The Influence of Time-Dependent Aging Process on the Thermodynamic Parameters and Microstructures of Quaternary Cu79–Al12–Ni4–Nb5 (wt%) Shape Memory Alloy

Qader, İbrahim Nazem; Ercan, Ercan; Faraj, Bahar Ali Mohammed; Kök, Mediha; Dağdelen, Fethi; Aydoğdu, Y.

doi:10.1007/s40995-020-00876-6

Cited by 26 publications

(11 citation statements)

References 28 publications

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“…Gibbs Free energy of an SMA throughout martensitic phase transformation may be a combination of changing some parameters of physical of the alloys [38]. It can be calculated by [39][40][41]:…”

Section: Resultsmentioning

confidence: 99%

Quaternary Element Incorporation Effects on Thermal Properties and Crystal-Micro Structure of Cu-Al-Fe High Temperature Shape Memory Alloys

Balci

Akpınar

2021

International Journal of Thermodynamics

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Recently, researchers have shown an increased interest in Cu-based shape memory alloys due to their special characteristics, which can be used in high-temperature applications. In this study, ternary shape memory alloys in the form of CuAlFe with different ratios of iron and quaternary CuAlFe alloys containing Ni, Mn, and Ti were produced by arc melting. Then the produced alloys were kept at 900 ℃ for 24 hours to make sure that all constituents in the alloys were homogeneously distributed. The change in the transformation temperatures for all samples was checked out by Differential Scanning Calorimetry (DSC). Also, the change in the crystal structure and microstructure were determined by x-ray diffractometer (XRD) and scanning electron microscopy (SEM), respectively. The aim of this study is to compare the thermal and microstructural properties of quaternary alloys formed by adding Ni, Mn, and Ti elements to CuAlFe-based shape memory alloy with different rates, which is not available in the literature. The result of this study; although the electron concentration value increased, a significant decrease was observed in the values of the transformation temperatures. Increasing Fe-element decreased the transformation temperature non-linearly. Ni and Mn contents added to CuAlFe shape memory alloys have reduced transformation temperatures, such as Af and Mf. The XRD and SEM-EDX measurements showed the martensite phase with some produced compound precipitated in the matrix phase.

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Section: Resultsmentioning

confidence: 99%

Quaternary Element Incorporation Effects on Thermal Properties and Crystal-Micro Structure of Cu-Al-Fe High Temperature Shape Memory Alloys

Balci

Akpınar

2021

International Journal of Thermodynamics

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“…There are also many engineer types such as piezoelectric materials [37] that are used in a robotic and ultrasound generator, moreover, they are used for power generating sidewalks [38]. Another type is shape memory alloys (SMAs) that their properties have been improved for Cu-based SMAs [39][40][41][42][43][44][45], NiTi-based SMAs [46][47][48][49][50][51][52][53][54], and Fe-based SMAs [55][56][57]. The aforementioned materials can be used for smart systems that generate clean energies.…”

Section: Materials Science Multidisciplinarymentioning

confidence: 99%

Recent Improvements in Renewable Energies and their effects on the Environment and the Economy: Review Article

Kanca¹,

Qader²,

Qadir³

et al. 2021

El-Cezeri Fen Ve Mühendislik Dergisi

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The increasing populations and expanding industries all over the world led to enhance the need for energy. Since most of the nowadays energies are generated by fossil fuels, so the ratio of greenhouse gases like CO 2 extremely increased that impacted the environment and other sectors. In this study, the renewable energies used globally and in Turkey have been described. Also, the different fields of studies, which covered by different researchers have been highlighted. Besides, the opportunity and the corresponding advantages that can be achieved by harnessing renewable energies have been determined. Consequently, there is good progress in development, and investments have been made in this area, especially by governments, international organizations, and highly advanced and large private companies. Finally, this article provides a detailed review by collecting and examining a variety of renewable energy sources and highlighting prospects for scientists and investors.

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“…The phase transformation temperatures are austenite start, austenite finish, martensite start, martensite finish and martensite transformation temperature by deformation (i.e. maximum temperature at which martensite transformation occurs) Temperatures that are symbolized as As, Af, Ms, Mf, and Md, respectively [17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Shape Memory Alloysmentioning

confidence: 99%

“…Aging is a thermal process, where a specimen is taken in a particular temperature for a determined time [28]. A convenient furnace need for heating up a SMA.…”

Section: Agingmentioning

confidence: 99%

The Effect of Different Parameters on Shape Memory Alloys

Qader

Kök

Dağdelen

et al. 2020

Sakarya University Journal of Science

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Shape memory alloys' characteristics are different from ordinary materials because they can memorize their predetermined shape, thus they are excellent candidates for different applications. In this review article, the most interesting parameters that researchers are using in their investigation have been highlighted. Also, the popular techniques used for the characterization of shape memory alloys have been described. The diagrams and sketches can show a clear view of metallurgies and related research areas.

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The Influence of Time-Dependent Aging Process on the Thermodynamic Parameters and Microstructures of Quaternary Cu79–Al12–Ni4–Nb5 (wt%) Shape Memory Alloy

Cited by 26 publications

References 28 publications

Quaternary Element Incorporation Effects on Thermal Properties and Crystal-Micro Structure of Cu-Al-Fe High Temperature Shape Memory Alloys

Quaternary Element Incorporation Effects on Thermal Properties and Crystal-Micro Structure of Cu-Al-Fe High Temperature Shape Memory Alloys

Recent Improvements in Renewable Energies and their effects on the Environment and the Economy: Review Article

The Effect of Different Parameters on Shape Memory Alloys

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