Microstructure of Haynes® 282® Superalloy after Vacuum Induction Melting and Investment Casting of Thin-Walled Components
Artikel i vetenskaplig tidskrift, 2013

Abstract: 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.

Haynes® 282®



investment casting

vacuum induction melting


Hubert Matysiak

Politechnika Warszawska

Malgorzata Zagorska

Politechnika Warszawska

Joel Håkan Andersson

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Alicja Balkowiec

Politechnika Warszawska

Rafal Cygan

Polskie Zaklady Lotnicze Rzeszow S.A.

Marcin Rasinski

Politechnika Warszawska

Marcin Pisarek

Institute of Physical Chemistry of the Polish Academy of Sciences

Mariusz Andrzejczuk

Politechnika Warszawska

Krzysztof Kubiak

Politechnika Rzeszowska

Krzysztof J. Kurzydlowski

Politechnika Warszawska


1996-1944 (ISSN)

Vol. 6 5016-5037


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Metallurgi och metalliska material