Fatigue crack growth properties of ceramic coated 1Cr-1Mo-0.25V steel

세라믹 코팅된 1Cr-1Mo-0.25V강의 피로균열성장 특성

Seo, Chang-Min;Kim, Gyeong-Ryeol

  • Published : 1997.10.01


Fatigue tests were performed to investigate the effect of ceramic coatings as in TiN and TiCN on fatigue crack growth properties of ceramic coated 1Cr-1Mo-0.25V steel with different coating thickness in laboratory air conditions. The experimental results are described with respect to a Paris equation, da/dN=C(.DELTA.K)$^{m}$ , where the crack growth rate of coated specimens provided as similar growth rate as that of the uncoated specimen regardless of coating thickness. Furthermore, it was observed that the type of coating layer had virtually no effect on crack growth rate in the full region of stress intensity factor range. And it was also appeared that the final crack length of TiCN coated specimens was short compared to that of TiN coated, and the substrate specimens, in which it was inferred due to lowering the toughness of coated material from high hardness of TiCN coating layer itself.


TiN Ceramic Coating;Fatigue Crack Growth Rate;Arc Ion Plating;AIP;Fractography;Stress Intensity Factor Range


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