One-Dimensional Heat Source Reconstruction Applied to Phase Transforming Superelastic Ni-Ti Wire

Jury, A.; Balandraud, Xavier; Heller, Luděk; Alarcon, Eduardo; Karlı́k, Miroslav

doi:10.1007/978-3-030-30098-2_6

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…where is the density (kg.m -3 ), the specific heat (J.kg -1 .K -1 ), the thermal conductivity (W.m -1 .K -1 ), the temperature (K) and the power density of heat-induced by external field sources such as Joule heating induced by applied electrical field (W.m -3 ). This equation can be reduced to a 1D version in the case of long thin specimens [23,24,26,[39][40][41][42][43][44][45][46]. It can be written in the following form after division by and considering that does not vary in time during the temperature measurement:…”

Section: Heat Source Reconstructionthe Backgroundmentioning

confidence: 99%

“…[11]. IR thermography is an alternative way to evidence phase transition in these alloys, see for instance Refs [12][13][14][15][16][17][18][19][20][21][22][23][24]. Indeed, the AM (forward) and MA (reverse) transformations are accompanied by latent heat release and absorption, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…By heat source, we mean the heat power density (in W.m -3 ) released or absorbed by the material itself, i.e., due to changes in its physical state and not due to heat conduction, convection or radiation. HSR is based on the heat diffusion equation, where individual terms are evaluated from measured time-resolved temperature fields [23][24][25][26][27]. This approach has not yet been fully developed and used as opposed to other full-field measurement techniques in mechanics of materials such as DIC or TSA (thermoelastic stress analysis).…”

Section: Introductionmentioning

confidence: 99%

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Reconstruction of Heat Sources Induced in Superelastically Loaded Ni-Ti Wire By Localized Deformation Processes

et al. 2020

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Background: Shape memory alloys (SMAs) are phase transforming materials featuring strong thermomechanical couplings. Infrared thermography and heat source reconstruction (HSR) enable to track the calorific signature of deformation processes. Objective: The objective was to characterize the transformation processes in a superelastic nickel-titanium SMA wire subjected to a force-controlled superelastic tensile cycle. Methods: In-situ recorded thermographs were converted into spatiotemporal maps of heat sources using an inhouse developed post-processing method based on the heat diffusion equation resolved numerically for unknown heat sources. Results: Sequentially appearing patterns of localized transformation events of four types were identified and associated with martensite bands nucleations and their subsequent merging upon tensile loading. Analogically, the events associated with austenite bands nucleations and their subsequent merging were identified upon unloading. In addition, weak heat sources observed before and after the localized transformation events were associated with the homogeneous martensitic transformation. Conclusions:The intrinsic dissipation heat associated with the nucleation and merging events is estimated to be ~25% of the released/absorbed latent heat.

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Section: Heat Source Reconstructionthe Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reconstruction of Heat Sources Induced in Superelastically Loaded Ni-Ti Wire By Localized Deformation Processes

et al. 2020

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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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Heat Source Reconstruction and Its Relationship with Functional Fatigue of Pseudoelastic NiTi Ribbons

Bustos

Soul

Alonso

et al. 2022

Shap. Mem. Superelasticity

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One-Dimensional Heat Source Reconstruction Applied to Phase Transforming Superelastic Ni-Ti Wire

Cited by 3 publications

References 14 publications

Reconstruction of Heat Sources Induced in Superelastically Loaded Ni-Ti Wire By Localized Deformation Processes

Reconstruction of Heat Sources Induced in Superelastically Loaded Ni-Ti Wire By Localized Deformation Processes

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

Heat Source Reconstruction and Its Relationship with Functional Fatigue of Pseudoelastic NiTi Ribbons

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