On the Full-Field Deformation of Single Crystal CuAlNi Shape Memory Alloys—Stress-Induced β<sub>1</sub> → γ'<sub>1</sub> Martensitic Transformation

Zhang, X.Y.; Xu, Terryting; Sun, Qingping; Tong, Penger

doi:10.1051/jp4:1997588

Cited by 5 publications

(6 citation statements)

References 3 publications

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“…Developments in the techniques of full-field measurements have recently also enabled the experimental analysis of the microstructural strain field over extended regions of a sample's surface. Moiré interferometry and digital image correlation are typical examples of such techniques, which collect information on the response of the tested SMA samples by distinguishing the different phases through their strain amplitude [24][25][26][27][28]. Infrared thermography has also been employed to measure the inhomogeneous temperature distributions associated with the phase change in SMAs, giving relevant information on the features of the martensitic transformation [29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Strain intermittency in shape-memory alloys

et al. 2015

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We study experimentally the intermittent progress of the mechanically-induced martensitic transformation in a Cu-Al-Be single crystal through a full-field measurement technique: the grid method. We utilize an in-house especially designed gravity-based device, wherein a system controlled by water pumps applies a perfectly monotonic uniaxial load through very small force increments. The sample exhibits hysteretic superelastic behavior during the forward and reverse cubic-monoclinic transformation, produced by the evolution of the strain field of the phase microstructures. The in-plane linear strain components are measured on the sample surface during the loading cycle, and we characterize for the first time the strain intermittency in a number of ways, showing the emergence of power-law behavior for the strain avalanching over almost six decades of magnitude. We also describe the non-stationarity and the asymmetry observed in the forward vs. the reverse transformation. The present experimental approach, which allows for the monitoring of the reversible martensitic transformation both locally and globally in the crystal, proves useful and enhances our capabilities in the analysis and possible control of transition-related phenomena in shape-memory alloys.

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Section: Introductionmentioning

confidence: 99%

Strain intermittency in shape-memory alloys

et al. 2015

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“…Example 7: Characterizing Sharp Austenite/ Martensite Interfaces with Moire ´Interferometry [42] A mention to the use of MI can be made here concerning small-scale measurements. Since applications of this technique to SMAs are quite rare in the literature, comparison cannot be made here with other techniques in terms of quality of the obtained results.…”

Section: Investigation Of Martensitic Microstructures In a Monocrysta...mentioning

confidence: 99%

Applying Full-Field Measurement Techniques for the Thermomechanical Characterization of Shape Memory Alloys: A Review and Classification

Delpueyo

Jury

Balandraud

et al. 2021

Shap. Mem. Superelasticity

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Full-field measurement techniques are now mature. As such, they have profoundly impacted the experimental mechanics community in recent years. The way that shape memory alloys (SMAs) are now tested is not spare from this deep-rooted trend, as reflected by the increasing number of papers published in the SMA literature. In this context, the aim of this contribution is to give an overview of the use of full-field measuring techniques for SMA characterization purposes. We recall first the basic principle of one volume and four surface techniques employed in this community. Several typical papers where such techniques are employed are then presented, by highlighting in each case the extent to which the thermomechanical response of SMAs could be better understood and modeled thanks to these techniques. A classification by several criteria of about 300 references is finally offered and discussed. The main criteria are the type of SMA, the type of technique employed to perform the measurements, and the type of test.

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“…For instance, moiré interferometry was used in Ref. [4] to analyze the displacement field due to martensitic transformation in a monocrystalline Cu-Al-Ni SMA. The technique used in more recent studies to measure displacement fields is digital image correlation (DIC).…”

Section: Introductionmentioning

confidence: 99%

Study of Phase Transformation Intermittency in S.M.A. Using the Grid Method

Barrera

Balandraud

Grédiac

et al. 2014

Fracture, Fatigue, Failure, and Damage Evolution, Volume 5

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The objective of this study is to show experimentally the intermittency of the phase transformation in a shape memory alloy using a kinematical full-field measurement method. The specimen is a Cu-Al-Be single crystal with Ms D 2 ı C. A uniaxial loading was applied by using a device based on gravity. In practice, a drop-by-drop device controlled by water pumps enabled us to apply a perfectly monotonic loading with very small force increments. The grid method was used to measure the strain fields on the specimen surface during the test. It is observed that the plateau which is classically obtained when the specimen transforms from austenite to martensite is actually characterized by an intermittency of the phase change. It means that the events, in terms of appearance of martensite needles and propagation, occur with an irregular alternation. The paper presents the experimental setup, the image processing and some typical results.

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On the Full-Field Deformation of Single Crystal CuAlNi Shape Memory Alloys—Stress-Induced β₁ → γ'₁ Martensitic Transformation

Cited by 5 publications

References 3 publications

Strain intermittency in shape-memory alloys

Strain intermittency in shape-memory alloys

Applying Full-Field Measurement Techniques for the Thermomechanical Characterization of Shape Memory Alloys: A Review and Classification

Study of Phase Transformation Intermittency in S.M.A. Using the Grid Method

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On the Full-Field Deformation of Single Crystal CuAlNi Shape Memory Alloys—Stress-Induced β1 → γ'1 Martensitic Transformation

Cited by 5 publications

References 3 publications

Strain intermittency in shape-memory alloys

Strain intermittency in shape-memory alloys

Applying Full-Field Measurement Techniques for the Thermomechanical Characterization of Shape Memory Alloys: A Review and Classification

Study of Phase Transformation Intermittency in S.M.A. Using the Grid Method

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On the Full-Field Deformation of Single Crystal CuAlNi Shape Memory Alloys—Stress-Induced β₁ → γ'₁ Martensitic Transformation