Ultrasonic flaw detection of discontinuous defects in magnesium alloy materials

Phased array ultrasonic testing, an effective ultrasonic testing (UT) technology, has been widely used in steel inspection because of its high accuracy, sensitivity, and efficiency. However, as its application in as-cast magnesium alloys has just begun, more research is needed. Considering the impor...

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Bibliographic Details
Published in:China foundry 2019-07, Vol.16 (4), p.256-261
Main Authors: Xue, Sheng-nan, Le, Qi-chi, Jia, Yong-hui, Jiang, Li-ping, Zhang, Zhi-qiang, Bao, Lei
Format: Article
Language:English
Subjects:
Alloys
defect detection
Engineering
gain compensation
Machines
magnesium alloy
Magnesium alloys
Magnesium castings
Manufacturing
Materials Engineering
Metallic Materials
Metals (Materials)
Processes
Research & Development
Specialty metals industry
Technology
ultrasonic phased arra
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Summary:Phased array ultrasonic testing, an effective ultrasonic testing (UT) technology, has been widely used in steel inspection because of its high accuracy, sensitivity, and efficiency. However, as its application in as-cast magnesium alloys has just begun, more research is needed. Considering the important role of the gain compensation in quantifying defects in magnesium alloys by ultrasonic phased array technology, the effects of microstructure, the position, size, and overlap of defects, and boundary distance (distance from the defect position to the side surface of the test casting) on gain compensation of as-cast AZ80 and AZ31 magnesium alloys were studied. Results show the gain compensation increases with the increase of grain size. There is a strict linear positive correlation between gain compensation and defect depth, but such relationship no longer exists due to the defects overlap, orientation and boundary distance. In addition, there is a strict linear negative correlation between the gain compensation and defect size.
ISSN:1672-6421
2365-9459
1672-6421
DOI:10.1007/s41230-019-9041-6