Materials characterization at high temperatures using laser ultrasound

Paul, M.; Haberer, B.; Arnold, W.

doi:10.1016/0921-5093(93)90276-k

Cited by 34 publications

(7 citation statements)

References 7 publications

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“…Because of its noncontact manner, the laser ultrasonic method has attracted special interest, resulting in numerous studies, such as the measurement of high-temperature Young's modulus of iron alloys, 7 Gr/epoxy composites, 8 and SiC ceramics. 9 Measurements of high-temperature Young's modulus using laser ultrasonic methods have been reviewed in a book edited by Scruby and Drain. 10 Detection of laser-generated ultrasound can be accomplished using several types of optical interferometers, such as Michelson, Mach-Zehnder, and Fabry-Pérot.…”

Section: Introductionmentioning

confidence: 99%

Measurement of High‐Temperature Elastic Properties of Ceramics Using a Laser Ultrasonic Method

Matsumoto

Nose

Nagata

et al. 2001

Journal of the American Ceramic Society

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Young's modulus and Poisson's ratio of SiC ceramics at temperatures >1400°C were obtained using a laser ultrasonics method that included a Fabry-Pérot interferometer (LUFP).At temperatures <1000°C, Young's modulus and Poisson's ratio measured using the LUFP method agreed well with those measured using standard contact methods, such as the resonance method and the ultrasonic pulse method. These results showed that the LUFP method is a powerful tool for measuring high-temperature elastic properties of advanced ceramics in a noncontact manner.

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Section: Introductionmentioning

confidence: 99%

Measurement of High‐Temperature Elastic Properties of Ceramics Using a Laser Ultrasonic Method

Matsumoto

Nose

Nagata

et al. 2001

Journal of the American Ceramic Society

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“…Absorption measurements are performed with the reverberation technique proposed by Willems in 1987 [6] combined with laser-ultrasonics [7,8]. An ultrasonic pulse is generated at the surface of a finite-size sample (about 1 cm 2 area and 1 mm thick) with a focused excimer laser pulse (KrF at 248 nm, 5 ns duration, 200 mJ energy).…”

Section: Internal Frictionmentioning

confidence: 99%

Laser-Ultrasonic Characterization of the Annealing Process of Low-Carbon Steel

Lamouche¹,

Krüger²,

Gille³

et al. 2003

AIP Conference Proceedings

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Laser-ultrasonic measurements are performed during the annealing of cold-worked low-carbon steel at temperatures between 590°C and 610°C. During annealing, the ultrasound velocity behaves in a peculiar way, first decreasing and then increasing to a final value. The recrystallized fraction evaluated by metallography indicates that recrystallization occurs during both the decrease and the increase in longitudinal velocity. Texture evaluated using laser ultrasonics suggests that the peculiar behavior of the velocity might be due to two different regimes of texture evolution. Internal friction, investigated through ultrasound absorption measurements, is also revealed to be very sensitive to the annealing process. This internal friction is attributed to magnetomechanical effects that are also known to decrease the ultrasonic longitudinal velocity and probably contribute to the observed peculiar behavior of the velocity. From this work, we conclude that, although there remains much work to do to explain our observations, both the longitudinal velocity and internal friction measurements are promising approaches for the development of an online sensor to characterize annealing using laser-ultrasonics.

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“…Paul et al further improved the reverberation technique [4] by combining it with laser ultrasonics. In laser ultrasonics, ultrasound is generated with a short laser pulse and detected with another laser combined with an interferometer, making this technique completely non-contact.…”

Section: Introductionmentioning

confidence: 98%

Influence of steel heat treatment on ultrasonic absorption measured by laser ultrasonics

Lamouche

Bolognini

Kruger

2004

Materials Science and Engineering: A

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Laser ultrasonics is combined with the reverberation technique to measure ultrasound absorption during thermal cycles applied to medium-carbon steel samples. During heating to the austenitic phase, a small Snoek peak is observed around 360 • C at 10 MHz along with a signature of the ferromagnetic to paramagnetic transition near 768 • C. Upon cooling, the behavior of the internal friction is much different from that of heating: reduced high-temperature absorption, delayed phase transition, smaller magnetoelastic contribution and stronger Snoek peak are observed. The austenitizing temperature is found to have primary importance on the internal friction behavior during cooling. These measurements show that ultrasound absorption measurements using laser ultrasonics could serve as a basis for a technique to characterize the microstructure evolution of steel in various temperature ranges.

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Materials characterization at high temperatures using laser ultrasound

Cited by 34 publications

References 7 publications

Measurement of High‐Temperature Elastic Properties of Ceramics Using a Laser Ultrasonic Method

Measurement of High‐Temperature Elastic Properties of Ceramics Using a Laser Ultrasonic Method

Laser-Ultrasonic Characterization of the Annealing Process of Low-Carbon Steel

Influence of steel heat treatment on ultrasonic absorption measured by laser ultrasonics

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