摘要： In order to improve the fatigue life of high strength aluminum alloy, a protection coating with 200nm Zr-based metallic glass thin film (MGTF) coupled with 50nm titanium thin film buffer layer was coated on the 7075-T6 aluminum alloy by DC sputtering. The results of four-point-bending fatigue test revealed that the fatigue life of 7075-T6 aluminum alloy with Zr-based MGTF could be improved by 30 times at a stress level of 250MPa. The improvement of Zr-based MGTF coated samples in fatigue limit was 235MPa (56.7% increase) in comparison with 150MPa for the uncoated samples. The superior mechanical properties of Zr-based MGTF, such as high strength and good bending ductility, lower surface roughness, good adhesion between the film and the substrate, and high compressive residual stress are the key factors to improve the fatigue resistance of the coated aluminum alloy. •Metallic glass thin film (MGTF) coatings sputtered on high strength aluminum alloy.•30-Time improvement of fatigue life of MGTF-coated samples at 250MPa.•Fatigue limit of MGTF-coated samples is 56% higher than the bare one.•Lower surface roughness plays an important role to improve fatigue life.•Compressive residue stress is the key to restrict fatigue cracks. 出版者： Amsterdam: Elsevier B.V 出版日期： 2013-10-01 出處： Thin solid films, 2013-10, Vol.544, p.331-334 版權： 2013 Elsevier B.V. 版權： 2014 INIST-CNRS 識別號： ISSN: 0040-6090 識別號： EISSN: 1879-2731 識別號： DOI: 10.1016/j.tsf.2013.02.104 識別號： CODEN: THSFAP
