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

CrN 박막처리된 Ti-6Al-4V 합금의 기계적 성질과 피로특성

  • 박용권 (충북대학교 재료공학과) ;
  • 백창현 (충북대학교 재료공학과) ;
  • 위명용 (충북대학교 재료공학과)
  • Published : 2002.08.01

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.

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Cited by

  1. Enhanced wear and fatigue properties of Ti–6Al–4V alloy modified by plasma carburizing/CrN coating vol.18, pp.5, 2007, https://doi.org/10.1007/s10856-006-0014-0