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Title: An examination of abnormal grain growth in low strain nickel-200

Here, this study offers experimental observation of the effect of low strain conditions (ε < 10%) on abnormal grain growth (AGG) in Nickel-200. At such conditions, stored mechanical energy is low within the microstructure enabling one to observe the impact of increasing mechanical deformation on the early onset of AGG compared to a control, or nondeformed, equivalent sample. The onset of AGG was observed to occur at specific pairings of compressive strain and annealing temperature and an empirical relation describing the influence of thermal exposure and strain content was developed. The evolution of low-Σ coincident site lattice (CSL) boundaries and overall grain size distributions are quantified using electron backscatter diffraction preceding, at onset and during ensuing AGG, whereby possible mechanisms for AGG in the low strain regime are offered and discussed.
 [1] ;  [1] ;  [2] ;  [2] ;  [3] ;  [3]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. The Univ. of Alabama, Tuscaloosa, AL (United States)
  3. Univ. of Alabama in Huntsville, Huntsville, AL (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 2192-9262; PII: 290
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Metallography, Microstructure and Analysis
Additional Journal Information:
Journal Name: Metallography, Microstructure and Analysis; Journal ID: ISSN 2192-9262
Research Org:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
36 MATERIALS SCIENCE nickel; abnormal grain growth; low strain; electron backscattered diffraction