Nickel-Based Superalloys for Advanced Turbine Engines: Chemistry, Microstructure and Properties
Tresa M. Pollock,Sammy Tin +1 more
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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
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Quantitative prediction of the aged state of Ni-base superalloys using PCA and tensor regression
TL;DR: Even though PCA provides an effective tool for visualization and classification of data, the model built based on the TR algorithm is shown to have stronger prediction capability.
Journal ArticleDOI
Femtosecond pulsed laser ablation dynamics and ablation morphology of nickel based superalloy CMSX-4
TL;DR: In this article, pump-probe shadowgraphic imaging of single pulse femtosecond laser ablation was performed to investigate the dynamics of material removal during femto-cond laser machining of the intermetallic superalloy CMSX-4.
Journal ArticleDOI
Effect of tungsten concentration on microstructures of Co-10Ni-6Al-(0,2,4,6)W-6Ti (at%) cobalt-based superalloys
Peter J. Bocchini,Chantal K. Sudbrack,Daniel J. Sauza,Ronald D. Noebe,David N. Seidman,David C. Dunand +5 more
TL;DR: In this article, the effects of reducing the W concentration (and concomitantly mass density) of Co-10Ni-6Al-xW-6Ti at% Co-based superalloys, with a γ(f.c.) plus γ′(L1 2 ) microstructure, were investigated for a series of alloys with W concentrations of 6, at% (baseline alloy), 4 and 2, at % (W-reduced) and 0, at %(W-free).
Journal ArticleDOI
Vacancy mobility and interaction with transition metal solutes in Ni.
TL;DR: The mobility of the vacancies as a key factor in dislocation climb is only minimally influenced by the solute atoms within the dilute limit.
Journal ArticleDOI
Microstructure and grain growth direction of SRR99 single-crystal superalloy by selective laser melting
Jingjing Yang,Fangzhi Li,Aiqiong Pan,Huihui Yang,Chun-Yang Zhao,Wenpu Huang,Zemin Wang,Xiaoyan Zeng,Xinliang Zhang +8 more
TL;DR: In this article, the feasibility of manufacturing Nickel-based Single Crystal (SX) superalloys by selective laser melting (SLM) was investigated theoretically and experimentally, and the results showed that CET can be avoided during the whole process of SLM.
References
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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.
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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.
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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.
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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.
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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.