Conventional pulse Echo method:
Total reflected energy is used to
detect the defects. It is effective for detecting small internal
flaws in underground pipelines etc.
Acoustic Holography or Phased Sequential
Arrays:
It giving improved defect imaging. These techniques are limited in practical applications, because of its difficulties in operation and high equipment cost.It detects of small-sized defects in austentitic stainless steel welds. This technique ensures the detection of the defects with large dimensions or the defects located outside the weld.
Ultrasonic time of flight diffraction method:
It s used to detect, size and to locate the defects. Whenever ultrasonic wave incidents on a defect, the wave reflects, transmits and also diffracts at the tips of the defect.
The most important important parameter for infrared measurment is emissivity. if emissivity is high then good quality of imaging will be available
For aluminium The emissivity is low that makes it to difficult to perform the operation.
Another parameter is reflectivity, it should be low for obtaining good infrared imaging but for aluminium it is very high since aluminium cant generate a good infrared image.
it involves in generating of erratic temperatures which may melt the low melting aluminiummetal.
Identify the two primary kinds of ultrasonic measurement in an industrial environment for monitoring/detection purposes and...
The YMCA conducted marketing research to gain a better understanding of how its brand was viewed by consumers. This activity is important because marketers are frequently called on to design and implement marketing research projects. The goal of this activity is to apply marketing research frameworks to the YMCA's research activities. Read about YMCA's marketing research efforts and answer the questions that follow. Over the years, the YMCA has come to mean different things to different people. Depending on the...
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