Transient Liquid Phase Bonding of Newly Developed HAYNES 282 Superalloy

Ghoneim, A.; Ojo, O.A.

doi:10.1002/9781118495223.ch33

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…Such high temperature capability of Haynes ® 282 ® is possible due to the specific chemical composition and its relatively low γʹ content, which also assures its thermal stability [ 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. Also, this alloy features improved formability and weldability as a consequence of the lowered content of γʹ phase in comparison with, e.g., Waspaloy [ 9 , 10 , 11 , 12 , 13 , 14 ]. Mechanical properties are maintained at required levels despite low amounts of Al and Ti.…”

Section: Introductionmentioning

confidence: 99%

Microstructure of Haynes® 282® Superalloy after Vacuum Induction Melting and Investment Casting of Thin-Walled Components

et al. 2013

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The aim of this work was to characterize the microstructure of the as-cast Haynes® 282® alloy. Observations and analyses were carried out using techniques such as X-ray diffraction (XRD), light microscopy (LM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray spectroscopy (EDS), wave length dispersive X-ray spectroscopy (WDS), auger electron spectroscopy (AES) and electron energy-loss spectrometry (EELS). The phases identified in the as-cast alloy include: γ (gamma matrix), γʹ (matrix strengthening phase), (TiMoCr)C (primary carbide), TiN (primary nitride), σ (sigma-TCP phase), (TiMo)2SC (carbosulphide) and a lamellar constituent consisting of molybdenum and chromium rich secondary carbide phase together with γ phase. Within the dendrites the γʹ appears mostly in the form of spherical, nanometric precipitates (74 nm), while coarser (113 nm) cubic γʹ precipitates are present in the interdendritic areas. Volume fraction content of the γʹ precipitates in the dendrites and interdendritic areas are 9.6% and 8.5%, respectively. Primary nitrides metallic nitrides (MN), are homogeneously dispersed in the as-cast microstructure, while primary carbides metallic carbides (MC), preferentially precipitate in interdendritic areas. Such preference is also observed in the case of globular σ phase. Lamellar constituents characterized as secondary carbides/γ phases were together with (TiMo)2SC phase always observed adjacent to σ phase precipitates. Crystallographic relations were established in-between the MC, σ, secondary carbides and γ/γʹ matrix.

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Section: Introductionmentioning

confidence: 99%

Microstructure of Haynes® 282® Superalloy after Vacuum Induction Melting and Investment Casting of Thin-Walled Components

et al. 2013

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“…Since the unique high temperature properties are governed by the nanometre sized '-phase, it is of great importance to understand the kinetics of precipitation. This is not only of importance when designing or optimizing the heat treatment of this and similar alloys, but is also of interest when processing the alloy or using it in various types of manufacturing processes [2,[7][8][9][10]. The ' hardening alloys are known to harden rapidly, which in turn creates difficulties during primary (e.g.…”

Section: Introductionmentioning

confidence: 99%

Correlation of precipitate evolution with Vickers hardness in Haynes® 282® superalloy: In-situ high-energy SAXS/WAXS investigation

Haas¹,

Andersson

Fisk

et al. 2018

Materials Science and Engineering: A

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The aim of this work is to characterize the precipitation kinetics in Haynes® 282® superalloys using insitu high-energy Small Angle X-ray Scattering (SAXS) together with Wide Angle X-ray Scattering (WAXS). The phases identified by WAXS include (matrix), ' (hardening precipitates), MC (metallic carbides), and M 23 C 6 /M 6 C (secondary metallic carbides). The-precipitates are spheroids with a diameter of several nanometres, depending on the temperature and ageing time. From the SAXS data, quantitative parameters such as volume fraction, number density and inter-particle distance were determined and correlated with ex-situ Vickers microhardness measurements. The strengthening components associated with precipitates and solid solutions are differentiated using the measured Vickers microhardness and SAXS model parameters. A square root dependence between strengthening attributable to the precipitates and the product of volume fraction and mean precipitate radius is found. The solid solution strengthening component correlates with the total volume fraction of precipitates.

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Transient Liquid Phase Bonding of Newly Developed HAYNES 282 Superalloy

Cited by 2 publications

References 8 publications

Microstructure of Haynes® 282® Superalloy after Vacuum Induction Melting and Investment Casting of Thin-Walled Components

Microstructure of Haynes® 282® Superalloy after Vacuum Induction Melting and Investment Casting of Thin-Walled Components

Correlation of precipitate evolution with Vickers hardness in Haynes® 282® superalloy: In-situ high-energy SAXS/WAXS investigation

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