ジルコニア溶射被覆SUS304鋼の高温疲労過程と表面ひずみ挙動

概要

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Fatigue tests were conducted at both 893 K and room temperature for a zirconia-sprayed type 304 stainless steel. Surface strain was monitored by using a laser speckle strain gauge during the fatigue test to examin the fatigue processes such as cracking and delamination of subsurface layer. Fatigue life of an Atomospheric Plasma Spraying (APS) zirconia-coated specimen was similar to that of a blasted substrate. A cracking occurred in the ceramics layer at the early stage of fatigue failure and the crack penetrated into the substrate. However, substrate-bondcoating interface interfered with the crack penetration into the substrate. In case of a Low Pressure Plasma Spraying (LPPS) zirconia-coated specimen, the fatigue life was longer than that of blasted substrate. The bond coating layer made by LPPS was found to restrain a crack from initiating in the substrate.
一般社団法人日本機械学会の論文
2001-07-25