Fe-Cr系合金の減衰能特性について

書誌事項

タイトル別名
  • On the Damping Capacity of Fe-Cr Alloys
  • Fe Crケイ ゴウキン ノ ゲンスイノウ トクセイ ニ ツイテ

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抄録

The internal friction Q−1 was measured by an inverted torsion pendulum for Fe-Cr alloys containing 0∼35%Cr. The measured frequency and the maximum shear strain amplitude γm were 1.1 Hz, and 0.7∼167×10−6, respectively. Generally, the Q−1 value first increases gradually with increasing γm and then sharply increases. In the case of alloys heated at 1200°C, Q−1 goes through a maximum and then decreases.<BR>In Fe-Cr alloys slowly-cooled after heating at 800∼1200°C, the Q−1 value shows two maxima at the compositions of 5%Cr and 15%Cr and increases with increasing heating temperature. An Fe-15%Cr alloy exhibits the highest Q−1 value of 68×10−3m=80×10−6) when slowly-cooled after heating at 1200°C. Besides, the Q−1 value in the rapidly-cooled state shows a maximum only at the composition of 20%Cr.<BR>The variation in the rigidity modulus G with γm is quite similar to that of Q−1. Therefore, fairly large values of Q−1 in Fe-Cr alloys are probably attributable to magnetomechanical hysteresis.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 43 (6), 471-474, 1979

    公益社団法人 日本金属学会

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