Use of time history speckle pattern and pulsed photoacoustic techniques to detect the self-accommodating transformation in a Cu–Al–Ni shape memory alloy

Sánchez-Arévalo, Francisco M.; Aldama-Reyna, Claver W.; Lara-Rodríguez, A. G.; García-Fernández, T.; Pulos, G.; Trivi, Marcelo; Villagrán-Munı́z, M.

doi:10.1016/j.matchar.2010.02.008

Cited by 9 publications

(2 citation statements)

References 26 publications

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“…Finally, the changes in the speckle images captured during laser diode irradiation are analyzed using the time history speckle pattern (THSP). This is based on reconstructing an image using a sequence of speckle pattern variations and correlating the changes in the THSP image [13].…”

Section: Experiments and Sample Preparationmentioning

confidence: 99%

Laser induced deformation in polydimethylsiloxane membranes with embedded carbon nanopowder

Pimentel‐Domínguez

Sánchez-Arévalo

Hautefeuille

et al. 2013

Smart Mater. Struct.

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We demonstrate optically induced micron-range deformation of polydimethylsiloxane (PDMS) membranes with embedded carbon nanopowder. The mechanical deformation can be controlled by low power laser irradiation of the samples and the resulting surface modifications are analyzed via dynamic speckle measurements. Photothermal effects due to optical absorption by the nanopowder are shown to deform the polymer samples leading to localized mechanical stresses induced via thermal expansion of the PDMS.

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Section: Experiments and Sample Preparationmentioning

confidence: 99%

Laser induced deformation in polydimethylsiloxane membranes with embedded carbon nanopowder

Pimentel‐Domínguez

Sánchez-Arévalo

Hautefeuille

et al. 2013

Smart Mater. Struct.

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“…Conventional ways to obtain the shape memory effect (SME) include temperature changes, stress, exposure to magnetic fields, or a combination of these [3,4]. In metallic alloys, the SME is more commonly reached by temperature or stress [5], although new alternatives such as laser irradiation have been explored as well. This interesting option for triggering thermomechanical effects in Ni-Ti SMA is based on heating through laser irradiation [6,7], thus offering the possibility of remotely modifying the shape of Ni-Ti elements and allowing for the development of light activated actuators [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Enhanced photomechanical response of a Ni–Ti shape memory alloy coated with polymer-based photothermal composites

Pérez-Zúñiga

Sánchez-Arévalo

Hernández‐Cordero

2017

Smart Mater. Struct.

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A simple way to enhance the activation of shape memory effects with light in a Ni–Ti alloy is demonstrated. Using polydimethylsiloxane-carbon nanopowder (PDMS+CNP) composites as coatings, the one-way shape memory effect (OWSME) of the alloy can be triggered using low power IR light from a laser diode. The PDMS+CNP coatings serve as photothermal materials capable to absorb light, and subsequently generate and dissipate heat in a highly efficient manner, thereby reducing the optical powers required for triggering the OWSME in the Ni–Ti alloy. Experimental results with a cantilever flexural test using both, bare Ni–Ti and coated samples, show that the PDMS+CNP coatings perform as thermal boosters, and therefore the temperatures required for phase transformation in the alloy can be readily obtained with low laser powers. It is also shown that the two-way shape memory effect (TWSME) can be set in the Ni–Ti alloy through cycling the TWSME by simply modulating the laser diode signal. This provides a simple means for training the material, yielding a light driven actuator capable to provide forces in the mN range. Hence, the use of photothermal coatings on Ni–Ti shape memory alloys may offer new possibilities for developing light-controlled smart actuators.

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Advances in Speckle Metrology

Joenathan

Sirohi

Bernal

2015

The Optics Encyclopedia

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The field of speckle metrology has seen a surge in development in the past 10 years owing to advancements in digital cameras and computing power. For instance, a variety of digital speckle correlation (DSC) processes can now be performed in almost real time and therefore speckle techniques has found applications in nondestructive testing (NDT), biology, and medicine. New techniques in terms of optical arrangements and in extracting phase data have been introduced for measuring out‐of‐plane and in‐plane motions in digital speckle interferometry (DSPI) and digital speckle shear interferometry (DSSPI). DSC, DSPI, and DSSPI have also been combined to extend the range of measurements. In addition, quantitative analysis in speckle interferometry has seen a plethora of new software developments for conducting real‐time, accurate, complicated, fast, and repeatable measurements with ease. In addition, different methods to process speckle fringes have made analysis equivalent to that of classical interferometry, yet can be applied to all types of real‐world specimen.

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Use of time history speckle pattern and pulsed photoacoustic techniques to detect the self-accommodating transformation in a Cu–Al–Ni shape memory alloy

Cited by 9 publications

References 26 publications

Laser induced deformation in polydimethylsiloxane membranes with embedded carbon nanopowder

Laser induced deformation in polydimethylsiloxane membranes with embedded carbon nanopowder

Enhanced photomechanical response of a Ni–Ti shape memory alloy coated with polymer-based photothermal composites

Advances in Speckle Metrology

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