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

Plăcintă, Constantin; Stanciu, Sergiu; Panainte-Lehăduș, Mirela; Moșneguțu, Emilian; Nedeff, Florin; Nedeff, Valentin; Tomozei, Claudia; Petrescu, Tudor-Cristian; Agop, Maricel

doi:10.3390/ma16041441

Cited by 4 publications

(3 citation statements)

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“…Let it be noted that such scenarios were employed before in the description of mechanical behaviors of various materials. For example, in [ 22 ], a Schrödinger type scenario was used for the description of the hysteresis-type behavior of shape memory alloys.…”

Section: Discussionmentioning

confidence: 99%

The Cracking Behavior of Two Dental Composite Materials Validated through Multifractal Analyzes

Nica

Nedeff

et al. 2023

IJMS

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The aim of this in vitro study was to analyze, both experimentally and theoretically, the mechanical behavior of two types of composite materials used in restoring dental integrity. The samples of each composite resin, namely Filtek Supreme XT (3M ESPE, St. Paul, MN, USA) and Filtek Z250 (3M ESPE, St. Paul, MN, USA), were experimentally analyzed by determining their compressive strength and fracture behavior. The fractured fragments of the samples were subjected to surface evaluation by scanning electron microscopy. The compressive stress—compressive strain dependencies revealed stronger cracking of the Filtek Supreme XT composite than Filtek Z250 prior to fracture. Theoretically, the evaluation was made by means of holographic implementations of such types of composite materials. A Hooke-type equation in a differential form is presented, which links the proposed theoretical model with the experimentally obtained data.

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Section: Discussionmentioning

confidence: 99%

The Cracking Behavior of Two Dental Composite Materials Validated through Multifractal Analyzes

Nica

Nedeff

et al. 2023

IJMS

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“…The development of alloys with SMA is mainly influenced by the grain size, microstructure, texture and orientation [11,12], which has allowed the manufacture of materials emerging from various sectors of the industry such as medical implants, electrical connectors, fiber optic sensors, antennas for mobile phones, as well as anti-corrosion protective layers [13,14]. However, the investigations involving the Cu-Al alloy system have been poorly documented regarding the behavior of SMA in saline environments.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Tempering Heat Treatment on the Cu-Based Shape Memory Alloy Exposed to a Commonly used Corrosive Medium

Flores-Sanchez,

Suárez-Rosales,

Landa-Castro

et al. 2023

J. Mex. Chem. Soc.

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Abstract. In the present work, the corrosion behavior of the as-cast Cu-9Al-3Ag alloy, with shape memory, SMA, and with tempering heat treatments at two temperatures, 400 and 600 °C, were studied. These treatments were selected due to the austenite-martensite phase transition or vice versa. For this investigation, a 0.5 M NaCl electrolyte was used. Micrographs using optical microscopy and scanning electron microscopy show the martensite phase in the Cu-9Al-3Ag alloy, likewise, in the tempered samples the austenite-martensite phases were also observed. For the evaluation of the corrosion behavior, the Tafel model was implemented, for whose curves a potential of ±200 mV was used from the Ecorr. It was observed that the sample with SMA presented a good resistance to corrosion, as well as the tempered samples, unlike the as-cast sample. Finally, impedance tests were carried out using a frequency range of 100 kHz to 10 mHz and an amplitude of 10 mV, in order to observe the resistances to the solution and to the charge transfer present in each one of the samples used. Resumen. En el presente trabajo se estudió el comportamiento de corrosión en la aleación Cu-9Al-3Ag en estado de colada, con memoria de forma en conjunto con tratamientos térmicos de revenido a temperaturas de 400 y 600 °C. Dichos tratamientos fueron seleccionados debido al cambio de transición de fase austenita-martensita o viceversa. Para esta investigación se utilizó un electrolito a 0.5 M NaCl. Las micrografías mediante microscopia óptica y microscopia electrónica de barrido muestran la fase martensita en la aleación Cu-9Al-3Ag, así mismo, en las muestras revenidas se puede observar las fases austenita-martensita. Para la evaluación del comportamiento de corrosión se implementaron las curvas de Tafel, en las cuales se utilizó un potencial de ±200 mV a partir del Ecorr. Se observó que la muestra con SMA presento una buena resistencia a la corrosión al igual que las muestras revenidas a diferencia de la muestra en estado de colada. Por último, se realizaron pruebas de impedancia utilizando un rango de frecuencia de 100 kHz a 10 mHz y una amplitud de 10 mV, con la finalidad de observar las resistencias a la solución y a la transferencia de carga presentes en cada una de las muestras utilizadas.

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“…As an intelligent material, shape memory alloys, which include NiTi, NiTiCu, and NiTiAl, possess the properties of superelasticity, temperature phase transition, shape memory effect, and pre-strain. They demonstrate promising application potential for noise and vibration control [21][22][23][24]. A new type of orthogonal antisymmetric composite laminate is formed by inserting SMAs into the matrix material of the laminate [25].…”

Section: Introductionmentioning

confidence: 99%

Sound Quality Performance of Orthogonal Antisymmetric Composite Laminates Embedded with SMA Wires

Huang

Wang

et al. 2023

Materials

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Orthogonal antisymmetric composite laminates embedded with shape memory alloys (SMAs) wires have the potential to improve the sound quality of vibro-acoustics by taking advantage of the special superelasticity, temperature phase transition, and pre-strain characteristics of SMAs. In this research, space discretion and mode decoupling were employed to establish a vibro-acoustic sound quality model of SMA composite laminates. The association between the structural material parameters of SMA composite laminates and the sound quality index is then approached through methodologies. Numerical analysis was implemented to discuss the effects of SMA tensile pre-strain, SMA volume fraction, and the ratio of resin-to-graphite in the matrix on the vibro-acoustic sound quality of SMA composite laminates within a temperature environment. Subsequently, the sound quality test for SMA composite laminates is thus completed. The theoretically predicted value appears to agree well with the experimental outcomes, which validates the accuracy and applicability of the dynamic modeling theory and method for the sound quality of SMA composite laminates. The results indicate that attempting to alter the SMA tensile pre-strain, SMA volume fraction, and matrix material ratio can be used to modify loudness, sharpness, and roughness, which provides new ideas and a theoretical foundation for the design of composite laminates with decent sound quality.

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

Cited by 4 publications

References 40 publications

The Cracking Behavior of Two Dental Composite Materials Validated through Multifractal Analyzes

The Cracking Behavior of Two Dental Composite Materials Validated through Multifractal Analyzes

Effect of the Tempering Heat Treatment on the Cu-Based Shape Memory Alloy Exposed to a Commonly used Corrosive Medium

Sound Quality Performance of Orthogonal Antisymmetric Composite Laminates Embedded with SMA Wires

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