Aging precipitation behavior and mechanical properties of Inconel 617 superalloy
Yan Guo,Bohan Wang,Shufang Hou +2 more
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TL;DR: Aging precipitation behavior and mechanical properties of Inconel 617 superalloy aged at 760 °C for up to 10000 h were investigated in this paper, where the carbide particles precipitated both at the grain boundaries and within grains, and the γ′ phase particles were situated at intragranular sites in the process of aging.
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Abstract: Aging precipitation behavior and mechanical properties of Inconel 617 superalloy aged at 760 °C for up to 10000 h were investigated. The results showed that the precipitates of the aged alloy are M
23C6 and M
6C carbides and γ′ phase. The carbide particles precipitated both at the grain boundaries and within grains, and the γ′ phase particles were situated at intragranular sites in the process of aging. The carbide particles were discontinuously dispersed at grain boundaries after aging for 3000 h, while after aged for 5000 h the carbide particles are merged. The precipitates inside grains remained stable even after aging for 10000 h. The hardness was increased for the alloy aged for 300 h up to 3000 h, which was resulted primarily from the precipitation of carbides as discrete particles both at the grain boundaries and inside grains. Small quantity γ′ precipitates were formed inside grains, to some extent, which contributed to an enhanced hardness. However, a decrease of the hardness was observed after aging for 5000 h. A significant drop in toughness of the alloy aged for 300 h was attributed to the reduction of the bonding interface strength when carbides precipitated at grain boundaries. Thereafter, the toughness decreased slowly with the prolonged aging time. The high temperature tensile properties of the aged alloy are rather stable even aged for 300–3000 h.
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Citations
Weld overlay coating of Inconel 617 M on type 316 L stainless steel by cold metal transfer process
Paulson Varghese,Paulson Varghese,E. Vetrivendan,Manmath Kumar Dash,S. Ningshen,S. Ningshen,M. Kamaraj,U. Kamachi Mudali +7 more
TL;DR: In this paper, a study of microstructure and volumetric dilution of cold metal transfer (CMT) clad of Nickel based super alloy, Inconel 617M on type 316L stainless steel (SS) substrate was carried out.
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Formation of Lamellar Carbides in Alloy 617-HAZ and Their Role in the Impact Toughness of Alloy 617/9%Cr Dissimilar Welded Joint
TL;DR: In this article, the relationship between the microstructure and impact toughness, especially the formation of the lamellar carbides and its effect on the impact toughness of the heat-affected zone of Alloy 617 (Alloy 617-HAZ), was systematically investigated.
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Behavior of M23C6 phase in Inconel 617B superalloy during welding
TL;DR: In this paper, the room/high temperature mechanical property of the Inconel 617B joined by multi-layer narrow gap tungsten arc welding technology (NG-TIG) is investigated, and thermal simulation is utilized to reveal the behavior of M23C6 phase in the superalloy during welding.
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Evolution of carbides and its characterization in HAZ during NG-TIG welding of Alloy 617B
TL;DR: In this paper, the microstructure characterization and carbides evolution under different thermal cycle in narrow-gap tungsten inert gas welding (NG-TIG) on Alloy 617B were investigated.
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Phase transformation of alloy 617B during 10000 h aging: An element redistribution-related process
TL;DR: In this article, the phase transformation characteristics of alloy 617B were investigated in the temperature range of 600-800°C for up to 10000h using a combination of scanning electron microscopy (SEM) and precise chemical analysis.
29
References
Microstructure of Long-Term Aged IN617 Ni-Base Superalloy
TL;DR: The microstructure of the Ni-base superalloy IN617 that had undergone prolonged aging (approximately 65,000 hours) at a series of temperatures from 482 °C to 871 °C has been characterized by microhardness measurements, optical microscopy, scanning electron microscopy (SEM), and transmission electron microscope (TEM) Cr23C6, Mo-rich eta-M6C, and Ti(C,N) constitute the major primary coarse precipitates both within the grains and along the grain boundaries as mentioned in this paper.
195
Alloying effects on creep and oxidation resistance of austenitic stainless steel alloys employing intermetallic precipitates
Yukinori Yamamoto,Masao Takeyama,Zhaoping Lu,C.T. Liu,Neal D. Evans,Philip J. Maziasz,Michael P. Brady +6 more
TL;DR: In this article, the authors studied the viability of Fe-rich austenitic stainless alloys strengthened by intermetallic phases and found that the addition of Si helped to refine and stabilize the size of particles, resulting in finer and denser Fe{sub 2}Nb dispersion than that in the base alloy.
144
Investigation on precipitation phenomena of Ni–22Cr–12Co–9Mo alloy aged and crept at high temperature
TL;DR: In this article, the authors used light optical, scanning electron and transmission electron microscopy to detect micro-structural modification in specimens exposed to high temperature and found that the major microstructural features were identified to be the presence of inter-and/or intragranular particles ((Cr,Mo,Fe) 23 C 6 and other types of carbides, δ -Ni 3 Mo and γ ′-Ni 3 (Al,Ti)) that clearly played an important role in the mechanical behaviour of the alloy.
62
Precipitate Redistribution during Creep of Alloy 617
Scott Schlegel,Scott Schlegel,Sharla Hopkins,Evan Young,James I. Cole,T.M. Lillo,Megan Frary +6 more
TL;DR: In this paper, electron backscatter diffraction (EBSD) and energy-dispersive spectroscopy (EDS) were used to analyze the microstructure of 617 after creep testing at 900 °C and 1000 °C.
Experimental investigation and thermodynamic calculation on phase precipitation of inconel 740
TL;DR: In this paper, a nickel-based superalloy INCONEL 740 was developed for application in ultra-supercritical superheater tubers above 750°C and the precipitation behaviors of η phase and γ′ particles were investigated through experimental study and phase computation.
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