Unpublished) http://ucitv.uthm.edu.my/ucitveos53/Viewer/?peid=a705eae1-7b99-4dd3-8f15-57829cd17a24
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TA401 Materials of engineering and construction
spellingShingle	TA401 Materials of engineering and construction Akhbar, Kaderi Ani, Mohd Hanafi Othman, Raihan Mohd Zainal, Ahmad Zaki Observation on void formed in oxide scale of Fe-Cr-Ni alloy at 1073K in dry and humid environments
description	Void formation in oxide scale during high temperature oxidation is a common phenomenon.Over a long period of time voids will affect the mechanical property of scales by influencing the cracking and spalling. Voids formed in dry environment are different than that of formed in humid environment. With the presence of water vapor in humid environment the formation of void will increase, thus greater number of void compared to that in dry environment. Fe-Cr-Ni alloy samples were exposed isothermally at 1073 K in air ((POO2=0.21atm = 2.1 × 10 5 Pa) and humid (air + steam) environments. XRD analysis done to all samples confirms that Fe2O3, Fe3O4, NiCr2O4, FeCr2O4, Cr2O3 and NiO phases exist in the scale. EDX analysis done shows varying compositions of Fe,Cr,Ni and O in outer and inner oxide scale, oxide scale/metal interface and metal. Field emission scanning electron microscope (FE-SEM) was used to investigate voids formed in the cross sections of the oxidized samples. Volume fraction of voids in the oxide scale was calculated in accordance to the cross sectional area fraction of voids in the scale. It shows that Fe-Cr-Ni alloy samples exposed in humid environment has as high as 71% more voids than that exposed in dry environment. It is concluded that the humid environment increased the number of void formed in the oxide scale, thus facilitates the exfoliation of protective scale during the oxidation.
format	Conference or Workshop Item
author	Akhbar, Kaderi Ani, Mohd Hanafi Othman, Raihan Mohd Zainal, Ahmad Zaki
author_facet	Akhbar, Kaderi Ani, Mohd Hanafi Othman, Raihan Mohd Zainal, Ahmad Zaki
author_sort	Akhbar, Kaderi
title	Observation on void formed in oxide scale of Fe-Cr-Ni alloy at 1073K in dry and humid environments
title_short	Observation on void formed in oxide scale of Fe-Cr-Ni alloy at 1073K in dry and humid environments
title_full	Observation on void formed in oxide scale of Fe-Cr-Ni alloy at 1073K in dry and humid environments
title_fullStr	Observation on void formed in oxide scale of Fe-Cr-Ni alloy at 1073K in dry and humid environments
title_full_unstemmed	Observation on void formed in oxide scale of Fe-Cr-Ni alloy at 1073K in dry and humid environments
title_sort	observation on void formed in oxide scale of fe-cr-ni alloy at 1073k in dry and humid environments
publishDate	2011
url	http://irep.iium.edu.my/4128/ http://irep.iium.edu.my/4128/ http://irep.iium.edu.my/4128/1/Observation_on_Void_Formed_in_Oxide_Scale_of_Fe-Cr-Ni_Alloy_at_1073_K_in_Dry_and_Humid_Environments.pdf
first_indexed	2023-09-18T20:12:14Z
last_indexed	2023-09-18T20:12:14Z
_version_	1777407554677112832

Observation on void formed in oxide scale of Fe-Cr-Ni alloy at 1073K in dry and humid environments

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