Affiliation:
1. Institut Pprime, UPR 3346, CNRS, ISAE-ENSMA, Université de Poitiers, Futuroscope Cedex, France
Abstract
Although nickel-based superalloys are widely used in the industry, their response to shock loading is still rarely investigated. Here, the impacts of laser-launched flyers were used to study the dynamic behavior of a Rene 65 superalloy under shock pressures of about 10 GPa at very high strain rates of about 106 s−1. Three types of samples, wrought or additively manufactured (laser powder bed fusion) and subjected to different heat treatment conditions, were investigated. These experiments allowed the measurement of the Hugoniot elastic limit (compressive yield strength) and the spall (tensile) strength, both in upper ranges compared with the most common metals. Post-recovery analyses involving various techniques provided insight into dynamic failure with a combination of transgranular ductile fracture and intergranular cracks with preferential nucleation sites, strongly dependent on the different microstructures related to fabrication routes and thermal treatments.
Funder
Agence de l'innovation de defense
Investissements d'Avenir EQUIPEX GAP
Contrat de Plan Etat-RegionNouvelle-Aquitaine
Fonds européen de développement régional
Subject
General Physics and Astronomy
Reference53 articles.
1. J. A. Heaney, M. L. Lasonde, and A. M. Powell, “Development of a new cast and wrought alloy (Rene 65) for high temperature disk applications,” in 8th International Symposium on Superalloy 718 and Derivatives (The Minerals, Metals & Materials Society, 2014), p. 11.
2. The Superalloys
3. Nickel-Based Superalloys for Advanced Turbine Engines: Chemistry, Microstructure and Properties
4. A. Wessman, A. Laurence, J. Cormier, P. Villechaise, T. Billot, and J. M. Franchet, “Thermal stability of cast and wrought alloy Rene 65,” in Proceedings of the 13th International Symposium on Superalloys (The Minerals, Metals & Materials Society, 2016), pp. 793–800.
5. High temperature fatigue of nickel-base superalloys – A review with special emphasis on deformation modes and oxidation
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献