Fatigue behavior of PVD coated Ti-6Al-4V alloy

Author(s)

Costa, M. Y. P. ^[1] ; Venditti, M. L. R. ^[1] ; Cioffi, M. O. H. ^[1] ; Voorwald, H. J. C. ^[1] ; Guimaraes, V. A. ^[1] ; Ruas, R. ^[2]

Affiliation

^[1] Univ Estadual Paulista, Fac Engn Guaratingueta, Mat & Technol Dept, Fatigue & Aeronaut Mat Res Grp, BR-12516410 Guaratingueta, SP - Brazil

^[2] Brasimet Revestimentos PVD Ind SA, BR-04795912 Sao Paulo - Brazil

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL OF FATIGUE; v. 33, n. 6, p. 759-765, JUN 2011.
• Web of Science Citations: 28

Abstract

The aim of the present work is to identify an environmentally clean coating process that will present lower influence in the Ti-6Al-4V fatigue strength. Axial fatigue tests of Ti-6Al-4V alloy TiN, CrN and WC:H (tungsten containing diamond-like carbon) Physical Vapor Deposition (PVD) coated was evaluated. Decrease in fatigue life was observed for coated specimens in comparison to base metal. Scanning Electron Microscopy technique was used to observe crack origin sites and coating thickness. DLC coating provides higher Ti-6Al-4V alloy PVD coated fatigue strength due to lower defects presence and the chromium interlayer, which acts as a barrier to fatigue crack propagation. (C) 2010 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 06/02121-6 - Composite processing by RTM
• Grantee: Maria Odila Hilário Cioffi
• Support Opportunities: Research Grants - Young Investigators Grants