摘要： Thin film metallic glasses (TFMGs) with unique physical and mechanical properties have attracted interest in the past decade. With the aim of taking their advantages to their applications, a 200-nm-thick TFMG (Zr50Cu27Al16Ni7) film with a 10nm titanium adhesion layer and a hard coating TiN film were coated on a substrate. Effects of these two types of films on the four-point fatigue property improvements of Ti–6Al–4V substrate were investigated. The fatigue life improved from 2.2×105cycles of uncoated sample to 3.7×106cycles, ~17 times, and 1.0×106 cycles, ~4.5 times, by TFMGs and TiN coatings, respectively, all under a stress of 675MPa. It is demonstrated that both TFMG and TiN films with high strength retarded the cracks propagated during fatigue cycles, resulting in increased fatigue life. The especially significant improvement from TFMGs was largely attributable to improved ductility and flexibility and to increased adhesion strength from the titanium adhesion layer. •Fatigue life of Ti 6–4 alloy is improved ~17 times by the metallic glass coating.•Metallic glass and TiN coatings on fatigue property improvement are compared.•Both films retard the crack propagation to different extents during fatigue test.•More improvements from the ductile metallic glass film are observed. 出版者： Elsevier B.V 出版日期： 2014-06-30 出處： Thin Solid Films, 2014-06, Vol.561, p.33-37 版權： 2013 Elsevier B.V. 識別號： ISSN: 0040-6090 識別號： EISSN: 1879-2731 識別號： DOI: 10.1016/j.tsf.2013.08.027
