Strain induced directional coarsening in nickel based superalloys: Investigation on kinetics using the small angle neutron scattering (SANS) technique

Journal Article · Fri Aug 01 00:00:00 EDT 1997 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(97)00035-9· OSTI ID:532889

Veron, M; Bastie, P ^[1]

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1. UMR CNRS, Saint Martin d`Heres (France)

Using the small angle neutron scattering technique, the authors have observed rafting in nickel based single crystal superalloys. Kinetics of morphological evolution of the precipitates have been studied in situ. Therefore the authors used a special furnace designed for the ageing of prestrained specimens under a neutron beam. The evolution of both the precipitate aspect ratio and the distance between precipitates confirms the importance of strain in the directional coarsening process. Results are presented and discussed regarding kinetics and microstructural aspects. In such conditions, rafts seem to be different from those obtained after a creep test.

• OSTI ID: 532889
• Journal Information: Acta Materialia, Vol. 45, Issue 8; Other Information: PBD: Aug 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MICROSTRUCTURE
NICKEL BASE ALLOYS
MONOCRYSTALS
STRAINS
PRECIPITATION
AGING
SMALL ANGLE SCATTERING
NEUTRONS
KINETICS