Superelastic damping at nanoscale in ternary and quaternary Cu-based shape memory alloys

Gómez-Cortés, J.F.; Fuster, V.; Pérez-Cerrato, M.; Lorenzo, P.; Ruiz‐Larrea, I.; Bréczewski, T.; Nó, M.L.; Juan, J. San

doi:10.1016/j.jallcom.2021.160865

Cited by 16 publications

(3 citation statements)

References 76 publications

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“…This assertion is based on the damping capacity of the step-quenched B alloy (0.104 at test frequency of 1 Hz) which is superior than most Cu-based SMAs reported in literature that have been recommended for commercialization and applications in hydraulic couplings, connector pipes in pump systems and structural connectors (table 2). The findings from this study showed that Cu-Zn-Sn-Fe SMAs had higher damping capacity than that of quaternary Cu-Al-Ni-Be (0.072 ± 0.004) and Cu-Al-Ni-Ga (0.042 ± 0.002) SMA systems [49], and ternary Cu-Al-Mn (0.09) SMAs [21].…”

Section: Effect Of Varied Compositions On Damping Properties Of Cu-zn...mentioning

confidence: 60%

“…It has been reported in the literature that the high damping capacity of Cu-based shape memory alloys is attributed to their ability to dissipate energy emanating from the movement of variant interfaces [48,49]. The high damping capacity associated with the step-quenched samples of Cu-Zn-Sn-based SMAs may be linked to the marginal pinning effect of the precipitate phases and greater mobility of variant interfaces leading to high internal friction.…”

Section: Effect Of Up/step Quenching Treatments On Damping Mechanismsmentioning

confidence: 99%

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Dynamic mechanical damping analysis of up/step-quenched Cu-Zn-Sn-based shape memory alloys

Anaele,

Alaneme,

Omotoyinbo

2024

Mater. Res. Express

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The effect of thermal quenching procedures on the damping properties of Cu-Zn-Sn-based SMAs is reported. Three compositions of Cu-Zn-Sn-based SMAs designated A (Cu-15.6Zn-12.1Sn), B (Cu-26.1Zn-9.3Sn), and C (Cu-29.6Zn-8.9Sn) samples produced by the casting process were subjected to direct quenching, up-quenching, and step-quenching treatments. The microstructure of the samples was examined using the backscattered electron microscope with fixtures for energy-dispersive spectroscopy analysis. The damping properties were assessed on a dynamic mechanical analyzer and presented in terms of tan delta. The microstructures of Cu-Zn-Sn-based SMAs consist of γ-Cu5Zn8 and Cu4 major phases containing some black dot precipitation and a small amount of white circular precipitates in the parent phase. For the A alloys, the step-quenched samples exhibited the highest damping capacity with peak internal friction of 0.041 at 37℃, which is greater than 0.028 at 37℃ and 0.26 at 25℃ obtained for the up-quenched and direct-quenched samples respectively. The step-quenched B alloys show the highest damping capacity with peak internal friction of 0.104 at 227℃, which is far greater than 0.053 at 23℃ and 0.034 at 35℃ obtained for the up-quenched and direct-quenched samples respectively. For the C alloys, the up-quenched samples show the highest damping capacity with peak internal friction of 0.053 at 235℃, which is greater than the peak values of 0.037 at 238℃ obtained for the step-quenched samples. Direct-quenched samples gave the lowest damping capacity with a peak value of 0.027 at 235℃. In general, step-quenching treatment effectively improved the damping properties of Cu-Zn-Sn-based SMAs.

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Section: Effect Of Varied Compositions On Damping Properties Of Cu-zn...mentioning

confidence: 60%

Section: Effect Of Up/step Quenching Treatments On Damping Mechanismsmentioning

confidence: 99%

Dynamic mechanical damping analysis of up/step-quenched Cu-Zn-Sn-based shape memory alloys

Anaele,

Alaneme,

Omotoyinbo

2024

Mater. Res. Express

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“…The most commercially used SMAs are the expensive NiTi alloys [2,[10][11][12] due to their superior shape memory effect (SME) and superelasticity (SE) properties. However, copper-based SMAs [13][14][15][16][17][18][19] have the potential to be the closest alternatives to NiTi SMAs due to their good shape recovery, ease of fabrication, and excellent conductivity of heat and electricity [20]. But, Cu-based SMAs also suffer from some flaws such as brittleness stemming from their coarse grains, thermal instabilities, martensite stabilization, and weak mechanical properties [4,20].…”

Section: Introductionmentioning

confidence: 99%

Hysteresis gap-shrinking and structural effects of minor Al and Ti modifications on binary CuAl-based high-temperature shape memory alloys

Karaduman,

Özkul,

Aksu Canbay

2024

Phys. Scr.

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Cu-based shape memory alloys (SMAs), except for exhibiting shape recovery, superelasticity, and high damping, are desirable because these smart materials have higher electrical and thermal conductivity and much lower prices than NiTi SMAs. However, they also have some downsides in mechanical strength and brittleness (mostly stemming from their coarse grain structure) and thermal instability. Therefore, adding some grain refining elements to these SMAs to improve their shape memory effect (SME), and thermal, structural, and mechanical properties is a widespread and simple way that significantly affects their martensitic phase transitions, structure, and mechanical properties. One of these grain-refining elements is titanium. Its thermal conductivity is lower than those of Cu and Al elements and has a low solubility in Cu-matrix. Besides the effects of small Al variations, the use of minor amounts of titanium in binary CuAl-base alloys can show impressive effects on all characteristics of these shape memory alloys, such as shape memory effect properties, martensitic transformation kinetics parameters, and microstructural features. In this research work, CuAlTi ternary high-temperature shape memory alloys (HTSMAs) with new compositions were produced by the arc melting method without a complicating use of Mn or Ni components in usual ternary CuAlMn and CuAlNi shape memory alloys. Thermal analyses of the prepared samples of the alloys were investigated by using differential scanning calorimetry (DSC) and differential thermal analysis (DTA) measurements. In contrast, X-ray diffraction (XRD) test results and optical micrographs were used for analyzing the structure of the alloy samples. The effect of different amounts of low soluble and grain refining Ti element on the binary CuAl alloy system was investigated.

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Elevated Temperature Deformation Behavior of Novel NiTiAg Shape Memory Alloys: A Comparison Between Various Constitutive Models and Experimental Flow Curves

Santosh,

Sampath,

Mouliswar

2024

J. of Materi Eng and Perform

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Superelastic damping at nanoscale in ternary and quaternary Cu-based shape memory alloys

Cited by 16 publications

References 76 publications

Dynamic mechanical damping analysis of up/step-quenched Cu-Zn-Sn-based shape memory alloys

Dynamic mechanical damping analysis of up/step-quenched Cu-Zn-Sn-based shape memory alloys

Hysteresis gap-shrinking and structural effects of minor Al and Ti modifications on binary CuAl-based high-temperature shape memory alloys

Elevated Temperature Deformation Behavior of Novel NiTiAg Shape Memory Alloys: A Comparison Between Various Constitutive Models and Experimental Flow Curves

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