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
Gamma-gamma prime-gamma double prime dual-superlattice superalloys
P. M. Mignanelli,Nick Jones,Ed Pickering,Ed Pickering,Omdm Messé,Catherine M.F. Rae,Mark Hardy,Howard J. Stone +7 more
TL;DR: In this article, a new polycrystalline nickel-base superalloy that has exceptional strength and thermal stability has been reported, which can form both gamma prime and gamma double prime precipitates in comparable volume fractions, creating an unusual dual-superlattice microstructure.
Journal ArticleDOI
Effect of hot deformation on γ″ and δ phase precipitation of Inconel 718 alloy during deformation&isothermal treatment
Hongjun Zhang,Chong Li,Yongchang Liu,Yongchang Liu,Qianying Guo,Yuan Huang,Huijun Li,Jianxin Yu,Jianxin Yu +8 more
TL;DR: In this article, a deformation and isothermal treatment is applied to investigate the effect of hot deformation on precipitation of γ and δ phase in Inconel 718 alloy.
Journal ArticleDOI
Some features of anisothermal solid-state transformations in alloy 718
TL;DR: In this paper, an attempt to use differential thermal analysis to study anisothermal precipitation of both the stable delta and the metastable gamma-second phases during cooling of alloy Inconel 718 was made.
Journal ArticleDOI
Electron beam additive manufacturing of Inconel 718 alloy rods: Impact of build direction on microstructure and high-temperature tensile properties
Shi-Hai Sun,Yuichiro Koizumi,Tsuyoshi Saito,Kenta Yamanaka,Yunping Li,Yujie Cui,Akihiko Chiba +6 more
TL;DR: Inconel 718 alloy rods were fabricated by electron-beam melting (EBM), where the cylindrical axes (CAs) deviated from the build directions (BD) by 0°, 45°, 55°, and 90° as mentioned in this paper.
Proceedings ArticleDOI
Carbide Precipitation in Nickel Base Superalloys 718 and 625 and Their Effect on Mechanical Properties
TL;DR: Loria et al. as discussed by the authors investigated the precipitation of primary and secondary carbide phases in Alloy 718 and Alloy 625 with reference to their identity, distribution and morphology, and the influence of grain boundary carbide precipitation on the mechanical behaviour, especially the fracture mode, of these alloys.
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