温度変動に対するニッケルめっき応力測定法の適応性の検討

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  • On the adaptability of the nickel electroplating method of stress analysis to variable test temperatures.
  • オンド ヘンドウ ニ タイスル ニッケル メッキ オウリョク ソクテイホウ ノ

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The adaptability of the electroplating method of stress analysis to variable test temperatures is examined by using nickel plating foil of 5 μm in thickness. The test temperatures vary gradually or stepwise in the range from 100°C to 200°C. The relations between the proper stress σp of the nickel plating foil and the number of stress cycles N, namely, the σp-N curves at variable test temperatures are obtained by the calibration tests in rotating bending in which N=(0.54.5)×106 cycles are designated. It is found that the σp-values at variable test temperatures can be estimated by using the formulas of the σp-N curves at constant temperatures, which is based on the assumption that the appearance of slip-bands in the nickel plating foil owing to cyclic straining is subject to the linear cumulative damage law.

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