Gradient Ageing Of Ni-Rich Niti Shape Memory Alloy

To date, the shape memory behaviour are limited only for discrete action application leaving no option for any progressive or intermediate state of control. The creation of gradient plateau is one of the best solutions and it is possible by many ways, and one of it is by microstructure modification...

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Main Author:	Razali, Muhammad Fauzinizam
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TJ1 Mechanical engineering and machinery
Online Access:	http://eprints.usm.my/46066/1/Muhammad%20Fauzinizam%20Bin%20Razali.pdf
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id	my-usm-ep.46066
record_format	uketd_dc
spelling	my-usm-ep.460662020-02-03T03:15:48Z Gradient Ageing Of Ni-Rich Niti Shape Memory Alloy 2013-09 Razali, Muhammad Fauzinizam TJ1 Mechanical engineering and machinery To date, the shape memory behaviour are limited only for discrete action application leaving no option for any progressive or intermediate state of control. The creation of gradient plateau is one of the best solutions and it is possible by many ways, and one of it is by microstructure modification via heat treatment that includes annealing and ageing. The purpose of this study is to create a functionally graded NiTi wire with an optimum pseudoelastic behaviour through a gradient ageing treatment. This approach is based on the sensitivity of the alloys’ thermomechanical properties with respect to temperature and duration of ageing treatment. The experimental works are divided into two stages. The first stage involved the study of the effect of temperature and duration of isothermal ageing on thermal and deformation behaviour of NiTi shape memory alloys. Due to the heterogeneous precipitate distribution, prolonged ageing led to the gradient deformation on the isothermal aged specimen with respect to gradual variation of Ni composition within the alloy matrix. The result shows that the stress plateau of the phase transformation exhibits positive stress gradient with a value of 3.4 GPa. 2013-09 Thesis http://eprints.usm.my/46066/ http://eprints.usm.my/46066/1/Muhammad%20Fauzinizam%20Bin%20Razali.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Mekanikal
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TJ1 Mechanical engineering and machinery
spellingShingle	TJ1 Mechanical engineering and machinery Razali, Muhammad Fauzinizam Gradient Ageing Of Ni-Rich Niti Shape Memory Alloy
description	To date, the shape memory behaviour are limited only for discrete action application leaving no option for any progressive or intermediate state of control. The creation of gradient plateau is one of the best solutions and it is possible by many ways, and one of it is by microstructure modification via heat treatment that includes annealing and ageing. The purpose of this study is to create a functionally graded NiTi wire with an optimum pseudoelastic behaviour through a gradient ageing treatment. This approach is based on the sensitivity of the alloys’ thermomechanical properties with respect to temperature and duration of ageing treatment. The experimental works are divided into two stages. The first stage involved the study of the effect of temperature and duration of isothermal ageing on thermal and deformation behaviour of NiTi shape memory alloys. Due to the heterogeneous precipitate distribution, prolonged ageing led to the gradient deformation on the isothermal aged specimen with respect to gradual variation of Ni composition within the alloy matrix. The result shows that the stress plateau of the phase transformation exhibits positive stress gradient with a value of 3.4 GPa.
format	Thesis
qualification_level	Master's degree
author	Razali, Muhammad Fauzinizam
author_facet	Razali, Muhammad Fauzinizam
author_sort	Razali, Muhammad Fauzinizam
title	Gradient Ageing Of Ni-Rich Niti Shape Memory Alloy
title_short	Gradient Ageing Of Ni-Rich Niti Shape Memory Alloy
title_full	Gradient Ageing Of Ni-Rich Niti Shape Memory Alloy
title_fullStr	Gradient Ageing Of Ni-Rich Niti Shape Memory Alloy
title_full_unstemmed	Gradient Ageing Of Ni-Rich Niti Shape Memory Alloy
title_sort	gradient ageing of ni-rich niti shape memory alloy
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Mekanikal
publishDate	2013
url	http://eprints.usm.my/46066/1/Muhammad%20Fauzinizam%20Bin%20Razali.pdf
_version_	1747821603600728064

Gradient Ageing Of Ni-Rich Niti Shape Memory Alloy

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