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

Materials

Hubert Matysiak¹  Malgorzata Zagorska⁵  Joel Andersson²  Alicja Balkowiec⁵  Rafal Cygan³  Marcin Rasinski⁵  Marcin Pisarek⁶  Mariusz Andrzejczuk⁵  Krzysztof Kubiak⁴ 

[1] Functional Materials Research Center, Warsaw University of Technology, Woloska 141, Warsaw 02-507, Poland;Guest, Keen and Nettlefolds (GKN) Aerospace Engine Systems Sweden, Trollhättan S-46181, Sweden; E-Mail:;Wytwornia Sprzetu Komunikacyjnego, “Polskie Zaklady Lotnicze Rzeszow” S.A., Hetmanska 120, Rzeszow 35-078, Poland; E-Mail:;Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Al. Powstancow Warszawy 8, Rzeszow 35-959, Poland; E-Mail:;Faculty of Materials Science and Engineering, Warsaw University of Technology, Woloska 141, Warsaw 02-507, Poland; E-Mails:;Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland; E-Mail:

关键词: Haynes^® 282^®;    vacuum induction melting;    investment casting;    superalloy;    microstructure;   

DOI  :  10.3390/ma6115016

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.