Mechanical behaviour and damping properties of Ni modified Cu–Zn–Al shape memory alloys

Alaneme, Kenneth Kanayo; Umar, Shaibu

doi:10.1016/j.jsamd.2018.05.002

Cited by 18 publications

(18 citation statements)

References 22 publications

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“…The results suggest that the damping characteristics at a frequency of 1 Hz are marginally higher than those obtained at a frequency of 2 Hz with the variance becoming pronounced with increasing damping temperature. This report agrees with the observations of Alaneme et al [9] where it is stated that more energy is dissipated at lower frequencies due to the characteristic irregular reciprocating motion prevalent at low damping frequency. This accounts for the marginal decrease in damping capacity as the frequency increased from 1 Hz to 2 Hz.…”

Section: Effect Of Quenching Treatments On the Storage Modulus Loss M...supporting

confidence: 92%

“…E′ is an important consideration when designing against structural instability such as the springback effect which involves dimensional alteration caused by residual stresses [41]. The loss modulus (E″) is proportional to the mechanical energy dissipated in the form of heat under static and dynamic loading conditions [9]. The ratio of energy dissipated by heat per cycle to mechanical energy absorbed or stored in the material subjected to stress is known as the damping capacity (tan δ) of the material [42].…”

Section: Damping Testmentioning

confidence: 99%

“…The damping capacity of materials is considered a critical factor in materials selection, especially in structural applications where dynamic loads are inevitable [6,7]. Damping capacity is a material property that measures the capacity of the material to absorb elastic strain energy induced by mechanical vibration [8,9]. Damping may occur as structural damping or due to internal friction in the material [10].…”

Section: Introductionmentioning

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 Quenching Treatments On the Storage Modulus Loss M...supporting

confidence: 92%

Section: Damping Testmentioning

confidence: 99%

Section: Introductionmentioning

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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“…Al-Mg-Si alloy with composition (Al-0.43Si--0.42Mg-0.1Fe-0.11Cu-0.02Mn-0.01Zn) was selected as composite matrix, while Cu-18Zn-7Al-0.3Ni based SMA developed from a previous study (Alaneme and Umar, 2018) was selected as reinforcement. The CuZnAlNi SMA was milled to average particle size of 30 µm using a conventional planetary ball mill, to have the same particle size range with SiC particles which were used to develop the AMC composition that served as control sample.…”

Section: Methodsmentioning

confidence: 99%

Comportamiento del flujo de esfuerzo y análisis microestructural de compuestos de matriz de aluminio deformados en caliente y reforzados con partículas de la aleación con memoria de forma CuZnAlNi

et al. 2020

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Se investigó el comportamiento del flujo de esfuerzo por compresión y las microestructuras de los compuestos de matriz de aleación de Al deformada en caliente (AMC) y reforzados con partículas de la aleación con memoria de forma (SMA) basadas en CuZnAlNi. La aleación base Al-Mg-Si reforzada con 4, 6 y 8% en peso de Cu-18Zn-7Al-0,3Ni, y 8% en peso de partículas de SiC, se obtuvieron mediante agitación doble y se sometieron a pruebas de compresión en caliente a una velocidad de deformación de 1,0 s−1, temperatura de 400 °C, y ~60% de deformación global constante, para ello se utilizó un simulador termo-mecánico Gleeble 3500. Las microestructuras iniciales y deformadas de los compuestos se examinaron utilizando microscopía óptica. El uso de partículas Cu-18Zn-7Al-0,3Ni como refuerzo dio como resultado el desarrollo de una estructura de matriz más fina en comparación con el SiC. La tensión de flujo y la dureza de los AMC reforzados con partículas de Cu-18Zn-7Al-0,3Ni fueron generalmente más altos que los de la aleación de Al no reforzada y la aleación de Al reforzada con SiC. También la tensión de flujo y, en gran medida, la dureza creció con el aumento en el porcentaje en peso de partículas de Cu-18Zn-7Al-0,3Ni en el AMC. La mejora observada con el uso de partículas de la aleación Cu-18Zn-7Al-0,3Ni se atribuyó a la combinación del refuerzo mejorado y el refinamiento del tamaño grano de la matriz, fortalecimiento la interface, el esfuerzo residual de compresión, la alta conductividad térmica, y la capacidad de amortiguación ofrecida por la aleación Cu-18Zn-7Al-0,3Ni.

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“…Although the martensitic transformation has the most significant impact on the functional properties of alloys, other microstructural defects such as dislocations, vacancies, etc. can cause significant changes [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Heat Treatment on Damping Capacity and Mechanical Properties of CuAlNi Shape Memory Alloy

et al. 2022

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This paper discusses the effect of different heat treatment procedures on the microstructural characteristics, damping capacities, and mechanical properties of CuAlNi shape memory alloys (SMA). The investigation was performed on samples in the as-cast state and heat treated states (solution annealing at 885 °C/60’/H2O and after tempering at 300 °C/60’/H2O). The microstructure of the samples was examined by light microscopy (LM) and scanning electron microscopy (SEM) equipped with a device for energy dispersive spectrometry (EDS) analysis. Light and scanning electron microscopy showed martensitic microstructure in all investigated samples. However, the changes in microstructure due to heat treatment by the presence of two types of martensite phases (β1’ and γ1’) influenced alloy damping and mechanical properties by enhancing alloy damping characteristics. Heat treatment procedure reduced the alloys’ mechanical properties and increased hardness of the alloy. Fractographic analysis of the alloy showed a transgranular type of fracture in samples after casting. After solution annealing, two types of fracture mechanisms can be noticed, transgranular and intergranular, while in tempered samples, mostly an intergranular type of fracture exists.

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Mechanical behaviour and damping properties of Ni modified Cu–Zn–Al shape memory alloys

Cited by 18 publications

References 22 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

Comportamiento del flujo de esfuerzo y análisis microestructural de compuestos de matriz de aluminio deformados en caliente y reforzados con partículas de la aleación con memoria de forma CuZnAlNi

The Effect of Heat Treatment on Damping Capacity and Mechanical Properties of CuAlNi Shape Memory Alloy

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