couplant


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couplant

[′kəp·lənt]
(engineering)
A substance such as water, oil, grease, or paste used to avoid the retarding of sound transmission by air between the transducer and the test piece during ultrasonic examination.
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While the screws are being tightened this rubber or putty will compact and the ultrasonic transducer will be forced upward in contact with the top of the attachment, completely mating it with the top surface and wringing it with the required ultrasonic couplant.
By tapping a hole at the end of the sticker, we were able to screw in the bolt with grease couplant on the end, and lock it in place.
The strength of the reflected pulse, depicted by the height of the peak on the monitor, depends on several factors, including couplant viscosity, pressure applied on the transducer, roughness of the surface of the casting, the parallelism of the casting surfaces, porosity and material properties.
But ultrasonic tools cannot be used at all because of the absence of couplant in the pipeline.
Some of the topics covered included the relative cost-effectiveness of viscosity-reducing surface treatments on alumina trihydrate (ATH) of different particle sizes; effectiveness of different grafted polyolefins in coupling glass and PP; surface-treated microspheres as polymer blend compatibilizers; reground thermosets as low-cost fillers in polyolefins; property enhancement through coupling of natural cellulose-derived fillers in thermoplastics-including recycled materials; and a simple, new method of calculating how much couplant is just enough.
An advanced lift-off algorithm allows scanning in real world situations such as variations in paint thickness, surface roughness and other causes of lift-off and as with all eddy current equipment, inspections can be carried out with no need for direct contact with the material and with no need for couplant.
Electromagnetic acoustic transducer (EMAT) is a promising technology that offers the ability to detect and characterize corrosion, stress corrosion cracking (SCC), cracks, mechanical damage, laminations, coating disbondment and lack of fusion that can be used in live natural gas pipelines without a liquid couplant.
A separate board went through the whole process without ultrasonic testing, in order to evaluate how the couplant and testing influenced the eventual MC of the sample boards.
The developed probes required no ultrasonic couplant or cooling for the current study.
VivoSonic(R) Gel -- Microtek is introducing the first and only in-vivo biocompatible and biodegradable sterile couplant (gel) specifically formulated for diagnostic ultrasound.
The transducer is located in a holder so it can transmit the waves into the casting through the couplant.
EMAT UT is well-suited for use with robotic tools because no couplant or liquid product is required to be present in the line in order to conduct inspections.