Non-destructive Flaw Mapping of Steel Surfaces by the Continuous Magnetic Barkhausen Noise Method: Detection of Plastic Deformation

Autor(es)

Franco Grijalba, Freddy Armando ^[1] ; Padovese, Linilson Rodrigues ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Fac Mech Engn, Rua Mendeleyev 200, BR-13083860 Campinas, SP - Brazil

^[2] Univ Sao Paulo, Engn Sch, Dept Mech Engn, Av Prof Mello Moraes 2231, BR-05508900 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF NONDESTRUCTIVE EVALUATION; v. 37, n. 2 JUN 2018.
• Citações Web of Science: 2

Resumo

This paper reports the use of a non-destructive scanning technique to identify plastic deformation defects generated in steel. The technique is based on measurement of continuous magnetic Barkhausen noise (CMBN). In the experiments described here, surfaces with plastic deformations produced by crushing stresses in a 1070 steel are scanned, and the influence of probe configuration, coil type, scanner speed, applied magnetic field and the frequency band used for the analysis on the effectiveness of the technique is studied. A moving smoothing window based on a second order statistical moment is used to analyze the time signal. The results show that the method can detect the position of plastic deformation defects and distinguish between their amplitudes. (AU)

• Processo FAPESP: 05/57146-0 - Desenvolvimento de ensaio não destrutivo baseado no ruído magnético de Barkhausen para caracterização de tensões elásticas e deformações plásticas em aços estruturais
• Beneficiário: Freddy Armando Franco Grijalba
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto