Non-destructive testing (NDT) consists of many methods of testing parts for quality assurance without affecting the physical. Or chemical attributes of the parts.
This is a useful tool when a large percentage of parts have to be tested since methods,, Such as, tensile tests while supplying useful information destroy the, part so it cannot be used.
Most methods of NDT. (magnetic, particle testingUltrasonic testing eddy testing, current, penetrant testing visual, dye, testing etc.) require a trained operator to scan. For defects and subjectively interpret the results.
Not only does this mean that the test is subject to human error and. Requires an operator with, special training it takes significant time to scan a part and get results.
.Acoustic resonance testing (ART) is a method of non-destructive testing that does not have these drawbacks.
ART uses. The vibrational characteristics of an object to find defects.
Since changes anywhere in the part will affect the overall. Vibration of the part ART is, considered a whole-part test.
This means that measurements taken in one place can indicate. Defects, anywhereAs opposed to scanning methodologies.
It can be done quickly (one second or less) [] and 1 it can be completely automated. And, make objective quantitative judgments eliminating human, error.
ART can be used to find almost any defect that scanning. NDE methods can find. It can be used to find parts with out-of-tolerance dimensions voids cracks,,,,,, porosity inclusions Hardness and nodularity,,Among other things [2].
The one significant drawback of ART when compared with other NDE methods is that ART alone will. Generally not diagnose, the location size or type, of defect.
Other methods can be added to ART in order to determine. The causes of part rejections and help improve process control.
ART can be used as a quick automatic objective process,,, For 100% part.
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