Phase stability in the Cu-9  wt%Al-10  wt%Mn-3  wt%Ag alloy

Santos, C.M.A.; Adorno, A. T.; Paganotti, A.; Silva, C.C.S.; Oliveira, Alexandre Barbosa de; Silva, R.A.G.

doi:10.1016/j.jpcs.2017.01.012

Cited by 12 publications

(7 citation statements)

References 25 publications

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“…In the last years, the authors have been questioned about their methodology and created this method to standardize and fully explain the preparation of metallic samples by arc melting. This method is a detailed procedure compiling the authors experience in preparing and analyzing metallic samples from alloys such as: CuAl [[1], [2], [3], [4], [5]]; SnCu [6]; CuAlZr [4]; CuAlCo [4]; CuAlSn [5]; CuAlGd [2,3,5]; CuAlMn [[1], [2], [3],5,[7], [8], [9], [10]]; SnCuAg [6]; CuAlAg [1]; FeNiCo [11]; CuAlMnAg [1,[7], [8], [9], [10],[12], [13], [14], [15]]; CuAlMnSn [5]; CuAlMnGd [2,3,5].…”

Section: Introductionmentioning

confidence: 99%

Metallic sample preparation for phase transformation analysis

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Metallic sample preparation for phase transformation analysis

et al. 2019

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“…The addition of Ag to SMA alloys of the Cu-Al system improves their hardness, corrosion resistance, aging properties and magnetic properties, as stated by Silva et al [13]. Santos et al [14] attributes the increased microhardness of ternary alloys with 3%at. Ag to the formation of bainite.…”

Section: Introductionmentioning

confidence: 87%

“…This is typical behavior for Cu-SMA materials and is consistent with previous studies of SMAs. [11][12][13][14][37][38][39][40][41] The slight variance in the hardness between the tested values, in both as-cast and quenched conditions can be ascribed to the formation of mechanically induced martensite in stressed areas, occurring under high indentation loads [42].…”

Section: Effect Of Quenching On the Alloy Hardnessmentioning

confidence: 99%

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A Microstructural Study of Cu-10Al-7Ag Shape Memory Alloy in As-Cast and Quenched Conditions

Liverić,

Sitek,

Snopiński

et al. 2024

Symmetry

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Shape memory alloys (SMAs) represent an exceptional class of smart materials as they are able to recover their shape after mechanical deformation, making them suitable for use in actuators, sensors and smart devices. These unique properties are due to the thermoelastic martensitic transformation that can occur during both thermal and mechanical deformation. Cu-based SMAs, especially those incorporating Al and Ag, are attracting much attention due to their facile production and cost-effectiveness. Among them, Cu-Al-Ag SMAs stand out due to their notably high temperature range for martensitic transformation. In this study, a Cu-based SMA with a new ternary composition of Cu-10Al-7Ag wt.% was prepared by arc melting and the samples cut from this casting alloy were quenched in water. Subsequently, the phase composition and the development of the microstructure were investigated. In addition, the morphology of the martensite was studied using advanced techniques such as electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). The analyzes confirmed the presence of martensitic structures in both samples; mainly 18R (b1′) martensite was present but a small volume fraction of (γ1′) martensite also was noticed in the as-quenched sample. The observation of fine, twinned martensite plates in the SMA alloy with symmetrically occurring basal plane traces between the twin variants underlines the inherent correlation between microstructural symmetry and the properties of the material and provides valuable insights into its behavior. The hardness of the quenched sample was found to be lower than the as-cast counterpart, which can be linked to the solutioning of Ag particles during the heat treatment.

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“…Of the elements that are not completely soluble in the β-phase, Fe shows the greatest microalloying effect on the properties of Cu-Al-Mn alloys and, depending on the content added, increases the temperature of the martensitic transformation. Studies have also shown that the addition of Ti, Co, Cr, and Si mainly contributes to the poorer mechanical properties of Cu-Al-Mn SMAs [28][29][30]. Microalloying with magnesium, on the other hand, does not significantly change the properties of the ternary alloy and does not affect the change in martensitic transformation temperatures [18].…”

Section: Introductionmentioning

confidence: 99%

Influence of Manganese Content on Martensitic Transformation of Cu-Al-Mn-Ag Alloy

Liverić,

Holjevac Grgurić,

Mandić

et al. 2023

Materials

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The influence of manganese content on the formation of martensite structure and the final properties of a quaternary Cu-Al-Mn-Ag shape memory alloy (SMA) was investigated. Two alloys with designed compositions, Cu- 9%wt. Al- 16%wt. Mn- 2%wt. Ag and Cu- 9%wt. Al- 7%wt. Mn- 2%wt. Ag, were prepared in an electric arc furnace by melting of high-purity metals. As-cast and quenched microstructures were determined by optical microscopy and scanning electron microscopy equipped with EDS. Phases were confirmed by high-energy synchrotron radiation and electron backscatter diffractions. Austenite and martensite transformations were followed by differential scanning calorimetry and hardness was determined using the Vickers hardness test. It was found that the addition of silver contributes to the formation of the martensite structure in the Cu-Al-Mn-SMA. In the alloy with 7%wt. of manganese, stable martensite is formed even in the as-cast state without additional heat treatment, while the alloy with 16%wt. of manganese martensite transforms only after thermal stabilization and quenching. Two types of martensite, β1′ and γ1′, are confirmed in the Cu-9Al-7Mn-2Ag specimen. The as-cast SMA with 7%wt. Mn showed significantly lower martensite transformation temperatures, Ms and Mf, in relation to the quenched alloy. With increasing manganese content, the Ms and Mf temperatures are shifted to higher values and the microhardness is lower.

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Phase stability in the Cu-9 wt%Al-10 wt%Mn-3 wt%Ag alloy

Cited by 12 publications

References 25 publications

Metallic sample preparation for phase transformation analysis

Metallic sample preparation for phase transformation analysis

A Microstructural Study of Cu-10Al-7Ag Shape Memory Alloy in As-Cast and Quenched Conditions

Influence of Manganese Content on Martensitic Transformation of Cu-Al-Mn-Ag Alloy

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