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
Effects of temperature and strain rate on tensile properties and activation energy for dynamic strain aging in alloy 625
TL;DR: In this article, the effects of temperature and strain rate on the tensile properties of the solution-annealed alloy were examined in the temperature range of 300 to 1023 K, employing the strain rates in the range of 3 ×10−5 s−1 to 3×10−3 s− 1.
Journal ArticleDOI
Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of GH4169 Alloy Sheet at Room Temperature
TL;DR: In this paper, the mechanical properties of GH4169 alloy sheet after cold rolling (at 0, 10, 30, 50% and 70%) and solid solution were investigated and the results showed increases in the yield strength (YS) (0.2%) as well as the ultimate tensile strength (UTS) (UTS) when rolling reduction was increased.
Journal ArticleDOI
Effects of cold rolling on the precipitation kinetics and the morphology evolution of intermediate phases in Inconel 718 alloy
TL;DR: In this article, the effect of cold rolling on the precipitation kinetics of intermediate phases in Inconel 718 alloy was investigated and it was found that cold rolling promotes global transformation and the morphology of γ″-phase turns more globular with increasing temperature.
Journal ArticleDOI
Hot working characteristics and dynamic recrystallization of delta-processed superalloy 718
TL;DR: In this paper, the microstructural mechanisms of delta-processed superalloy 718 at various temperatures and strain rates were studied using the processing maps, and the results showed that there are two domains of dynamic recrystallization exhibited in the map: one occurring around 1050°C and 0.001 s−1 with a peak efficiency of 54%.
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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