Effect of quarterly element addition of cobalt on phase transformation characteristics of Cu-Al-Ni shape memory alloys
In the current study, a new type of Cu-based shape memory alloys with the function of shape memory effect was successfully produced with the introduction of high-purity Co precipitates between the phases of Cu-Al-Ni shape memory alloy. The microstructure, transformation characteristics, and mechanic...
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my.utm.583842022-04-20T07:35:36Z http://eprints.utm.my/id/eprint/58384/ Effect of quarterly element addition of cobalt on phase transformation characteristics of Cu-Al-Ni shape memory alloys Saud, Safaa Najah Abu Bakar, Tuty Asma Hamzah, Esah Ibrahim, Mustafa Khaleel Bahador, Abollah TJ Mechanical engineering and machinery In the current study, a new type of Cu-based shape memory alloys with the function of shape memory effect was successfully produced with the introduction of high-purity Co precipitates between the phases of Cu-Al-Ni shape memory alloy. The microstructure, transformation characteristics, and mechanical properties were systematically investigated by means of differential scanning calorimetry, field emission scanning electron microscopy, energy dispersive spectroscopy (EDS), transmission electron microscopy, X-ray diffraction (XRD), a tensile test, a hardness test, and a shape memory effect test. The typical microstructures show that a new phase was formed, known as the γ2 phase, and the volume friction and the size of this phase were gradually increased with the increasing Co content. According to the results of the XRD and EDS, it was confirmed that the γ2 phase represents a compound of Al75Co22Ni3. However, the presence of γ2 phase in the modified alloys was found to result in an increase of the transformation temperatures in comparison with the unmodified alloy. Nevertheless, it was found that with 1 wt pct of Co addition, a maximum ductility of 7 pct was achieved, corresponding to an increase in the strain recovery by the shape memory effect to 95 pct with respect to the unmodified alloy of 50 pct. Springer Boston 2015-08-25 Article PeerReviewed Saud, Safaa Najah and Abu Bakar, Tuty Asma and Hamzah, Esah and Ibrahim, Mustafa Khaleel and Bahador, Abollah (2015) Effect of quarterly element addition of cobalt on phase transformation characteristics of Cu-Al-Ni shape memory alloys. Metallurgical And Materials Transactions A-Physical Metallurgy And Materials Science, 46 (8). pp. 3528-3542. ISSN 1073-5623 http://dx.doi.org/10.1007/s11661-015-2924-2 DOI:10.1007/s11661-015-2924-2 |
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TJ Mechanical engineering and machinery Saud, Safaa Najah Abu Bakar, Tuty Asma Hamzah, Esah Ibrahim, Mustafa Khaleel Bahador, Abollah Effect of quarterly element addition of cobalt on phase transformation characteristics of Cu-Al-Ni shape memory alloys |
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In the current study, a new type of Cu-based shape memory alloys with the function of shape memory effect was successfully produced with the introduction of high-purity Co precipitates between the phases of Cu-Al-Ni shape memory alloy. The microstructure, transformation characteristics, and mechanical properties were systematically investigated by means of differential scanning calorimetry, field emission scanning electron microscopy, energy dispersive spectroscopy (EDS), transmission electron microscopy, X-ray diffraction (XRD), a tensile test, a hardness test, and a shape memory effect test. The typical microstructures show that a new phase was formed, known as the γ2 phase, and the volume friction and the size of this phase were gradually increased with the increasing Co content. According to the results of the XRD and EDS, it was confirmed that the γ2 phase represents a compound of Al75Co22Ni3. However, the presence of γ2 phase in the modified alloys was found to result in an increase of the transformation temperatures in comparison with the unmodified alloy. Nevertheless, it was found that with 1 wt pct of Co addition, a maximum ductility of 7 pct was achieved, corresponding to an increase in the strain recovery by the shape memory effect to 95 pct with respect to the unmodified alloy of 50 pct. |
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Article |
author |
Saud, Safaa Najah Abu Bakar, Tuty Asma Hamzah, Esah Ibrahim, Mustafa Khaleel Bahador, Abollah |
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Saud, Safaa Najah Abu Bakar, Tuty Asma Hamzah, Esah Ibrahim, Mustafa Khaleel Bahador, Abollah |
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Saud, Safaa Najah |
title |
Effect of quarterly element addition of cobalt on phase transformation characteristics of Cu-Al-Ni shape memory alloys |
title_short |
Effect of quarterly element addition of cobalt on phase transformation characteristics of Cu-Al-Ni shape memory alloys |
title_full |
Effect of quarterly element addition of cobalt on phase transformation characteristics of Cu-Al-Ni shape memory alloys |
title_fullStr |
Effect of quarterly element addition of cobalt on phase transformation characteristics of Cu-Al-Ni shape memory alloys |
title_full_unstemmed |
Effect of quarterly element addition of cobalt on phase transformation characteristics of Cu-Al-Ni shape memory alloys |
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effect of quarterly element addition of cobalt on phase transformation characteristics of cu-al-ni shape memory alloys |
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Springer Boston |
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2015 |
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http://eprints.utm.my/id/eprint/58384/ http://dx.doi.org/10.1007/s11661-015-2924-2 |
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