Precipitation and Room Temperature Deformation Behaviour of Inconel 718

Sundararaman, M.; Mukhopadhyay, P.; Banerjee, S.

doi:10.7449/1994/superalloys_1994_419_440

Cited by 38 publications

(23 citation statements)

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“…The second one, is the metastable γ' (Ni 3 (Al, Ti, Nb)) phase [10], which has a cuboidal or spherical form. After optimal heat treatment, the volume fraction of these two phases is 15-17 vol.% [15], the volume fraction of γ'' being three to four times larger than that of γ' [16]. After an ageing or a heat treatment, between 650°C and 950°C, δ-Ni 3 Nb phases, the [28,30,35].…”

Section: Microstructure Of In 718 Alloys Produced By Additive Manufacmentioning

confidence: 99%

High temperature oxidation of IN 718 manufactured by laser beam melting and electron beam melting: Effect of surface topography

2018

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A B S T R A C TThe oxidation behaviour of IN 718 alloys produced by laser beam melting and electron beam melting was compared to that of the wrought alloy at 850°C in laboratory air. Oxide scales of all alloys were similar in nature and morphology with small differences due to powder particles sintered on the surface of additive manufacturing parts. Nevertheless, major differences in surface topography were noticed, these could affect surface area estimations and consequentlymass gain estimations. A quantitative correlation was determined between apparent parabolic rate constant and surface area.

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Section: Microstructure Of In 718 Alloys Produced By Additive Manufacmentioning

confidence: 99%

High temperature oxidation of IN 718 manufactured by laser beam melting and electron beam melting: Effect of surface topography

2018

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“…A debate for the presence of a transition at this temperature is also for Inconel 718 -which shows the same behavior at this temperature. Several authors [7][8][9][10] debate on the γ' precipitation starts temperature.…”

Section: Dilatometric Analysismentioning

confidence: 99%

Preliminary research for using Rene 41 in confectioning extrusion dies

Schwartz

Ciocoiu

Gheorghe

et al. 2015

WIT Transactions on Engineering Sciences

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The dies used for copper/brass hot extrusion made of tool steels failed after a small number of runs. The die must be either refurbished (reconditioned) either discarded or replaced by a new die. These results are not satisfactory for a good production, so we took into account a new alloy to use for confectioning the dies. Before the first die was readily made, an experiment was performed to justify the migration to this new alloy.Heating cycles are performed to observe microstructure evolution in Rene 41. These heating cycles mimic the usage conditions of the die in service, except the stresses during extrusion. The alloy at specific number of cycles is analyzed by optic and electron microscopy (SEM), X-ray diffraction analysis (XRD), Vickers microhardness investigations and dilatometric tests.Minor changes occurred in the microstructure: M23C6 carbides appeared at grain boundary and depleted adjacent regions in alloying elements.

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“…Some authors [1,2] affirm that ␥ and ␥ particles precipitate between 550 and 660 • C at large aging times, while others says that they can precipitate between 700 and 900 • C at short aging times as far as the relation (Ti + Al)/Nb = 0.66 (in at.%) is maintained. If this ratio goes up to 0.8, ␥ precipitation starts before than the ␥ one [3,4].…”

Section: Introductionmentioning

confidence: 96%