Ni-W合金の高温クリープ

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タイトル別名
  • High-Temperature Creep of Nickel-Tungsten Alloys (On the Relation between High-Temperature Creep and Diffusion in Nickel-Base Solid Solutions. VI)
  • Ni-W ゴウキン ノ コウオン クリープ

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Tensile creep properties of nickel-tungsten alloys containing up to about 10 at% of tungsten have been studied. Tests were carried out in argon atmosphere over the temperature range from 750° to 1200°C, and the stress range from 1.4 to 9 kg/mm2. Steady state creep rate (\dotεs) decreases with the increasing tungsten content. Temperature and stress dependences of steady state creep rate were analysed using Dorn’s equation, \dotεs=Cσnexp(−Qs⁄RT). Activation energies (Qs) are independent of applied stresses. They increase with the tungsten content from 66 kcal/mol for pure nickel to the maximum value of 84 kcal/mol for the alloy of 5 at%-tungsten, before they decrease with further increase of the tungsten content. Stress exponents (n) increase extremely with the tungsten content from a value of 5.0 for pure nickel to the maximum value of 7.2 for the alloy of 1.7 at%-tungsten. Whereas, in alloys containing more than this concentration of tungsten they decrease with the increasing content of tungsten to values less than that for pure nickel.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 28 (6), 304-307, 1964

    公益社団法人 日本金属学会

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