Elastic characterization of ceramic balls using resonant ultrasound spectroscopy of spheroidal modes

2008 ◽  
Vol 123 (5) ◽  
pp. 3691-3691
Author(s):  
François Deneuville ◽  
Marc Duquennoy ◽  
Mohammadi Ouaftouh ◽  
Frédéric Jenot ◽  
Mohamed Ourak ◽  
...  
Keyword(s):  
Resonant Ultrasound Spectroscopy ◽  
Resonant Ultrasound

Full tensorial characterization of PZN-12%PT single crystal by resonant ultrasound spectroscopy

2008 ◽  
Vol 55 (2) ◽  
pp. 476-488 ◽  
Author(s):  
T. Delaunay ◽  
E. Le Clezio ◽  
M. Guennou ◽  
H. Dammak ◽  
Mai Pham Thi ◽  
...  
Keyword(s):  
Single Crystal ◽  
Resonant Ultrasound Spectroscopy ◽  
Resonant Ultrasound

Determination of the Hydrogen Concentration in Zr-2.5Nb Alloy by a Resonant Ultrasound Spectroscopy

2006 ◽  
Vol 321-323 ◽  
pp. 1576-1579
Author(s):  
Yong Moo Cheong ◽  
Young Suk Kim
Keyword(s):  
Hydrogen Concentration ◽  
Zirconium Alloy ◽  
Nuclear Reactor ◽  
Zirconium Alloys ◽  
Resonant Ultrasound Spectroscopy ◽  
Heavy Water Reactor ◽  
Resonant Ultrasound ◽  
Non Destructive

Zirconium alloys are used for many applications in nuclear components, such as the pressure tube material in a pressurized heavy water reactor, nuclear fuel cladding, etc. One of the problems during the operation of a nuclear reactor is the degradation of the zirconium alloys, which is due to an increase of the hydrogen content in the zirconium alloy. Therefore a non-destructive determination of the hydrogen concentration in zirconium alloy is one of the important issues that need to be addressed. The resonant ultrasound spectroscopy (RUS) technique is evaluated for a characterization of the hydrogen concentration in Zr-2.5Nb alloy. Referring to the terminal solid solubility for dissolution (TSSD) of Zr-2.5Nb alloy, the plot of the mechanical damping coefficient (Q-1) versus the temperature or the deviation of the resonant frequency for the temperature (df/dT) versus the temperature was correlated for the hydrogen concentration in Zr-2.5Nb alloy. It was found that the temperature at an abrupt change of the slope can be correlated with the hydrogen concentration of the Zr-2.5Nb alloy.

scholarly journals Softening of Shear Elastic Coefficients in Shape Memory Alloys Near the Martensitic Transition: A Study by Laser-Based Resonant Ultrasound Spectroscopy

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1383
Author(s):  
Petr Sedlák ◽  
Michaela Janovská ◽  
Lucie Bodnárová ◽  
Oleg Heczko ◽  
Hanuš Seiner
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Single Crystals ◽  
Accurate Determination ◽  
Martensitic Transition ◽  
Elastic Coefficient ◽  
Resonant Ultrasound Spectroscopy ◽  
Resonant Ultrasound

We discuss the suitability of laser-based resonant ultrasound spectroscopy (RUS) for the characterization of soft shearing modes in single crystals of shape memory alloys that are close to the transition temperatures. We show, using a numerical simulation, that the RUS method enables the accurate determination of the c′ shear elastic coefficient, even for very strong anisotropy, and without being sensitive to misorientations of the used single crystal. Subsequently, we apply the RUS method to single crystals of three typical examples of shape memory alloys (Cu-Al-Ni, Ni-Mn-Ga, and NiTi), and discuss the advantages of using the laser-based contactless RUS arrangement for temperature-resolved measurements of elastic constants.

Application of Laser-Ultrasound for Characterization of Plasma-Sprayed Ceramics

2016 ◽  
Vol 368 ◽  
pp. 69-72
Author(s):  
Martin Koller ◽  
Hanuš S. Seiner ◽  
Petr Sedlák ◽  
Jiří Kotlan ◽  
Pavel Ctibor ◽  
...  
Keyword(s):  
Elevated Temperatures ◽  
Sodium Metasilicate ◽  
Calcium Titanate ◽  
Acoustic Properties ◽  
Polished Surface ◽  
Resonant Ultrasound Spectroscopy ◽  
Water Stabilized Plasma ◽  
Resonant Ultrasound ◽  
Plasma Sprayed

Laser-based resonant ultrasound spectroscopy (RUS) method was applied to measure elastic constants of a porous calcium titanate coating manufactured by water-stabilized plasma-spraying (WSP). To enhance the reflectivity of the polished surface of this material for the lasers applied at RUS measurements, a thin coating of sodium metasilicate (waterglass) was used. It is discussed how the metasilicate affects the acoustic properties of the underlying porous material and experimentally shown that such a surface treatment enables the characterization of the structural processes in these materials at elevated temperatures.

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