Reading: Application of the small punch test to evaluate the integrity of a cold spray titanium coating

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Conference Paper

Application of the small punch test to evaluate the integrity of a cold spray titanium coating

Authors:

A. Wong ,

Institute of Structural Materials, Swansea University, Bay Campus, Swansea, UK, SA1 8EN
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Y.L. Tan,

Institute of Structural Materials, Swansea University, Bay Campus, Swansea, UK, SA1 8EN
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M. Pilot,

Institute of Structural Materials, Swansea University, Bay Campus, Swansea, UK, SA1 8EN
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R.J. Lancaster,

Institute of Structural Materials, Swansea University, Bay Campus, Swansea, UK, SA1 8EN
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S.P. Jeffs,

Institute of Structural Materials, Swansea University, Bay Campus, Swansea, UK, SA1 8EN
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F. Li,

Rolls-Royce Singapore, 1 Seletar Aerospace Crescent, 797565 Singapore
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A.W.Y. Tan,

Nanyang Technological University, 50 Nanyang Ave, Singapore
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W. Sun,

Nanyang Technological University, 50 Nanyang Ave, Singapore
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E. Liu,

Nanyang Technological University, 50 Nanyang Ave, Singapore
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I. Mitchell

Rolls-Royce plc., P.O. Box 31, Derby, UK, DE24 8BJ
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Abstract

Metal Cold Spray (MCS) is currently under evaluation for its suitability for aerospace applications. However, before this technology can be implemented into the jet engine, the mechanical performance and structural integrity of this novel process must be fully understood. Limited data is currently available to determine key materials properties given the discrete and transient nature of a MCS component. Furthermore, it is extremely challenging to produce uniaxial test coupons that are truly representative of the in-service geometry. As such, the small punch (SP) test offers an attractive alternative, since miniature disc SP specimens can be extracted from localised discrete locations. This paper will report the findings from an experimental collaborative programme of work currently being undertaken by Swansea University, Rolls-Royce Singapore and Nanyang Technological University Corp Lab to understand the contrasting modes of failure in a Ti-6Al-4V coating sprayed on to a Ti-6Al-4V substrate, which is expected to have properties akin to a forged variant. This will include a series of SP tests to assess the integrity and performance across the substrate, bond line and coating. Results will be supported by additional microstructural and fractographic investigations.
How to Cite: Wong, A., Tan, Y.L., Pilot, M., Lancaster, R.J., Jeffs, S.P., Li, F., Tan, A.W.Y., Sun, W., Liu, E. and Mitchell, I., 2018. Application of the small punch test to evaluate the integrity of a cold spray titanium coating. Ubiquity Proceedings, 1(S1), p.47. DOI: http://doi.org/10.5334/uproc.47
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Published on 10 Sep 2018.
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