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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Journal ArticleDOI
Effect of intermediate heat treatment temperature on microstructure and notch sensitivity of laser solid formed Inconel 718 superalloy
TL;DR: In this paper, the effect of IHT temperature on microstructure, tensile property and notch sensitivity of LSFed Inconel 718 superalloy at 500 °C were investigated.
Journal ArticleDOI
Fatigue Bending Behavior of Cold-Sprayed Nickel-Based Superalloy Coatings
A. Silvello,A. Silvello,Pasquale Cavaliere,Antonella Rizzo,Daniele Valerini,S. Dosta Parras,I. Garcia Cano +6 more
TL;DR: In this paper, the microstructural and mechanical properties of IN625 cold-sprayed coatings on V-notched carbon steel substrate were analyzed and the results achieved demonstrate that cold spray deposition and repair can contribute to resistance and to the increase in the global fatigue life of cracked structures.
Journal ArticleDOI
Effect of microstructural constituents on mechanical properties and fracture toughness of Inconel 718 with anomalous deformation behavior at 650 °C
TL;DR: In this article, the Inconel 718 superalloy was subjected to five different heat treatment schedules to develop five different microstructures for studying the effect of γ', γ'' and δ phases on mechanical properties of IN-718 at room temperature and 650°C.
Journal ArticleDOI
Defect tolerance and hydrogen susceptibility of the fatigue limit of an additively manufactured Ni-based superalloy 718
Kevinsanny,Saburo Okazaki,Osamu Takakuwa,Yuhei Ogawa,Yusuke Funakoshi,Hideto Kawashima,Saburo Matsuoka,Hisao Matsunaga +7 more
TL;DR: In this paper, the sensitivity of Ni-based superalloy 718 samples to surface finishing conditions and solute hydrogen was investigated via a series of tension-compression fatigue tests.
Journal ArticleDOI
Precipitation of η phase and its effects on stress rupture properties of K4750 alloy
TL;DR: In this article, the authors investigated the precipitation of η phase and its effects on stress rupture properties of K4750 alloy and found that thin plate-like η phases were firstly precipitated at grain boundaries and around MC carbides, then grew into grain interiors to form a Widmanstadter morphology.
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.
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