Fe-Mo-Cr系合金の減衰能ならびに耐孔食性

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  • Damping Capacity and Pitting Corrosion Resistance of Fe-Mo-Cr Alloys
  • Fe Mo Crケイ ゴウキン ノ ゲンスイノウ ナラビニ タイ コウショクセ

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The damping capacity and the anodic polarization behaviour in a 3%NaCl solution were studied on Fe-Mo-Cr alloys containing 1-16%Mo and 2-35%Cr after various heat-treatment. Measurement of the internal friction Q−1 was carried out by the inverted tortion pendulum method at a frequency of 1 Hz. The tensile strength σt and the pitting potential Ep were measured using an Instron-type testing machine and a potentiostat, respectively.<BR>In the state of furnace-cooling, the Q−1 value of the Fe-Mo-Cr alloys with small amounts of Mo and Cr is considerably high, while the alloys with large amounts of Mo and Cr are low in Q−1 because the intermetallic compounds precipitate in the ferromagnetic α phase matrix. On the other hand, the numerous alloys subjected to water-quenching are fairly high in Q−1 because of the single phase α solid solution.<BR>The σt in both the states increases considerably with increasing Mo and Cr contents. The increment in σt upon furnace-cooling is more than that in the case of water-quenching.<BR>The Ep value of the furnace-cooled alloys is generally low, while the numerous alloys become higher in Ep by water-quenching where high Q−1 value appears.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 47 (5), 439-445, 1983

    公益社団法人 日本金属学会

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