Title :
Estimation of residual stresses in magnetic metals by using ultrasonic method
Author :
Hatafuku, Hiroshi ; Sarudate, Chizuru ; Konno, Atushi
Author_Institution :
Dept. of Electr. & Electron. Eng., Iwate Univ., Morioka, Japan
fDate :
9/1/2002 12:00:00 AM
Abstract :
The residual stresses in deformed magnetic metal rods are estimated by measuring the electromotive force induced from a propagation of ultrasonic waves. When a longitudinal ultrasonic wave is transmitted to magnetic metals, a magnetic field with an ultrasonic wave frequency is generated in specimens by the inverse effect of magnetostriction. The magnetic field is detected as an electromotive force induced in a sensing coil. In this paper, it is shown that the amplitude of electromotive force due to ultrasonic waves depends on both the effective magnetic field and the residual stress in magnetic materials deformed. As a result, the residual strain of as-received specimens estimated is the same as a 10% deformed rod.
Keywords :
Permalloy; coercive force; ferromagnetic materials; internal stresses; magnetoacoustic effects; magnetoelastic effects; nickel; plastic deformation; stress-strain relations; ultrasonic materials testing; Fe-Ni; Ni; Permalloy; coercive force; deformed magnetic metal rods; effective magnetic field; electromotive force; ferromagnetic materials; inverse effect of magnetostriction; longitudinal ultrasonic wave; magnetoacoustic state; magnetoelastic energy; plastic deformation; residual stresses; sensing coil; stress-strain curves; ultrasonic wave frequency magnetic field; ultrasonic wave propagation; Coils; Force measurement; Frequency; Magnetic field induced strain; Magnetic field measurement; Magnetic materials; Magnetostriction; Residual stresses; Stress measurement; Ultrasonic variables measurement;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.802299
