Austenitic stainless steel is usually classified as a nonmagnetic material. However, applying stress transforms the plastic part of it into a martensitic crystal struct ure, from an austenitic crystal structure and it becomes magnetized. Strain evaluation and fatigue evaluation can be performed by measuring the leakage magnetic flux de nsity of remanent magnetization after applying strain and fatigue to austenitic stainless steels. This paper describes the measurement of leakage magnetic flux density of r...
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Evaluation of Strain and Plane Bending Fatigue for Austenitic Stainless Steel by Measuring Leakage Magnet Flux

Abstract: This paper presents a frequency sweeping excitation and spectrogram method (FSES m ethod) by magnetic sensor for non-destructive testing of hardened carbon steel. This method c an evaluate the magnetic properties in materials which were changed after induction heating. And, we tried to examine the degree of yield strength which varies with hardened conditions....
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Non-destructive material evaluation for ferromagnetic steels by using a magnetic sensor

This paper presents a non-destructive evaluation method to evaluate hardness and hardening depth of carbon steels by measuring m agnetic properties. Magnetic properties of carbon steel samples under different hardening temperature condition are examined by using the FSES method. The results show that the magnetic properties of the hardened carbon steels differ from each other depend ing on the hardening temperature. It can be said that the FSES method is useful to evaluate the hardening depth and the hardn...
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Non-destructive Material Evaluation by Measuring Magnetic properties by Magnetic Sensors

Abstract: This paper presents a non-destructive evaluation for high chrome Fe-based steels by using a magnetic sensor. In order to make clea r the fundamental magnetic properties related to tensile strain damage and fatigue damage, the magnetic measurement apparatus, which can mea sure the magnetic flux density and the magnetic field strength by B-coil and H-coil, was developed. And then the relationships between the d amages and the measured magnetic properties are shown to discuss the capability of a non...
英字タイトル:
Non-destructive evaluation for high chrome Fe-based steels by using a magnetic sensor