Journal ArticleDOI
Precipitation of the δ-Ni 3 Nb phase in two nickel base superalloys
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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Journal ArticleDOI
Effect of Al and Ti on precipitation behaviour of γ” in cast alloy 625
TL;DR: In the smelting process of large castings, the addition of deoxidiser is bound to introduce other elements, such as Al and Ti as mentioned in this paper, and the influence of these elements on the precipita...
Journal ArticleDOI
Ultra-strong tungsten refractory high-entropy alloy via stepwise controllable coherent nanoprecipitations
TL;DR: In this paper , a stepwise controllable coherent nanoprecipitations (SCCP) is proposed to improve the tensile ductility of tungsten refractory high-entropy alloys.
Journal ArticleDOI
Stress Relaxation Behavior of GH4169 Alloy
TL;DR: In this paper, the relaxation properties of GH4169 alloy were studied contrastively at temperatures ranging from 600 oC to 700 °C and initial stress ranging from 550 MPa to 850 MPa.
Journal ArticleDOI
Formation mechanisms of coprecipitates in Inconel 718 Superalloys
TL;DR: In this paper , the authors used phase field simulations to analyze the individual and combined effects of concentration and coherency stress fields associated with a growing γ′ precipitate at different sizes on heterogeneous nucleation of γ″ on the surfaces of the particle and the coprecipitate configurations formed.
Journal ArticleDOI
Evolution of microstructure and δ phase in an aging-treated nickel-based superalloy during hot compression
TL;DR: In this article , a hot compression test was conducted on Ni3Nb to study the evolution of microstructure and δ phase in an aging-treated nickel-based superalloy, and the results indicated that the DRX fraction increases with the strain rising or the strain rate declining.
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