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Title: Characterization of alloy 718 subjected to different thermomechanical treatments

Chemical phase and microstructural investigations of alloy 718 solution-annealed and age-hardened were performed in this study. We focused on the effects of solution annealing temperature, aging temperature and holding time, and the amount of intermediate cold work on the alloy. We also studied the formation of secondary phases such as γ’-phase, γ”-phase, and δ-phase, grain sizes, and any deformations of the microstructure with respect to the processed conditions. Statistics such as size and number densities of these precipitates with respect to the processing conditions were evaluated and a discussion on optimum conditions in obtaining finer and higher density of γ’- and γ”-phase precipitates is also presented.
Authors:
 [1] ;  [2] ;  [1] ;  [2] ;  [2] ;  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology
  2. Univ. of Michigan, Ann Arbor, MI (United States). Nuclear Enigneering and Radiological Sciences
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
Additional Journal Information:
Journal Volume: 691; Journal Issue: C; Journal ID: ISSN 0921-5093
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE; Electric Power Research Inst. (EPRI)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Alloy 718; Gamma phase; Gamma-prime phase; Gamma-double prime phase; Delta phase; Precipitation hardening
OSTI Identifier:
1360064