| METADEX Antwortnummer 19 - © 1998 CSA |
| Title |
| | Effects of Uniaxial Stress on Magnetoacoustic Emission Spectra of Steel. |
| Author |
| | Namkung, M. (NASA Langley Research Center); Utrata, D. (Association of American Railroads); DeNale, R. (D.W. Taylor Research Center); Grainger, J.L. (AS&M) |
| Publication Source |
| | Plenum Press. 233 Spring St., New York, New York 10013, USA. 1991. 1959-1965, 6 ref. Accession Number: 92(4):72-158
Conference: Review of Progress in Quantitative Nondestructive Evaluation. Vol. 10B, La Jolla, California, USA, 15-20 July 1990 |
| Document Type |
| | Conference Article |
| Country of Publication |
| | United States |
| Language |
| | English |
| Abstract |
| | The experimental results of HY80 steel samples cut from railroad wheels clearly demonstrate the asymmetry in the MAE burst caused by uniaxial compressive stress when an ac magnetic field is applied parallel to the stress axis. The asymmetric pattern of MAE burst under compression is different characteristically from that due to embrittlement. The origin of such an asymmetry can be explained based on two-dimensional model of 90 deg domain wall motion under uniaxial compressive stress. The symmetry in the MAE burst is also seen to be restored < -200 MPa due to the restriction on the range of 90 deg domain wall motion. It is also expected that an application of a more intense external ac magnetic field will cause an asymmetric MAE burst in the HY80 steel sample < -200 MPa and higher. |
| Accession Number |
| | 92(4):22-344 |
