Mn-Cu-Mo系非磁性エリンバー型合金について

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  • Nonmagnetic Elinvar-Type Alloys in the Mn-Cu-Mo System
  • Mn-Cu-Mo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-Mo alloys subjected to cold working and a variety of heat treatment. In the Young’s modulus vs temperature curves, Mn-Cu-Mo alloys of about 30.10∼60.22%Cu and 3.10∼20.35%Mo 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 medulus at room temperature is generally higher in the annealed state than those in the cold worked or water quenched state and tends to increace with rise of reheating temperature after cold working or water quenching. The temperature coefficient of Young’s modulus shows a wide variation with the operations of annealing, water quenching, cold working, and 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 a large positive maximum, thus showing the Elinvar property. The variation in rigidity modulus and its temperature coefficient with heat treatment, cold working and composition shows a close similarity to that in Young’s modulus and its temperature coefficient. The hardness shows a very complicated change with composition, heat treatment and cold working of the alloys, showing Vickers hardness of about 130 to 700. The oxidation and corrosion resistances of Mn-Cu-Mo alloys are fairly good.

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  • 日本金属学会誌

    日本金属学会誌 36 (5), 492-497, 1972

    公益社団法人 日本金属学会

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