Journal ArticleDOI
Precipitation of the δ-Ni 3 Nb phase in two nickel base superalloys
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TLDR
In this article, the precipitation of the metastable δ-Ni3Nb phase has been studied in two niobium bearing nickel base superalloys and the morphology and distribution of precipitates have been examined and the crystallographic orientation relationship between the austenite and the δ phases has been determined.Abstract:
The precipitation of the equilibrium δ-Ni3Nb phase has been studied in two niobium bearing nickel base superalloys—INCONEL 718 and INCONEL* 625—both of which are hardenable by the precipitation of the metastableγ″-Ni3Nb phase. The morphology and the distribution of precipitates have been examined and the crystallographic orientation relationship between the austenite and theδ phases has been determined. The nucleation of theδ phase at stacking faults within pre-existing δ" precipitates has been discussed.read more
Citations
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Dissertation
Modelling (D022) Precipitate Nucleation,Growth and Coarsening in the Nickel-baseSuperalloy 625
TL;DR: In this article, a model is developed to describe precipitation in Alloy 625, encompassing the concurrent homogeneous nucleation, growth and coarsening of different particles and allowing for them to be shape changing.
Journal ArticleDOI
Nonlinear surface wave measurements on aged and laser shock surface-treated Inconel 718 superalloy
Vania M. Rodríguez-Herrejón,Alberto Ruiz,Carlos Rubio-González,Víctor H. López-Morelos,Jin-Yeon Kim,Laurence J. Jacobs +5 more
TL;DR: In this article, the behavior of the nonlinearity parameter (βR) measured using the second harmonic generation of Rayleigh surface waves propagating in the free surface of aged Inconel 718 (IN 718) superalloy specimens with and without laser shock processing (LSP).
Journal ArticleDOI
The roles of thermal mechanical treatment and δ phase in the stress corrosion cracking of alloy 718 in primary water
TL;DR: In this paper, 11 variants of the precipitation-hardened alloy 718 were tested for stress corrosion cracking (SCC) resistance in a simulated pressurized water reactor primary water environment, and the optimized grade had the lowest SCC susceptibility, while more traditional thermal-mechanical treatment exhibited the highest.
Journal ArticleDOI
Criteria for hydrogen-assisted crack initiation in Ni-based superalloy 718
TL;DR: In this article , the tensile mechanical properties of Ni-based superalloy 718 uniformly precharged with ≈ 90 mass ppm hydrogen were investigated under a wide range of temperatures to shed light on the long-standing uncertainties surrounding the H-related embrittlement mechanisms of the material.
Journal ArticleDOI
Combined thermal desorption spectroscopy, hydrogen visualization, HRTEM and EBSD investigation of a Ni–Fe–Cr alloy: The role of hydrogen trapping behavior in hydrogen-assisted fracture
TL;DR: The role of hydrogen trapping behavior in hydrogen-assisted cracking in a Ni-Fe-Cr alloy has been investigated using thermal desorption spectroscopy (TDS), hydrogen visualization, and high-resolution microstructural characterization methods as mentioned in this paper .
References
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Book
A handbook of lattice spacings and structures of metals and alloys
W. B. Pearson,George H. Vineyard +1 more
TL;DR: The Handbook of Lattice spacings and structures of metals and alloys as discussed by the authors is a handbook of argumentative essay structure spacing and lattice plane model modified by the incorporation of thermodynamic functions appropriate to the f.c.
Book
Modern physical metallurgy
TL;DR: Modern Physical Metallurgy as mentioned in this paper describes the fundamental principles of physical metallurgy and the basic techniques for assessing microstructure and provides a balanced coverage of properties, characterization, phase transformations, crystal structure, and corrosion not available in other texts.
Book ChapterDOI
Configurational Thermodynamics of Solid Solutions
TL;DR: In this article, a review of theoretical models applicable to concentrated solid solutions is presented, focusing on concentrated solutions because dilute ones can be considered as special cases and because the interesting effects of clustering and ordering are most apparent at high solute concentrations.
Journal ArticleDOI
Precipitation of γ in the γ′of nickel-base superalloys
Journal ArticleDOI
Heat treatment of 706 alloy for optimum 1200 °F stress-rupture properties
TL;DR: In this article, a heat treatment for 706 alloy was developed which effectively optimizes the 1200°F stress-rupture properties of the alloy by precipitation of globular to plate-like Ni3Cb/Ni3Ti at the grain boundaries in conjunction with maintaining a fine as-forged grain structure.
Related Papers (5)
Morphology of y’ and y” precipitates and thermal stability of inconel 718 type alloys
R. Cozar,André Pineau +1 more