919 ジルコニア溶射被覆したSUS304鋼の高温疲労過程の観察(GS-3 熱変形・高温疲労・熱疲労)

概要

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The fatigue behavior of plasma-sprayed ZrO_2 ceramic on SUS304 stainless steel was examined. Tension-compression fatigue tests were conducted under the load control at room and elevated temperatures. The total strain range and the stress-strain hysteresis loop during fatigue process were monitored by using the laser speckle strain / displacement gauge (SSDG). The range of surface strain decreased with increasing the number of cycles at 873K, while it increased at room temperature. In both cases, the definite change in the shape of the stress-strain hysteresis-loop was not found except a final stage of the fatigue, although surface cracking was observed at an early stage in fatigue process. This was due to the good bond strength between the surface layer and the substrate in this material. It was found that the fatigue life was not strongly affected by the level of the bond strength.
一般社団法人日本機械学会の論文
2000-03-16