Nickel-Based Superalloys for Advanced Turbine Engines: Chemistry, Microstructure and Properties
Tresa M. Pollock,Sammy Tin +1 more
Reads0
Chats0
TLDR
The chemical, physical, and mechanical characteristics of nickel-based superalloys are reviewed with emphasis on the use of this class of materials within turbine engines as mentioned in this paper, and the role of major and minor alloying additions in multicomponent commercial cast and wrought super-alloys is discussed.Abstract:
The chemical, physical, and mechanical characteristics of nickel-based superalloys are reviewed with emphasis on the use of this class of materials within turbine engines. The role of major and minor alloying additions in multicomponent commercial cast and wrought superalloys is discussed. Microstructural stability and phases observed during processing and in subsequent elevated-temperature service are summarized. Processing paths and recent advances in processing are addressed. Mechanical properties and deformation mechanisms are reviewed, including tensile properties, creep, fatigue, and cyclic crack growth. I. Introduction N ICKEL-BASED superalloys are an unusual class of metallic materials with an exceptional combination of hightemperature strength, toughness, and resistance to degradation in corrosive or oxidizing environments. These materials are widely used in aircraft and power-generation turbines, rocket engines, and other challenging environments, including nuclear power and chemical processing plants. Intensive alloy and process development activities during the past few decades have resulted in alloys that can tolerate average temperatures of 1050 ◦ C with occasional excursions (or local hot spots near airfoil tips) to temperatures as high as 1200 ◦ C, 1 which is approximately 90% of the melting point of the material. The underlying aspects of microstructure and composition that result in these exceptional properties are briefly reviewed here. Major classes of superalloys that are utilized in gas-turbine engines and the corresponding processes for their production are outlined along with characteristic mechanical and physical properties.read more
Citations
More filters
Polycrystalline γ(Ni)γ(Ni 3 Al)-δ(Ni 3 Nb) eutectic Ni-base superalloys
TL;DR: In this article, a matrix of alloys spanning a broad range of alloy compositions were examined to improve our understanding of various alloying effects on the solidification behavior and as-cast microstructure of multi-component!/!"-# eutectic alloys.
Journal ArticleDOI
Mapping the creep life of nickel-based SX superalloys in a large compositional space by a two-model linkage machine learning method
TL;DR: In this paper , a two-model linkage method was developed to predict the creep life of nickel-based single crystal superalloys through a data-driven machine learning approach, based on a small dataset collected from literatures.
Journal ArticleDOI
Microstructural evolution during high-temperature tensile creep at 1,500°C of a MoSiBTiC alloy
TL;DR: In this paper, microstructural evolution in the TiC-reinforced Mo-Si-B-based alloy during tensile creep deformation was investigated via scanning electron microscope-backscattered electron diffraction (SEM-EBSD) observations.
Journal ArticleDOI
Analysis of Microstructure and Mechanical Properties in As-Built/As-Cast and Heat-Treated Conditions for IN718 Alloy Obtained by Selective Laser Melting and Investment Casting Processes
TL;DR: In this paper, new customized heat treatments for selective laser melted (SLM) parts in IN718 alloy were analyzed through the evaluation of the mechanical properties and advanced characterization of the phases and microstructure obtained in as-built condition and after the application of standard and tailored heat treatments.
Journal ArticleDOI
Thermally Induced Interdiffusion and Precipitation in a Ni/Ni3Al System
Cheng Sun,Enrique Martínez,Jeffery A. Aguiar,Alfredo Caro,James A. Valdez,Kevin Baldwin,Y. Xu,Blas P. Uberuaga,Osman Anderoglu,Stuart A. Maloy +9 more
TL;DR: In this article, the interdiffusion and precipitation behavior in a Ni/Ni3Al model system was investigated, and it was shown that Ni3Al intermetallic precipitates preferentially diffuse along the Ni-Ni 3Al interface, increasing the probability of precipitation.
References
More filters
Book
Dislocations in solids
TL;DR: In this article, Bertotti, Ferro, and Mazetti proposed a theory of dislocation drag in covalent crystals and formed a model of the formation and evolution of dislocations during irradiation.
Journal ArticleDOI
Creep resistance of CMSX-3 nickel base superalloy single crystals
Tresa M. Pollock,A.S. Argon +1 more
TL;DR: In this paper, the authors studied the effect of dislocation-free nickel base superalloy single crystals with high volume fractions of the γ′ phase on their deformation and found that the dislocation free precipitates are resistant to shearing by dislocations.
Journal ArticleDOI
The precipitation of topologically close-packed phases in rhenium-containing superalloys
Catherine M.F. Rae,Roger C. Reed +1 more
TL;DR: In this paper, the formation of topologically close-packed (TCP) phases due to the addition of solid solution strengtheners, such as rhenium, molybdenum and tungsten, has been studied.
Journal ArticleDOI
Dynamic recrystallization in nickel and nickel-iron alloys during high temperature deformation
M.J Luton,C.M. Sellars +1 more
TL;DR: In this paper, it is established from metallographic and flow stress observations that dynamic recrystallization occurs at strains greater than a critical value and results in a recrystized grain size which is determined entirely by the flow stress.
Journal ArticleDOI
Creep behaviour of Ni-base single-crystal superalloys with various γ' volume fraction
TL;DR: In this article, a third generation Ni-base single-crystal superalloy TMS-75 and its γ/γ " tie line alloys were designed to contain various volume fractions of γ, while the compositions of two individual phases were kept the same.