Fatigue properties of ZK60 Mg alloy: Effects of thin film metallic glass coatings

Monday, April 10, 2017: 1:30 PM
Room 8 (Charleston Area Convention Center)
Prof. Jinn P. Chu , National Taiwan University of Science and Technology, Taipei, Taiwan
Mr. C. H. Chang , National Taiwan University of Science and Technology, Taipei, Taiwan
Prof. Peter K. Liaw , The University of Tennessee, Knoxville, TN
Mr. Chia-Chi Yu , National Taiwan University of Science and Technology, Taipei, Taiwan
Thin film metallic glasses (TFMGs) have been gaining a great interest in recent years owing to exceptional mechanical properties such as high strength, high toughness, large elastic limit as well as excellent wear and corrosion resistances. Hence, attention has been concentrated on the development of TFMGs for specific application in mechanical property enhancements.

In this study, we will present the fatigue behavior of ZK60 Mg alloy in bare and coated conditions. The coated samples are sputter deposited with 200-nm-thick Zr-based TFMG. Four-point-bending fatigue tests are carried out, which are loaded at various stresses at R ratio of 0.1 with a 10 Hz sinusoidal waveform. The results show that fatigue life of the TFMG-coated substrate is greatly improved by 24%. The reduction in the surface roughness after film depositions, good film adhesion to the substrate, and the high hardness of TFMGs are thought to play major roles for fatigue property enhancements.

See more of: Advances in Coatings and Surface Modification II
See more of: Technical Program