| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
We have proposed the frequency sweeping excitation and spectrogram method by a magnetic sensor for low carbon steels. It was examined that the degrees of yield strength of low carbon steels were varied depending on hardened conditions. We evaluated the yield strength of them and the hardened practical car seat parts quantitatively and non-destructively by our proposed method. As a result, the followings can be summarized, (1)The proposed method is applicable to evaluate the degree of the yield strength hardened, the spectrograms of Hc and Wm, show the changes of the yield strength qualitatively. (2)By using the change ratio of Hc and the frequency gradient of Wm, which are derived from the spectrograms, it was shown that the good correlation depending on the degree of the yield strength had been confirmed. It can be said that our proposed method can evaluate the mechanical characteristics by measuring magnetic properties quantitatively.
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