Gamma-gamma prime-gamma double prime dual-superlattice superalloys

DOI: 10.1016/j.scriptamat.2017.04.029

Authors: P. M. Mignanelli (University of Cambridge) , N. G. Jones (University of Cambridge) , E. J. Pickering (University of Cambridge; The University of Manchester) , O. M. D. M. Messe (University of Cambridge) , C. M. F. Rae (University of Cambridge) , M. C. Hardy (Rolls-Royce plc) , H. J. Stone (University of Cambridge)
Co-authored by industrial partner: Yes

Type: Journal Paper
Journal: Scripta Materialia , VOL 136 , PAGES 136 - 140

State: Published (Approved)
Published: July 2017
Diamond Proposal Number(s): 9270

Abstract: 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.

Journal Keywords: Nickel alloys; Superalloy; Transmission electron microscopy

Subject Areas: Materials


Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

Documents:
1-s2.0-S1359646217302051-main.pdf