CrN 박막처리된 Ti-6Al-4V 합금의 기계적 성질과 피로특성

박용권; 백창현; 위명용; Yong-Gwon Park; Chang-Hyung Baeg; Myeong-Yong Wey

Korean Journal of Materials Research, Vol.12, No.8, 669-675, August, 2002

DOI10.3740/MRSK.2002.12.8.669 Export Citation

CrN 박막처리된 Ti-6Al-4V 합금의 기계적 성질과 피로특성

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

박용권^†, 백창현, 위명용

충북대학교 재료공학과

Yong-Gwon Park^†, Chang-Hyung Baeg, and Myeong-Yong Wey

Dept. of Materials Engineering, Chungbuk National University, Cheongju, 361-763, Korea

E-mail:

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 μm 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 μm ) compared with matrix alloy (Ra=0.321 μm ). 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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