Title :
Nondestructive evaluation of material properties with EMAT (formability in cold rolled steel sheets and residual stress in railroad wheel)
Author :
Murayama, R. ; Fujisawa, K. ; Fukuoka, Hiroki ; Hirao, M. ; Yonehara, S.
Author_Institution :
Sumitomo Metal Ind. Ltd., Amagasaki, Japan
Abstract :
Ultrasonic techniques using an EMAT (electromagnetic acoustic transducer) for evaluating material properties were developed. Two items are described. One is the evaluation of the formability in cold-rolled steel sheets by using the S0-mode plate-wave EMAT. The other is the measurement by the stress in the rim of railroad wheels by using two polarized SH-waves EMATs. The experimental results obtained in these techniques agree with theoretical predictions, and the techniques are useful for monitoring the material properties
Keywords :
carbon steel; cold rolling; elastic constants; internal stresses; plastic deformation; recrystallisation texture; strain gauges; ultrasonic materials testing; ultrasonic transducers; S0-mode plate-wave EMAT; US techniques; acoustoelastic constants; electromagnetic acoustic transducer; low C steel; plastic deformation; railroad wheel; recrystallisation texture; residual stress; strain gauge; theoretical predictions; two polarized SH-waves EMATs; Acoustic measurements; Acoustic transducers; Electromagnetic measurements; Material properties; Polarization; Steel; Stress measurement; Ultrasonic imaging; Ultrasonic variables measurement; Wheels;
Conference_Titel :
Ultrasonics Symposium, 1989. Proceedings., IEEE 1989
Conference_Location :
Montreal, Que.
DOI :
10.1109/ULTSYM.1989.67171
