Mn-Cu-W系非磁性エリンバー型合金について

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  • On the New Nonmagnetic Elinvar-Type Alloys in the Mn-Cu-W System
  • Mn-Cu-Wケイ ヒジセイ エリンバーカタ ゴウキン ニ ツイテ

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Measurements of Young’s modulus at −150°∼400°C and of rigidity modulus, thermal expansion and hardness at room temperature have been carried out with Mn-Cu-W alloys subjected to cold working and a variety of heat treatment. In the Young’s modulus vs temperature curves, the ternary alloys slow cooled after heating for 1 hr at 900°C showed distinct anomalous changes which seem to be related to the antiferromagnetic\ ightleftarrowsparamagnetic transformation. Young’s modulus at room temperature did not show a large difference among the annealed, cold worked or water quenched states, but this value tend to increace with increasing manganese or tungsten contents. The temperature coefficient of Young’s modulus shows a wide variation with the operation of annealing, water quenching, cold working or reheating after water quenching or cold working, and also with alloy composition. It is to be noted that the temperature coefficient of Young’s modulus as a function of composition exhibits large positive maximum, thus showing the existence of the Elinvar property. The variation in rigidity modulus and its temperature coefficient with the heat treatment, cold reduction rate and composition shows a close similarity to that in Young’s modulus and its temperature coefficient. The hardness shows a very complicated change with the heat treatment, cold reduction rate and composition of the alloys, showing Vickers hardness of about 100 to 660. The corrosion resistance of Mn-Cu-W alloys is fairly good.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 36 (5), 498-503, 1972

    公益社団法人 日本金属学会

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