ＦＣ２５鋳鉄の振動による表面残留応力除去の挙動

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タイトル別名
  • The Behaviour of Vibrational Surface Residual Stress Relief in FC25 Cast Iron
  • FC25 チュウテツ ノ シンドウ ニ ヨル ヒョウメン ザンリュウ オウリョ

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The relief of surface residual stress in a FC25 Pearlitic Graphite Cast Iron plate has been experimentally studied using a large laboratory shaker. When the vibratory stress amplitude added to the residual stress is more than 0.02% offset stress in the materials, more residual stress is relieved. When the value is smaller than the added value, residual stress is not relieved. Unequally distributed residual stress throughout the specimen can be relieved through vibration. This is accomplished by changing the point at which the materials are held in the vibration equipment. By determining the number of vibration cycles and the stress amplitude, fatigue damage on the materials can be prevented under certain condition. After exposing the materials to vibratory stress, remarkable change in residual stress was not observed after exposure in open air for one month.

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