Affiliations: [a] State Key Laboratory for Strength and Vibration of
Mechanical Structures, Xi'an Jiaotong University, Xi'an, China | [b] Department of Mechanical and Electrical Engineering,
Ningxia Polytechnic, Yinchuan, China | [c] Institute of Fluid Science, Tohoku University, Sendai,
Japan | [d] The Kansai Electric Power Co., Fukui-ken, Japan
Correspondence:
[*]
Corresponding author: Zhenmao Chen, State Key Laboratory for
Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, 28
West Xianning Road, Xi'an 710049, China. Tel./Fax: +1 86 29 82668736; E-mail:
[email protected]
Abstract: In this paper, the correlation between plastic deformation and the
deformation-induced magnetic field was experimentally investigated for the
SUS304 austenitic stainless steel. Test-pieces with different shapes were
fabricated to produce different strain distribution. Various plastic tensile
loads were imposed into the specimens to introduce plastic deformations of
different levels. The residual strain distributions at the surfaces of the
specimens were measured by an optical 2D strain measurement system during
loading process while the distributions of the deformation-induced magnetic
fields above the specimens were measured by using a fluxgate magnetometer after
each loading cycle. The experimental results show that the amplitudes of the
magnetic field have a clear and repeatable relationship with the maximum
residual strains for all the specimens, and the relationship is independent of
the strain distribution. Based on the experimental results, the mechanism of
the deformation-induced magnetic field was discussed, and a NonDestructive
Evaluation (NDE) method was proposed for the quantitative evaluation of plastic
deformation in the SUS304 stainless steel.
