Multiaxial Fatigue Behaviour Of Heat Treated 6061 Aluminium Alloy

This study is devoted to investigate the response of solid and thin-walled tubular specimen made of as-received and heat treated into T4 and T6 6061 aluminium alloy subjected to axial (tension-tension), torsional and axial torsional low cycle fatigue. 6061 aluminium alloys have been widely used as a...

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Main Author:	Marno, Marini
Format:	Thesis
Language:	English
Published:	2011
Subjects:	TA404 Composite materials
Online Access:	http://eprints.usm.my/36941/1/MARINI_BT_MARNO_24_Pages.pdf
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id	my-usm-ep.36941
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spelling	my-usm-ep.369412019-04-12T05:26:44Z Multiaxial Fatigue Behaviour Of Heat Treated 6061 Aluminium Alloy 2011 Marno, Marini TA404 Composite materials This study is devoted to investigate the response of solid and thin-walled tubular specimen made of as-received and heat treated into T4 and T6 6061 aluminium alloy subjected to axial (tension-tension), torsional and axial torsional low cycle fatigue. 6061 aluminium alloys have been widely used as a candidate material in aerospace, automobile, aircraft and structural application because of their superior mechanical properties such as high strength to weight ratio and good ductility. In this investigation, the response and behaviour of this alloy to the cyclic loading were studied using cyclic stress response and cyclic stress strain curve shows that this alloy exhibits cyclic hardening. The geometry of the hysteresis loops is also being analyzed in order to evaluate the softening and hardening effect. The effects of heat treatment on the fatigue life and behaviour where T6 condition depict higher fatigue life are discussed. The differences in fatigue behaviours and cyclic deformation between solid and round specimens where a stress gradient exist, and thin-walled tubular specimens where a uniform stress state is assumed are also discussed. Fatigue life of the specimens were recorded and presented in the S-N curve and shows that heat treated T6 alloy exhibits higher fatigue life and fatigue strength compared to the as-received and T4 alloy regardless the type of cyclic loading applied. Cracks initiate on the maximum shear plane and then start to propagate depending on the type of cyclic loading that were applied to the specimens. Through fractographic analysis, shallow striations and various sizes of dimples and voids are observed during the crack propagation while the final overload region exhibits dimples rupture. 2011 Thesis http://eprints.usm.my/36941/ http://eprints.usm.my/36941/1/MARINI_BT_MARNO_24_Pages.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TA404 Composite materials
spellingShingle	TA404 Composite materials Marno, Marini Multiaxial Fatigue Behaviour Of Heat Treated 6061 Aluminium Alloy
description	This study is devoted to investigate the response of solid and thin-walled tubular specimen made of as-received and heat treated into T4 and T6 6061 aluminium alloy subjected to axial (tension-tension), torsional and axial torsional low cycle fatigue. 6061 aluminium alloys have been widely used as a candidate material in aerospace, automobile, aircraft and structural application because of their superior mechanical properties such as high strength to weight ratio and good ductility. In this investigation, the response and behaviour of this alloy to the cyclic loading were studied using cyclic stress response and cyclic stress strain curve shows that this alloy exhibits cyclic hardening. The geometry of the hysteresis loops is also being analyzed in order to evaluate the softening and hardening effect. The effects of heat treatment on the fatigue life and behaviour where T6 condition depict higher fatigue life are discussed. The differences in fatigue behaviours and cyclic deformation between solid and round specimens where a stress gradient exist, and thin-walled tubular specimens where a uniform stress state is assumed are also discussed. Fatigue life of the specimens were recorded and presented in the S-N curve and shows that heat treated T6 alloy exhibits higher fatigue life and fatigue strength compared to the as-received and T4 alloy regardless the type of cyclic loading applied. Cracks initiate on the maximum shear plane and then start to propagate depending on the type of cyclic loading that were applied to the specimens. Through fractographic analysis, shallow striations and various sizes of dimples and voids are observed during the crack propagation while the final overload region exhibits dimples rupture.
format	Thesis
qualification_level	Master's degree
author	Marno, Marini
author_facet	Marno, Marini
author_sort	Marno, Marini
title	Multiaxial Fatigue Behaviour Of Heat Treated 6061 Aluminium Alloy
title_short	Multiaxial Fatigue Behaviour Of Heat Treated 6061 Aluminium Alloy
title_full	Multiaxial Fatigue Behaviour Of Heat Treated 6061 Aluminium Alloy
title_fullStr	Multiaxial Fatigue Behaviour Of Heat Treated 6061 Aluminium Alloy
title_full_unstemmed	Multiaxial Fatigue Behaviour Of Heat Treated 6061 Aluminium Alloy
title_sort	multiaxial fatigue behaviour of heat treated 6061 aluminium alloy
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
publishDate	2011
url	http://eprints.usm.my/36941/1/MARINI_BT_MARNO_24_Pages.pdf
_version_	1747820652412272640

Multiaxial Fatigue Behaviour Of Heat Treated 6061 Aluminium Alloy

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