Ageing Behaviour of Sc-Doped Cu–Zn–Al Shape Memory Alloys

Saha, Gourab; Ghosh, Manojit; Antony, A. Godwin; Biswas, Koushik

doi:10.1007/s13369-018-3621-4

Cited by 11 publications

(8 citation statements)

References 31 publications

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“…Namun, paduan Cu-Zn-Al juga memiliki kelemahan dimana paduan tersebut sulit untuk mengontrol komposisi kimia yang akurat dalam peleburan dan ketahanan lelah yang rendah sebagai akibat dari retak interkristalin [5]. Untuk mengatasi masalah ini, maka dilakukan penelitian dengan proses perlakuan panas yang efisien atau lebih dikenal dengan istilah artifical aging.…”

Section: Pendahuluanunclassified

Pengaruh waktu aging terhadap perubahan sifat fisik paduan ingat bentuk (shape memory alloy) Cu-Zn-Al

Josua

Budiarto²

2023

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Cu-Zn-Al alloy is a shape memory alloy (SMA) that is widely used due to its high transformation temperature. This study aimed to determine the effect of variations in aging time (1.3 and 5 hours) on physical changes (crystal structure and hardness) in Cu-Zn-Al alloys. The method used in this study is powder metallurgy by combining Cu, Zn, and Al powders. Followed by mixing them and then compacting the alloy. The alloy was sintered at 400°C and quenched at room temperature for 24 hours. Then the alloy was given various heat treatments (aging) for 1.3 and 5 hours at 200 °C. Microstructure and hardness tests were carried out on Cu-Zn-Al alloys to determine the properties of the alloy after being treated. From the test, it was found that the hardness value increased from 303 HBN to 375 HBN (1 hour), 351 HBN (3 hours), and 320 HBN (5 hours), and there was a change in crystal size, dislocation density, and lattice strain.

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Section: Pendahuluanunclassified

Pengaruh waktu aging terhadap perubahan sifat fisik paduan ingat bentuk (shape memory alloy) Cu-Zn-Al

Josua

Budiarto²

2023

Armatur

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“…The addition of Ce delayed the occurrence of dynamic recrystallization, resulting in significant improvement in the mechanical properties of the composites, as shown in Figure 7 [ 13 ]. Saha et al found that adding elemental Sc to Cu–Zn–Al shape-memory alloy can be an effective grain refiner to produce finer precipitates and improve the hardness of the alloy [ 32 ].…”

Section: Influence Mechanismmentioning

confidence: 99%

“…The results show that, due to the low solid-solubility of Y and Zr in Cu, the amount of precipitated Cu 5 Y and Cu 5 Zr phases increased by adding Y to refine the grains, and thus solid-solution enhancement of Cu–0.5Y–xZr alloy is realized [ 14 ]. Saha et al found that adding elemental Sc to Cu–Zn–Al shape-memory alloy can reduce the phase-transition temperature and thus improve the mobility of the martensite/austenite interface [ 32 ]. Sc-free components exhibit the well-known “martensitic stability” characteristic of alloys of the same class, attributed to reduced mobility of the martensitic–austenite interface.…”

Section: Influence Mechanismmentioning

confidence: 99%

“…Sc-free components exhibit the well-known “martensitic stability” characteristic of alloys of the same class, attributed to reduced mobility of the martensitic–austenite interface. However, the addition of Sc tracer significantly reduced the phase-transition temperature, indicating increased fluidity of the martensitic–austenite interface [ 32 ]. This reduces the degradation of shape-memory effects (SME) during repeated transformations at lower temperature ranges.…”

Section: Influence Mechanismmentioning

confidence: 99%

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Research Progress in Interfacial Characteristics and Strengthening Mechanisms of Rare Earth Metal Oxide-Reinforced Copper Matrix Composites

Jiang

2022

Materials

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The existence of a small amount of rare earth metal oxides (REMOs) can greatly affect the structure and function of copper matrix composites owing to improvement of surface and interface properties between REMOs and metal matrix, and there are still some challenges concerning interfaces and complex interfacial reactions. This review summarizes the interfacial characteristics and strengthening mechanisms of REMO-reinforced copper matrix composites, including fabrication methods for solving rare earth metal oxide-dispersion problems and characterization of the microstructure and properties of REMO-reinforced copper matrix composites. In particular, the strengthening effects of various rare earth metal oxide-reinforced copper matrix composites are systematically summarized. The interface characteristics of composites from a thermodynamics standpoint and the strengthening mechanism are emphatically investigated and discussed in order to help unveil design principles and to provide reference for future research of REMO-reinforced copper matrix composites.

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“…Shape memory alloys can be classified into the following groups according to the nature of the chemical elements found in their composition: Alloys based on Ni–Ti [ 2 , 7 , 8 , 9 ]; Copper-based alloys (Cu–Al–Zn, Cu–Al–Ni) [ 10 , 11 , 12 , 13 ]; Ferrous alloys (Fe–Mn, Fe–Ni–C) [ 14 , 15 , 16 , 17 , 18 , 19 ]; Noble alloys (Au–Cd, Ag–Cd) [ 20 , 21 , 22 ]; ”Exotic” alloys (In–Te, In–Cd, V–Nb, etc) [ 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. …”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Designs on Several Mechanical Properties of Cu–Al–Zn Shape Memory Alloys Used in the Processing Industry

et al. 2023

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By assimilating shape memory alloys with mathematical multifractal-type objects, a theoretical model based on Scale Relativity Theory in the form of The Multifractal Theory of Motion, in order to explain the mechanical behavior of such material, is proposed. The model is validated by analyzing the mechanical behavior of Cu–Al–Zn shape memory alloy with various chemical compositions. More precisely, the multifractal tunnel effect can “mime” the mechanical hysteresis of such a material, a situation in which a direct correspondence for several mechanical properties of Cu–Al–Zn is highlighted (the chemical composition can be correlated with the shapes of the curves controlled through the multifractality degree, while the areas delimited by the same curves can be correlated with the multifractal specific potential, as a measure of the mechanical memory degree).

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Ageing Behaviour of Sc-Doped Cu–Zn–Al Shape Memory Alloys

Cited by 11 publications

References 31 publications

Pengaruh waktu aging terhadap perubahan sifat fisik paduan ingat bentuk (shape memory alloy) Cu-Zn-Al

Pengaruh waktu aging terhadap perubahan sifat fisik paduan ingat bentuk (shape memory alloy) Cu-Zn-Al

Research Progress in Interfacial Characteristics and Strengthening Mechanisms of Rare Earth Metal Oxide-Reinforced Copper Matrix Composites

Theoretical and Experimental Designs on Several Mechanical Properties of Cu–Al–Zn Shape Memory Alloys Used in the Processing Industry

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