Effect of Metal Spray on Corrosion Fatigue Strength of Welded Joints

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概要

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• This experiments have been carried out for determining the optimum condition of plasma metal spray for improving corrosion fatigue strength of a welded joint. In addition it has been shown that the effect of shot peening, aimed at reducing tensile residual stress of the sprayed metal layer, is remarkable. The corrosive liquid were used a 3% NaCl solution and a mixed liquid of CuSO_4 : 0.9%, FeSO_4 : 0.4%, NaCl : 1%. From the present study, the following conclusions have been obtained : (1) Metal spray has proved to be useful in practice for improving the corrosion fatigue strength of welded joints. (2) The ENCZ seal of the non-solvent type is preferable to AP and CV seals of the solvent type. (3) The tensile residual stress in the sprayed metal layer is converted to the compressive stress by shot peening.

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著者

• Nishioka Akio

  Hitachi Research Laboratory Hitachi Ltd.

• Ohuchida Hisashi

  Fundamental Engg. Technology Center Hitachi Ltd.

• YOKOTA Hirakazu

  Hitachi Research Laboratory, Hitachi, Ltd.

• Yokota Hirakazu

  Hitachi Research Laboratory Hitachi Ltd.

関連論文

• Fatigue Limit of Steel with Cracks
• Size Effect on Fatigue Strength of Machined Carbon Steel : X-Ray Detection of Fatigue Damage in Machine Parts
• Fatigue Strength Of Steel Shafts Built-Up by Welding
• Studies on the Fatigue Crack Initiation and Propagation : Report 1,Effects of Crack Length, Stress Range and Minimum Stress on Fatigue Crack Propagation
• Effect of Metal Spray on Corrosion Fatigue Strength of Welded Joints

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