MATERIALS
Modeling of the process of ultrasonic flaw detection of materials with internal microdefects of different origin
- 1 Cherkasy State Technological University, Cherkassy, Ukraine
Abstract
Miniaturization of technical products is one of the driving forces for the development of high-tech systems. The article considers the most well-known method of determining microdefects of microwelded joints – the method of ultrasonic flaw detection. It is known that microdefects weaken the cross-section of the micro-seam, reduce its strength and are stress concentrators. A dynamic computer model of ultrasound propagation in microwelded welds of metal containing defects of micrometric size of various shapes filled with gas (most often, air) was created. For ultrasonic control, oscillations with a frequency of 0.5 MHz and a direct transducer emitting longitudinal waves perpendicular to the contact surface into the welded joint were used. On the basis of results of computer modeling the regularity of sensitivity of measurement of microdefects from parameters of the ultrasonic microdefectoscope which with a high degree correlates with experimentally received data is revealed.
Keywords
References
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