Effects of uniaxial stress on magnetic field-induced domain wall motion

Author

Namkung, M. ; Utrata, D. ; DeNale, R.

Author_Institution

NASA Langley Res. Center, Hampton, VA, USA

fYear

1990

fDate

4-7 Dec 1990

Firstpage

983

Abstract

The applied AC magnetic field intensity dependence of asymmetry in an MAE (magnetoacoustic emission) burst under uniaxial compressive stress was investigated with a temper embrittled HY80 steel sample. The results showed that existence of a threshold in the AC field intensity that triggers the asymmetry. An increase in compressive stress magnitude was seen to increase this threshold value, and the maximum output of the currently available magnetizing unit was insufficient to create an asymmetric MAE pattern under 200 MPa. The degree of embrittlement may not affect the detection of residual compressive stress in this material

Keywords

acoustic emission testing; alloy steel; embrittlement; magnetic domain walls; magnetoacoustic effects; tempering; applied AC magnetic field intensity dependence; asymmetry; compressive stress magnitude; embrittlement; high alloy steels; magnetic field-induced domain wall motion; magnetoacoustic emission burst; residual compressive stress; temper embrittled steel; threshold value; uniaxial compressive stress; uniaxial stress; Background noise; Compressive stress; Frequency; Image coding; Magnetic domain walls; Magnetic fields; Magnetic properties; Power amplifiers; Power supplies; Steel;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1990. Proceedings., IEEE 1990

Conference_Location

Honolulu, HI

Type

conf

DOI

10.1109/ULTSYM.1990.171509

Filename

171509