Effects of surface roughness on bonding behavior of cold spray ti6al4v coatings

Sun, Wen, Tan, Adrian Wei Yee, Marinescu, Iulian and Liu, Erjia (2017) Effects of surface roughness on bonding behavior of cold spray ti6al4v coatings. In Additive Manufacturing; Materials. vol. 2, The American Society of Mechanical Engineers.. (doi:10.1115/MSEC2017-2753).

Record type: Conference or Workshop Item (Paper)

Abstract

In this study, a penitential additive manufacturing method-cold spray was used to deposit Ti6Al4V powders onto Ti6Al4V substrates with different surface roughness by using a high pressure cold spray system. The coating quality was good with limited porosity and without phase transition. Interface bonding behavior between coating and substrate was studied, which indicated that smoother substrate surface would increase the bonding strength. Bending test showed that all the coated samples started to delaminate before substrate failure and smoother surface samples could resist higher stress than the rougher surface samples.

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Published date: 24 July 2017

Additional Information: Funding Information: This work was financially supported by the Singapore National Research Foundation, Rolls-Royce, and Nanyang Technological University, with the NRF-RR-NTU research grant number of M-RT3.1. Authors also thank Rolls-Royce team members Anna Tai and Nicolas Weeks for their contributions to this work. Publisher Copyright: © Copyright 2017 ASME.

Venue - Dates: ASME 2017 12th International Manufacturing Science and Engineering Conference, MSEC 2017 collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing, , Los Angeles, United States, 2017-06-04 - 2017-06-08

Keywords: Bonding behavior, Cold spraying, Surface roughness, Ti6Al4V coating