Characterization Of Oil Retrogression Of Aluminum Alloy 7075

Aluminum alloy 7075 is a useful industrial material thanks to its high strength to weight ratio. However, it is susceptible to corrosion due to numerous constituent particles with various electrochemical potentials the combination of which leads to susceptibility to corrosion. This issue was solved...

Full description

Saved in:

Bibliographic Details
Main Author:	Ng, Guan Yao
Format:	Thesis
Language:	English English
Published:	2014
Subjects:	T Technology (General)
Online Access:	http://eprints.utem.edu.my/id/eprint/16808/1/Characterization%20Of%20Oil%20Retrogression%20Of%20Aluminum%20Alloy%207075.pdf http://eprints.utem.edu.my/id/eprint/16808/2/Characterization%20of%20oil%20retrogression%20of%20aluminum%20alloy%207075.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utem-ep.16808
record_format	uketd_dc
spelling	my-utem-ep.168082022-09-08T11:45:40Z Characterization Of Oil Retrogression Of Aluminum Alloy 7075 2014 Ng, Guan Yao T Technology (General) TA Engineering (General). Civil engineering (General) Aluminum alloy 7075 is a useful industrial material thanks to its high strength to weight ratio. However, it is susceptible to corrosion due to numerous constituent particles with various electrochemical potentials the combination of which leads to susceptibility to corrosion. This issue was solved by using overage treatment with the penalty of 10-15% of peak strength. Previous research found that retrogression and re-aging (RRA) heat treatment improves corrosion resistance while maintaining the strength of the alloy. In this research, the retrogression process was studied to a greater extend with oil as the heating medium in relation to the standard retrogression. The tensile specimens are peak aged before retrogressed at 165oC, 185oC, and 205oC for 10 and 30 minutes in oil and standard furnace followed by re-aging at 120oC for 24 hours. Next, the specimens were put through tensile test, hardness test, Tafel DC corrosion test, and microstructure characterization by using Scanning Electron Microscope (SEM). The result of the analysis showed the mechanical properties of the alloy to decrease with increasing retrogression temperature and time for both oil and standard retrogression due to the increase in incoherent ɳ phase volume fraction as observed under the SEM analysis. In comparison between oil and standard retrogression, oil retrogression out-performed standard retrogression at 165 °C for 10 minutes with better corrosion resistance at corrosion current density of 6.64 μA/cm2 and tensile strength of 632.73 MPa. 2014 Thesis http://eprints.utem.edu.my/id/eprint/16808/ http://eprints.utem.edu.my/id/eprint/16808/1/Characterization%20Of%20Oil%20Retrogression%20Of%20Aluminum%20Alloy%207075.pdf text en public http://eprints.utem.edu.my/id/eprint/16808/2/Characterization%20of%20oil%20retrogression%20of%20aluminum%20alloy%207075.pdf text en validuser https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=96004 mphil masters Universiti Teknikal Malaysia Melaka. Faculty Of Manufacturing Engineering Abd Rashid, Mohd Warikh
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
advisor	Abd Rashid, Mohd Warikh
topic	T Technology (General) T Technology (General)
spellingShingle	T Technology (General) T Technology (General) Ng, Guan Yao Characterization Of Oil Retrogression Of Aluminum Alloy 7075
description	Aluminum alloy 7075 is a useful industrial material thanks to its high strength to weight ratio. However, it is susceptible to corrosion due to numerous constituent particles with various electrochemical potentials the combination of which leads to susceptibility to corrosion. This issue was solved by using overage treatment with the penalty of 10-15% of peak strength. Previous research found that retrogression and re-aging (RRA) heat treatment improves corrosion resistance while maintaining the strength of the alloy. In this research, the retrogression process was studied to a greater extend with oil as the heating medium in relation to the standard retrogression. The tensile specimens are peak aged before retrogressed at 165oC, 185oC, and 205oC for 10 and 30 minutes in oil and standard furnace followed by re-aging at 120oC for 24 hours. Next, the specimens were put through tensile test, hardness test, Tafel DC corrosion test, and microstructure characterization by using Scanning Electron Microscope (SEM). The result of the analysis showed the mechanical properties of the alloy to decrease with increasing retrogression temperature and time for both oil and standard retrogression due to the increase in incoherent ɳ phase volume fraction as observed under the SEM analysis. In comparison between oil and standard retrogression, oil retrogression out-performed standard retrogression at 165 °C for 10 minutes with better corrosion resistance at corrosion current density of 6.64 μA/cm2 and tensile strength of 632.73 MPa.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Ng, Guan Yao
author_facet	Ng, Guan Yao
author_sort	Ng, Guan Yao
title	Characterization Of Oil Retrogression Of Aluminum Alloy 7075
title_short	Characterization Of Oil Retrogression Of Aluminum Alloy 7075
title_full	Characterization Of Oil Retrogression Of Aluminum Alloy 7075
title_fullStr	Characterization Of Oil Retrogression Of Aluminum Alloy 7075
title_full_unstemmed	Characterization Of Oil Retrogression Of Aluminum Alloy 7075
title_sort	characterization of oil retrogression of aluminum alloy 7075
granting_institution	Universiti Teknikal Malaysia Melaka.
granting_department	Faculty Of Manufacturing Engineering
publishDate	2014
url	http://eprints.utem.edu.my/id/eprint/16808/1/Characterization%20Of%20Oil%20Retrogression%20Of%20Aluminum%20Alloy%207075.pdf http://eprints.utem.edu.my/id/eprint/16808/2/Characterization%20of%20oil%20retrogression%20of%20aluminum%20alloy%207075.pdf
_version_	1747833893538496512

Characterization Of Oil Retrogression Of Aluminum Alloy 7075

Similar Items