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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محفوظ في:
التفاصيل البيبلوغرافية
المؤلف الرئيسي: Razali, Muhammad Fauzinizam
التنسيق: أطروحة
اللغة:English
منشور في: 2013
الموضوعات:
الوصول للمادة أونلاين:http://eprints.usm.my/46066/1/Muhammad%20Fauzinizam%20Bin%20Razali.pdf
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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
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