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Precipitation of the δ-Ni 3 Nb phase in two nickel base superalloys
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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
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Laser aided direct metal deposition of Inconel 625 superalloy: Microstructural evolution and thermal stability
TL;DR: In this paper, a high power CO2 laser was used to create a molten pool on the Inconel 625 substrate into which an InConel 625 powder stream was delivered to create 3D objects.
Journal ArticleDOI
Effect of standard heat treatment on the microstructure and mechanical properties of selective laser melting manufactured Inconel 718 superalloy
TL;DR: Inconel 718 superalloy has been fabricated by selective laser melting technology (SLM), and its microstructure and mechanical properties were studied under solution+aging (SA) standard heat treatment, homogenization+solution+solutionsolution + aging (HSA), and as-fabricated conditions as discussed by the authors.
Journal ArticleDOI
Delta phase precipitation in Inconel 718
TL;DR: In this article, precipitation and dissolution kinetics of the δ-phase were studied in three wrought versions and one spray-formed (SF) version of the nickel alloy, Inconel 718.
Journal ArticleDOI
Microstructure and mechanical properties of Inconel 625 superalloy
TL;DR: In this article, the service-exposed Alloy 625 ammonia cracker tubes showed higher strength and lower ductility compared to the virgin material in the solution annealed state, and the dissolution of the Ni2(Cr,Mo)-phase exhibited significant influence upon yield strength (YS) but negligible effect on ductility.
Journal ArticleDOI
High temperature deformation of Inconel 718
TL;DR: In this article, the aging characteristics of Inconel 718 have been studied and the effect of the particles on the deformation mechanism and particularly on the softening mechanism of softening mechanisms.
References
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Observations on intermetallic compound and carbide precipitation in two commercial nickel-base superalloys
TL;DR: In this paper, an electron microscope study has been made of precipitation in two commercial nickel-base superalloys, showing that Alloy C263 is strengthened by the precipitation of fine dispersions of coherent γ', and Alloy M23C6 precipitation occurs at grain boundaries.
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