Nondestructive Evaluation of Metal Matrix Composites
Is Version Of
Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
The objective of the subject program was to apply nondestructive evaluation (NDE) methods to assess the integrity of FP/Mg composites. The material investigated was ZE41A magnesium alloy reinforced with FP (aluminum oxide) fiber. Twenty-one specimens (three specimens of each of six flawed and three unflawed specimens) were evaluated using ultrasonic scanning, wave propagation velocity, wave attenuation coefficient, and x-ray radiograph inspection techniques. The results for two of the 21 specimens are included herein.
After the NDE inspections were completed, a representative specimen from each of the seven groups was sectioned and micrographs were made for comparison with the NDE records. It was found that ultrasonic scanning using a 15 MHz compression wave, focused transducer operated in the pulse-echo mode generating an analog C-scan gave the best pictorial results. The wave attenuation and wave propagation velocity measurements were found to be consistent with the ultrasonic C-scans, but x-ray radiography was useful only at locations of gross material defects.