The effects of substituting Sn for Ni on the thermal and some other characteristics of NiTiSn shape memory alloys

Qader, İbrahim Nazem; Kök, Mediha; Cirak, Zehra Deniz

doi:10.1007/s10973-020-09758-w

Cited by 31 publications

(9 citation statements)

References 48 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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“…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%

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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“…SMAs have two main phases which are austenite and martensite phases. Austenite is stable at high temperatures while martensite is stable at low temperatures, and the phase transformation from austenite to martensite and vice versa can be obtained through the heating/cooling process [8][9][10][11][12][13][14][15][16][17][18][19][20]. Also, the ability of SMAs to return to their previous shape is specified into two different categories, which are shape memory effect (SME) and superelasticity (SE).…”

Section: Introductionmentioning

confidence: 99%

A Review Study on Biocompatible Improvements of NiTi-based Shape Memory Alloys

Mohammed

Kök

Qader

et al. 2021

International Journal of Innovative Engineering Applications

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Review paperNiTi-based shape memory alloys (SMAs) have many applications, especially for implantation, however since they are not a passive material so it is important to investigate them from different biocompatible perspectives. In this study, we introduced the important physical characteristics of NiTi alloys, then we explained different biocompatible terminologies, including carcinogenic, genotoxic, cytotoxicity, mutagenic, allergic, and corrosivity. We collected some important previous works that investigated the biocompatibility of NiTi-based SMAs and the different techniques used for improving the alloy and diminishing the hazard due to Ni-leakages.

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The effects of substituting Sn for Ni on the thermal and some other characteristics of NiTiSn shape memory alloys

Cited by 31 publications

References 48 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

The Effect of Different Parameters on Shape Memory Alloys

A Review Study on Biocompatible Improvements of NiTi-based Shape Memory Alloys

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