Non-destructive scanning for applied stress by the continuous magnetic Barkhausen noise method

Autor(es)

Franco Grijalba, Freddy A. ^[1] ; Padovese, L. R. ^[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, Polytech Sch, Dept Mech Engn, Av Prof Mello Moraes 2231, BR-05508900 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Magnetism and Magnetic Materials; v. 446, p. 231-238, JAN 15 2018.
• Citações Web of Science: 5

Resumo

This paper reports the use of a non-destructive continuous magnetic Barkhausen noise technique to detect applied stress on steel surfaces. The stress profile generated in a sample of 1070 steel subjected to a three-point bending test is analyzed. The influence of different parameters such as pickup coil type, scanner speed, applied magnetic field and frequency band analyzed on the effectiveness of the technique is investigated. A moving smoothing window based on a second-order statistical moment is used to analyze the time signal. The findings show that the technique can be used to detect applied stress profiles. (C) 2017 Elsevier B.V. All rights reserved. (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