Correlation between uniaxial ratcheting and magnetic response under cyclic loadings in X80 pipeline steel. (7th June 2018)

• Record Type: Journal Article
• Authors: Bao, Sheng; Gu, Yibin; Hu, Shengnan; Fu, Meili; Lou, Huangjie
• Is Part Of: Strain. Volume 54:Number 5(2018:Oct.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-06-07
• Subjects: magnetic response -- magnetomechanical effect -- pipeline steel -- uniaxial ratcheting; Strains and stresses -- Measurement -- Periodicals; 624.176
• DOI: 10.1111/str.12281
• Languages: English
• ISSNs: 0039-2103

Abstract

Abstract: The objective of this research is to explore the correlation between uniaxial ratcheting behaviour and magnetic response under asymmetrical cyclic stressing in X80 pipeline steel. The magnetic field variations from cycle to cycle were recorded simultaneously during ratcheting. Analysis made in the present work shows that the magnetic hysteresis loop evolves systematically with the number of cycles in terms of its shape and position. The most prominent result here is that the magnetic field under a certain stress first decreases sharply in the preliminary stage of ratcheting, followed by a stable decreasing period with an approximately linear slope. Furthermore, it can be concluded that ratcheting influences the changes in magnetic field more significantly under tensile stress than compressive stress. The underlying reason of the strong non‐linearity of the magnetic field evolution was discussed.