3544 ハステロイ溶射材の片振り引張応力下での腐食疲労(S12-2 環境効果および薄板材,S12 先進性金属材料の疲労特性と組織)

概要

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WC sprayed coatings are often occurred the corrosion fatigue fracture under the aqueous solution, because corrosion pits generate at the interface between the coating and the substrate. This study focused on the spraying pressure as well as the powder composition. The mechanical, corrosion, and corrosion fatigue fracture properties were investigated for three thermal spray materials fabricated by a spray gun with variable pressure. The corrosion fatigue strength of a specimen coated by WC/NiCrMo-A was the highest in the three type of coated specimen. It is thought that the mechanochemical response was controlled by a combination of: (1) The residual compressive stress generated by high spraying pressure for decreasing the effective stress, and (2) Enhanced corrosion resistance resulting from easy passivation of the coating components.
社団法人日本機械学会の論文
2006-09-15