Saunders, S R J; Banks, J P (2001) Development of a test procedure for the measurement of thermal fatigue resistance of coatings. NPL Report. MATC(A)61

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Abstract

Thermal mechanical fatigue (TMF) is an important failure mechanism for coatings used in gas turbine engines. TMF resistance was assessed using a rig designed at NPL in which the sample was directly heated by passage of a large electrical current, and the strain was imposed using a hydraulic actuator. The test was carried out under strain control and heating rates of up to 140 °C per second could be achieved. The temperature strain cycles were controlled using Labview software. Two cycles have been simulated for industrial and aero use of gas turbines. MCrAlY and Pt diffusion coating systems have been investigated and tested to failure. Metallographic examination of the failed samples yielded information on the fracture process.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	MATC(A)61
Subjects:	Advanced Materials Advanced Materials > Surface Engineering
Last Modified:	02 Feb 2018 13:17
URI:	http://eprintspublications.npl.co.uk/id/eprint/2567

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