Journal
SCRIPTA MATERIALIA
Volume 136, Issue -, Pages 136-140Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.04.029
Keywords
Nickel alloys; Superalloy; Transmission electron microscopy
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Funding
- EPSRC/Rolls-Royce Strategic Partnership [EP/M005607/1, EP/H022309/1]
- EPSRC [EP/M005607/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M005607/1, 1146959] Funding Source: researchfish
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Improving the efficiency of gas turbine engines requires the development of new materials capable of operating at higher temperatures and stresses. Here, we report on a new polycrystalline nickel-base superalloy that has exceptional strength and thermal stability. These properties have been achieved through a four-element composition that can form both gamma prime and gamma double prime precipitates in comparable volume fractions, creating an unusual dual-superlattice microstructure. Alloying studies have shown that further property improvements can be achieved, and that with development such alloys may be suitable for future engine applications. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd.
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