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Mechanical Properties Of Porous NiTi Shape Memory Alloy

Shape memory Alloy (SMA) is one type of alloy that is very unique for its ability on returning to initial shape. SMA can remember the shape or pattern after the alloy undergo plastic deformation. Even if the alloy experience the stimuli that made the alloy to change its shape, it will return back to...

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Main Author: Wong, Pei Wen
Format: Monograph
Language:English
Published: Universiti Sains Malaysia 2022
Subjects:
T Technology
TJ Mechanical engineering and machinery
Online Access:http://eprints.usm.my/55485/1/Mechanical%20Properties%20Of%20Porous%20NiTi%20Shape%20Memory%20Alloy_Wong%20Pei%20Wen.pdf
http://eprints.usm.my/55485/
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spelling my.usm.eprints.55485 http://eprints.usm.my/55485/ Mechanical Properties Of Porous NiTi Shape Memory Alloy Wong, Pei Wen T Technology TJ Mechanical engineering and machinery Shape memory Alloy (SMA) is one type of alloy that is very unique for its ability on returning to initial shape. SMA can remember the shape or pattern after the alloy undergo plastic deformation. Even if the alloy experience the stimuli that made the alloy to change its shape, it will return back to the shape or pattern after the stimuli ends. These phenomenon is known as shape memory effect (SME). Many studies found that NiTi SMA shows a great utility in biomedical field and it can be used on implantation. However, there is a problem that the current material may have mismatch in elastic modulus between the human bone and metallic material which causes stress shielding to occur and leads to bone resorption. The solution for this problem to make porous structure inside the material to improve its strength. Hence, the effect of pore forming agent, CaH2 on the mechanical properties of porous NiTi SMA fabricated using powder metallurgy method with the addition of different weight percentage of CaH2. The samples then undergo characterization and compression testing to analyse the samples’ properties. Result show that the increasing of weight percentage of CaH2 increase the pore size in sample and also decrease the sample density while increase its porosity. Increasing in CaH2 will also affect the austenite and martensite transformation temperatures and enthalpy changes of reactions. The compressive stress and Young Modulus decreases as the CaH2 increases in samples. In the aspect of biomedical application, thcompressive stress and Young’s Modulus recorded in all samples can meet the demand for biomedical implantation as the samples satisfied within the range of the reference value of human bones like cancellous and cortical bone. Universiti Sains Malaysia 2022-07-01 Monograph NonPeerReviewed application/pdf en http://eprints.usm.my/55485/1/Mechanical%20Properties%20Of%20Porous%20NiTi%20Shape%20Memory%20Alloy_Wong%20Pei%20Wen.pdf Wong, Pei Wen (2022) Mechanical Properties Of Porous NiTi Shape Memory Alloy. Project Report. Universiti Sains Malaysia, Pusat Pengajian Kejuruteraan Mekanikal. (Submitted)
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
language English
topic T Technology
TJ Mechanical engineering and machinery
spellingShingle T Technology
TJ Mechanical engineering and machinery
Wong, Pei Wen
Mechanical Properties Of Porous NiTi Shape Memory Alloy
description Shape memory Alloy (SMA) is one type of alloy that is very unique for its ability on returning to initial shape. SMA can remember the shape or pattern after the alloy undergo plastic deformation. Even if the alloy experience the stimuli that made the alloy to change its shape, it will return back to the shape or pattern after the stimuli ends. These phenomenon is known as shape memory effect (SME). Many studies found that NiTi SMA shows a great utility in biomedical field and it can be used on implantation. However, there is a problem that the current material may have mismatch in elastic modulus between the human bone and metallic material which causes stress shielding to occur and leads to bone resorption. The solution for this problem to make porous structure inside the material to improve its strength. Hence, the effect of pore forming agent, CaH2 on the mechanical properties of porous NiTi SMA fabricated using powder metallurgy method with the addition of different weight percentage of CaH2. The samples then undergo characterization and compression testing to analyse the samples’ properties. Result show that the increasing of weight percentage of CaH2 increase the pore size in sample and also decrease the sample density while increase its porosity. Increasing in CaH2 will also affect the austenite and martensite transformation temperatures and enthalpy changes of reactions. The compressive stress and Young Modulus decreases as the CaH2 increases in samples. In the aspect of biomedical application, thcompressive stress and Young’s Modulus recorded in all samples can meet the demand for biomedical implantation as the samples satisfied within the range of the reference value of human bones like cancellous and cortical bone.
format Monograph
author Wong, Pei Wen
author_facet Wong, Pei Wen
author_sort Wong, Pei Wen
title Mechanical Properties Of Porous NiTi Shape Memory Alloy
title_short Mechanical Properties Of Porous NiTi Shape Memory Alloy
title_full Mechanical Properties Of Porous NiTi Shape Memory Alloy
title_fullStr Mechanical Properties Of Porous NiTi Shape Memory Alloy
title_full_unstemmed Mechanical Properties Of Porous NiTi Shape Memory Alloy
title_sort mechanical properties of porous niti shape memory alloy
publisher Universiti Sains Malaysia
publishDate 2022
url http://eprints.usm.my/55485/1/Mechanical%20Properties%20Of%20Porous%20NiTi%20Shape%20Memory%20Alloy_Wong%20Pei%20Wen.pdf
http://eprints.usm.my/55485/
_version_ 1748703967902171136
score 13.211869

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