Effect of microarc oxidation coating on fatigue performance of Ti-Al-Zr alloy
Effect of microarc oxidation coating on fatigue performance of Ti-Al-Zr alloy
复制标题
微弧氧化涂层对Ti-Al-Zr合金疲劳性能的影响
DOI：
10.1016/j.apsusc.2009.06.038
复制
发表时间：
2009-07-30
影响因子：
6.7
通讯作者：
Jia, D. C.
中科院分区：
文献类型：
--
作者：
Wang, Y. M.;Zhang, P. F.;Jia, D. C.
Ceramic coatings of different thickness were fabricated on Ti6Al2Zr1Mo1V alloy by microarc oxidation (MAO), and the effect of the coating on fatigue life was evaluated by 810 Material Test System. The microstructure, phase and chemical composition of the coatings were determined by SEM, XRD and EDS techniques. The coating mainly consists of rutile and a small amount of anatase TiO(2). With oxidation time ranging from 10 to 30 min, the coating thickness increases from 13 to 25 mu m, while the interface between coating and substrate becomes more zigzag, characterized by increasing overgrowth regions of coating into substrate. Under the same cyclic stress of 750 MPa, the fatigue life decreases from 2.08 x 10(6) cycles for uncoated specimen to about 3 x 10(4) cycles for microarc oxidized specimen. Under the cyclic stress, the thicker the coating, the more cracks initiate in the overgrowth regions of coating into substrate near the interface, which are considered as the notch sites of stress concentration to induce the crack initiation, also is the key factor to cause the facture. (C) 2009 Elsevier B.V. All rights reserved.
