2024
DOI: 10.1007/s11661-024-07504-7
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Al- and Ta-Modified Alloy 740 Superalloy Castings Produced in Non-vacuum Conditions—Microstructure and Selected Properties

Małgorzata Grudzień-Rakoczy,
Łukasz Rakoczy,
Sebastian Lech
et al.

Abstract: The work focuses on characterizing the microstructure and selected properties of Al- (1.3 or 2.8 wt pct) and Ta-modified (2 or 3 or 4 wt pct) Alloy 740 Ni-based superalloy after heat treatment. The observations and analyses were conducted using thermodynamic simulations, X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, steam oxidation, hardness, tensile, and stress rupture tests. The castings exhibit a typical dendritic structure, with the… Show more

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