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http://dx.doi.org/10.3740/MRSK.2002.12.8.669

Mechanical Properties and Fatigue Characteristics of CrN Coated Ti-6Al-4V alloy  

Park, Yong-Gwon (충북대학교 재료공학과)
Baeg, Chang-Hyung (충북대학교 재료공학과)
Wey, Myeong-Yong (충북대학교 재료공학과)
Publication Information
Korean Journal of Materials Research / v.12, no.8, 2002 , pp. 669-675 More about this Journal
Abstract
CrN film coated by AIP method, improved the mechanical properties (Hardness, Roughness, wear and fatigue) of Ti-6Al-4V alloy. The properties were studied using GXRD, XPS, Hardness, Roughness, wear and fatigue testers. CrN thin film thickness was about 7.5$\mu\textrm{m}$ and grew with (111) orientation. Hardness of CrN thin film was very high (Hv 1390) and roughness of the surface layer was greatly improved (Ra=0.063$\mu\textrm{m}$) compared with matrix alloy (Ra=0.321$\mu\textrm{m}$). Such changes of hardness and roughness could be contributed to improving the wear resistance and fatigue life. Striation like pattern with dimples and voids, a typical fatigue fracture mode, was observed throughout the specimen.
Keywords
Ti-6Al-4V alloy; CrN thin film; hardness; fatigue life; wear resistance;
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