Grain size and temperature influence on the toughness of a CuAlBe shape memory alloy

Albuquerque, Victor Hugo C. de; Melo, Tadeu Antonio de Azevedo; Gomes, Rodinei Medeiros; Lima, Severino Jackson Guedes de; Tavares, João Manuel R. S.

doi:10.1016/j.msea.2010.09.034

Cited by 29 publications

(9 citation statements)

References 24 publications

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“…This result was verified by, the austenite→martensite and the martensite→austenite transformation temperatures obtained from DSC measurements of the alloy sample. X-ray diffraction measurements and optical microscope observations also support this result [37,38]. Comparing the DSC analysis of CuAlBe shape memory alloy samples treated with an irradiation dose of 40 kGy, the transformation temperatures changed and the temperature difference A f -M s decreased.…”

Section: Discussionmentioning

confidence: 53%

Effect on Thermal and Structural Properties of Element Content in CuAlBe Shape Memory Alloys Irradiated with a Constant Gamma Radiation Dose

Balo

ORHAN²

2023

Turkish Journal of Science and Technology

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Shape memory alloys with two different weight percentages of CuAlBe were irradiated with a 40 kGy constant gamma radiation dose, and the resulting thermal and structural changes in the alloys were examined. Changes in enthalpy and in the transformation temperature of the alloys were determined by differential scanning calorimetry (DSC), and thermodynamic parameters of alloy samples were calculated. Microstructural changes were determined by X-ray analysis. Microstructural changes were verified by metallographic observations, and microhardness measurements were taken. The study investigated to what extent the physical parameters of CuAlBe shape memory alloys changed depending on the alloying elements when subjected to a constant irradiation dose.

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Section: Discussionmentioning

confidence: 53%

Effect on Thermal and Structural Properties of Element Content in CuAlBe Shape Memory Alloys Irradiated with a Constant Gamma Radiation Dose

Balo

ORHAN²

2023

Turkish Journal of Science and Technology

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“…4b). Cof presents different variations and peaks that can correspond to grain limits or different metallic compounds with a higher Cof [21]. martensite (m) state of materials with austenite to martensite transformation is a softer state compared to stiffer austenite.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Structural and Mechanical Properties of Hot Rolled CuAlBe Non-Spark Alloy Explosion

Chelariu,

Cimpoeșu,

Paraschiv

et al. 2024

Archives of Metallurgy and Materials

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Explosion protection is of particular importance for safety as explosions also endanger the health of workers due to the uncontrolled effects of flames and pressure, the presence of harmful reaction products and the consumption of oxygen in the ambient air breathed by workers. CuAlBe alloy is proposed as a solution for mechanical actuators such as gears that work in environments with possible explosive atmosphere. Made of CuBe master alloy and pure aluminum in a induction furnace the material present large grains in melted state. After the hot rolling (heated 600s at 900°C) of the ingots small variation of chemical composition was observed based on the oxidation of the material, appearance of small cracks on the edges and a preferential orientation of the grains along the lamination direction. Scanning electron microscopy (SEM) was used to characterize the microstructural states of CuAlBe as laminated and heat treated states.

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“…Too low martensitic transformation temperature seriously limits the development of Cu-Sn SMAs. Thus the present commonly used Cu-based SMAs are almost developed from Cu-Al or Cu-Zn binary systems through alloying, for example, Cu-Al-Ni, Cu-Zn-Al and Cu-Al-Be alloys [1][2][3][4]. Cu-based SMAs have easier fabrication, lower manufacturing cost, and excellent conductivity of heat and electricity, thus they have shown great potentials for practical applications in various engineering devices as actuators or sensors.…”

Section: Introductionmentioning

confidence: 99%

Abnormal grain growth in annealing cast Cu–Al–Mn–V alloys and their superelasticity

Yang

Chi

Zhang

et al. 2019

Smart Mater. Struct.

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Metals are usually difficult to fabricate bulk materials with a large grain size over cm-scale only through heat treatment with neither directional solidification nor macroscopic deformation. This paper reports a novel method to obtain large grains and single crystals over cm-scale only through simply annealing polycrystalline cast Cu-Al-Mn-V shape memory alloys. The results show that the abnormal grain growth (AGG) directly occurs when cast alloys are annealed at 1173 K, and ultra-large grains and single crystals are obtained after quenching. The AGG results from unique microstructure of cast Cu-Al-Mn-V alloys. All cast alloys consist of L2 1 -Cu 2 AlMn parent and completely coherent bcc A2(V) nanoparticles due to bcc phase separation. The results further show that the dissolution of A2(V) nanoparticles into the matrix during annealing results in a continuous misorientation gradient within the matrix grains. It may provide the driving force for the rapid migration of grain boundaries, leading to the AGG. Furthermore, the single crystals close to [ ] 901 exhibit good superelasticity. Cu-13.7Al-8.6Mn-1.4 V single crystal shows the largest full superelasticity of 7.0%, and Cu-13.2Al-9.8Mn-0.7 V single crystal exhibits the largest superelastic strain of 5.4%.

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Grain size and temperature influence on the toughness of a CuAlBe shape memory alloy

Cited by 29 publications

References 24 publications

Effect on Thermal and Structural Properties of Element Content in CuAlBe Shape Memory Alloys Irradiated with a Constant Gamma Radiation Dose

Effect on Thermal and Structural Properties of Element Content in CuAlBe Shape Memory Alloys Irradiated with a Constant Gamma Radiation Dose

Structural and Mechanical Properties of Hot Rolled CuAlBe Non-Spark Alloy Explosion

Abnormal grain growth in annealing cast Cu–Al–Mn–V alloys and their superelasticity

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