Phase transformations and aging of the Cu72.9Al15.0Mn10.5Ag1.6 alloy

Santos, C.M.A.; Adorno, A. T.; Oda, Nobuyuki; Sales, B.O.; Silva, L.S.; Silva, R.A.G.

doi:10.1016/j.jallcom.2016.05.303

Cited by 8 publications

(5 citation statements)

References 12 publications

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“…Based on the obtained results, it can be concluded that Cu-9.4%Al-1.1%Mn-3.7%Ag alloy has higher martensite start (Ms) temperature (105.0 • C) than Cu-9.5%Al-5.6%Mn-3.9%Ag alloy (61.8 • C). Both in- vestigated alloys have higher Ms temperatures than Cu-10%Al-8%Mn-4%Ag alloy (29.5 • C) [11] and Cu--7.0%Al-10.0%Mn-3.0%Ag alloy (-50 • C) [9]. This is in line with the literature results [3] on the basis of which the martensite transformation temperatures decrease with increasing contents of manganese and aluminium.…”

Section: Transformation Temperatures Of the As-quenched Cu-al-mn-ag Asupporting

confidence: 90%

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Effect of Mn content on the microstructure and phase transformation temperatures of the Cu-Al-Mn-Ag shape memory alloys

Manasijević¹,

Grgurić²,

Balanović³

et al. 2020

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Two quaternary Cu-Al-Mn-Ag shape memory alloys with nearly constant Al and Ag contents and variable content of Mn were prepared by arc melting of pure metals. Experimentally determined overall compositions of the investigated alloys were Cu-9.4%Al-1.1%Mn-3.7%Ag (alloy 1) and Cu-9.5%Al-5.6%Mn-3.9%Ag (alloy 2) (in wt.%). Microstructures of the prepared samples were investigated in the as-prepared condition and after heat treatment, which included solution annealing at 850 • C and quenching into the ice water. The effects of alloy composition and heat treatment on the microstructure and transformation temperatures of the investigated shape memory alloys were investigated using scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS) and differential scanning calorimetry (DSC). It was determined that alloy with low Mn content (alloy 1) exhibits martensite + α microstructure in the as-prepared state and the as-quenched state. The volume fraction of α-phase was much larger in the as-prepared condition. Ag was uniformly distributed between the co-existing phases. The microstructure of the alloy with a higher content of Mn (alloy 2) was fully martensitic in both investigated conditions. Martensite and austenite transformation temperatures were investigated using DSC.

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Section: Transformation Temperatures Of the As-quenched Cu-al-mn-ag Asupporting

confidence: 90%

“…It is known that microstructure and transformation temperatures of Cu-based SMAs are also strongly dependent on their heat treatment [8]. The silver addition to Cu-Al-Mn alloys may improve its corrosion resis- tance, microhardness, and characteristic phase transformation temperatures [9,10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Mn content on the microstructure and phase transformation temperatures of the Cu-Al-Mn-Ag shape memory alloys

Manasijević¹,

Grgurić²,

Balanović³

et al. 2020

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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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“…This increased interest stems from the addition of manganese in binary Cu-Al alloys, which serves to stabilize the β-phase region and extend it towards lower aluminum concentrations. As a result, the β-phase exhibits increased stability against diffusive decomposition [8][9][10][11][12]. As the alloy cools, the β-phase undergoes transformations with disordered order and progresses from β(A2) to β 2 (B2) to β 1 (L2 1 ) [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Conversely, at lower aluminum concentrations, typically below 16%at., A2 transforms either into A1 (disordered face-centered cubic structure f.c.c.) or into a 2M structure [10][11][12]. Depending on the chemical composition, various martensite structures can be observed in Cu-based SMA, including hexagonal 2H and rhombohedral structures 9R, 18R, 6R and 3R [11,12,[17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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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Phase transformations and aging of the Cu72.9Al15.0Mn10.5Ag1.6 alloy

Cited by 8 publications

References 12 publications

Effect of Mn content on the microstructure and phase transformation temperatures of the Cu-Al-Mn-Ag shape memory alloys

Effect of Mn content on the microstructure and phase transformation temperatures of the Cu-Al-Mn-Ag shape memory alloys

Metallic sample preparation for phase transformation analysis

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

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