Open AccessStudy on the characteristics of metal magnetic memory signal of X70 pipeline steel
Author(s) -
Xiyong Zhang,
Yun Chen,
Yonghong Chen
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1605/1/012088
Subject(s) - signal (programming language) , component (thermodynamics) , magnetic memory , pipeline (software) , materials science , structural engineering , mechanics , stress (linguistics) , surface (topology) , acoustics , ferromagnetism , condensed matter physics , computer science , composite material , physics , engineering , mechanical engineering , geometry , mathematics , linguistics , philosophy , layer (electronics) , thermodynamics , programming language
In view of the zero crossing phenomenon of the normal component of the magnetic memory signal on the surface of the ferromagnetic component in the crack or stress concentration, many scholars have disputes about it. In this paper, through the simulation of the crack by wire cutting, the normal component of the magnetic leakage signal on the surface of the pipeline component is stretched on the tensile testing machine, and the normal component of the magnetic memory signal on the surface of the pipeline component is analyzed. It is found that the zero crossing phenomenon does exist in the normal component of the crack, but the zero crossing occurs with the pulling when the load increases to a certain extent, it will not drift after passing the zero point. The results show that the normal component cannot be used to judge the crack or stress concentration simply.