炭素鋼の熱処理と室温内部摩擦の関係

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タイトル別名
  • The Relationship between Heat-treatments and Room-Temperature Internal Friction of Some Carbon Steels
  • タンソ コウ ノ ネツ ショリ ト シツオン ナイブ マサツ ノ カンケイ

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The internal friction of several kinds of carbon steels were measured at room temperature by the transversal vibration of about 1.85 kc/s. The main results obtained were as follows: (1) The internal friction of martensitic specimens is proportional to the carbon content (after the completion of recovery at room temperature) and this internal friction is caused by the stress induced by diffusion of carbon atoms in the iron lattices. (2) A two-staged change of room-temperature internal friction was observed during the tempering process of martensitic specimens. This may be interpreted by the decrease of carbon atoms in the lattice,which precipitate into the forms of ε-carbide and cementite. (3) The internal friction of annealed specimens containing coarse free ferrite was proportional to the amplitude in our measuring range (maximum strain ca. 1.2×10−5) and this behavior was not affected by the presence of Ni, Cr or a large amount of hydrogen in the specimens. It indicates that the amplitude-dependent internal friction is caused by the magneto-mechanical hysteresis.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 23 (8), 469-473, 1959

    公益社団法人 日本金属学会

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