皮膜ひずみ計測によるアルミナ溶射SUS304鋼の高温疲労過程の観察

概要

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Fatigue tests were conducted at both 873 K and room temperature for an alumina-sprayed type 304 stainless steel. In order to clarify the fatigue processes such as cracking and delamination in ceramics-coated stainless steel, surface strain was monitored by using a laser speckle strain gauge during the fatigue test. It was found that the substrate strain was fully reflected on the surface strain unless either crack or subsurface delamination was initiated. The surface strain was found to decrease when the interface delamination was initiated. The cracking in the ceramics layer occurred immediately after the cyclic loading at 873 K. However, the crack in the ceramics layer didn't penetrate into the substrate at both 873 K and room temperature. The final failure was caused by the growth of a substrate-crack newly initiated at the delaminated interface of the substrate.
一般社団法人日本機械学会の論文
2000-08-25