Published November 2009 | Version v1
Journal article Metadata-only

Multimodal size distributions of γ' precipitates during continuous cooling of UDIMET 720 Li

Creators

  • 1. Institute for Materials Science and Welding, Graz University of Technology, Kopernikusgasse 24, A-8010 Graz (Austria)
  • 2. Christian Doppler Laboratory for 'Early Stages of Precipitation', Vienna University of Technology, Favoritenstrasse 9-11, A-1040 Vienna (Austria)
  • 3. Research Institute for Electron Microscopy, Graz University of Technology, Steyrergasse 17, A-8010 Graz (Austria)
  • 4. Institute of Materials Science and Technology, Vienna University of Technology, Favoritenstrasse 9-11, A-1040 Vienna (Austria)
  • 5. Materials Center Leoben Forschung GmbH, Roseggerstrasse 12, A-8700 Leoben (Austria)

Description

The technological properties of many nickel-based superalloys originate in the morphology and distribution of Ni3(Al, Ti) particles (γ' precipitates). Starting from the solution-annealed condition, the distribution and the morphology of γ' precipitates are investigated experimentally during continuous cooling of the nickel-base superalloy UDIMET 720 Li. Characterization of the precipitates is carried out by scanning electron microscopy and energy-filtered transmission electron microscopy investigations. Depending on cooling rate, monomodal, bimodal and even trimodal size distributions are observed. The experimental observations of the size distributions are confirmed by numerical simulations of the γ' precipitation kinetics. The theoretical background for occurrence of multimodal size distributions during continuous cooling is discussed.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.actamat.2009.08.002

Additional details

Identifiers

DOI
10.1016/j.actamat.2009.08.002;
PII
S1359-6454(09)00503-5;

Publishing Information

Journal Title
Acta Materialia
Journal Volume
57
Journal Issue
19
Journal Page Range
p. 5739-5747
ISSN
1359-6454
CODEN
ACMAFD

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
43039032
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ANNEALING; COMPUTERIZED SIMULATION; COOLING; DISTRIBUTION; HEAT RESISTING ALLOYS; KINETICS; MORPHOLOGY; NICKEL; NICKEL ALLOYS; NUCLEATION; PARTICLES; PHASE TRANSFORMATIONS; PRECIPITATION; SCANNING ELECTRON MICROSCOPY; TRANSMISSION ELECTRON MICROSCOPY
Descriptors DEC
ALLOYS; ELECTRON MICROSCOPY; ELEMENTS; HEAT RESISTANT MATERIALS; HEAT TREATMENTS; MATERIALS; METALS; MICROSCOPY; SEPARATION PROCESSES; SIMULATION; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENTS

Optional Information

Copyright
Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.