The Impact of Damage in Anneling Inconel 718 on Hardness Measured by the Vickers Method

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Abstract

In the previous work [1] it was shown that strain hardening had considerable impact on the hardness of Inconel 718. In order to verify the weakening of the material associated with the damage mechanism in the tested material, the hardness tests were performed on the stretched specimen which was subsequently heat treated. The tests revealed that, after heat treatment, the measured hardness was reduced with an increasing degree of the plastic deformation present prior to heat treatment.

[1] Malicki, M. & Madejski, B. (2015). The Impact of Damage in Inconel 718 on Hardness Measured by the Vickers Method. Fatigue of Aircraft Structures, 2015(7), pp. 69-79. Retrieved from doi:10.1515/fas-2015-0012.

[2] Lemaitre, J. (1996). A Course on Damage Mechanics. Springer-Verlag Berlin Heidelberg.

[3] Lemaitre, J. & Desmorat, R. (2005). Engineering Damage Mechanics. Springer-Verlag Berlin Heidelberg.

[4] Mkaddem, A., Bahloul, R., Dal Santo, P. & Potiron, A. (2006). Experimental characterisation in sheet forming processes by using Vickers micro-hardness technique. Journal of Materials Processing Technology, 180(2006), 1-8.

Fatigue of Aircraft Structures

The Journal of Institute of Aviation

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