Al-4%Ge 合金の機械的性質に及ぼす無電解ニッケル-りんめっきの影響

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タイトル別名
  • Effect of Electroless Ni-P Plating on the Mechanical Properties of Al-4%Ge Alloy
  • Al-4%Ge ゴウキン ノ キカイテキ セイシツ ニ オヨボス ムデンカイ ニッケル-リンメッキ ノ エイキョウ

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  In this study, the effect of electroless Ni-P plating on the mechanical properties of Al-4%Ge alloy was investigated. As the results, the following points were clarified. (1) Tensile strength of the specimen subjected to the Ni-P plating after aging treatment or furnace cooling treatment was improved by about 10% in comparison to one of the non-processed specimens. (2) Breaking elongation of the specimen subjected to the Ni-P plating after aging treatment showed no significant changes in comparison to one of the non-processed specimens. On the other hand, breaking elongation of the specimen subjected to Ni-P plating after a furnace cooling treatment was reduced to 70% in comparison to one of the non-processed specimens. (3) Fatigue strength of the specimen subjected to the Ni-P plating after a furnace cooling treatment was overall reduced rather than one of non-processed specimens. (4) Fatigue strength of the specimen subjected to the Ni-P plating after aging treatment was overall reduced, except for the low-stress region, rather than one of the non-processed specimens. (5) In the specimen subjected to Ni-P plating after a furnace cooling treatment or aging treatment, clear hydrogen desorption was recognized. On the other hand, there was only hydrogen desorption from a few of the non-processed specimens.<br>   Especially, it is considered that the poor fatigue strength and ductility of the plating materials are mainly due to the interaction between the surface precipitates and hydrogen gas.<br>

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 79 (3), 146-150, 2015

    公益社団法人 日本金属学会

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