ラム波用電磁超音波探触子を用いたステンレス鋼板のr値評価

抄録

A Lamb wave-mode electromagnetic acoustic transducer (EMAT) which makes use of the Lorenz force and magnetostrictive effect is produced as a device to evaluatethe r-value of stainless steel sheet. Correlation between fundamental characteristics of this device and r-value obtained from uniaxial tensile test is examined for stainless steel and low carbon steel sheets. It is confirmed that the use of this device enables the evaluation of the r-values of ferrite stainless and austenite stainless steel sheets as well as low carbon steel sheets. It is also shown that the value of Δr whichgives the planar anisotropy of a sheet can be evaluated in good accuracy for the stainless steel sheets than for the low carbon steel sheet.