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Title: Unraveling the Age Hardening Response in U-Nb Alloys

Complicating factors that have stymied understanding of uranium-niobium’s aging response are briefly reviewed, including (1) niobium inhomogeneity, (2) machining damage effects on tensile properties, (3) early-time transients of ductility increase, and (4) the variety of phase transformations. A simple Logistic-Arrhenius model was applied to predict yield and ultimate tensile strengths and tensile elongation of U-4Nb as a function of thermal age. Lastly, fits to each model yielded an apparent activation energy that was compared with phase transformation mechanisms.
Authors:
ORCiD logo [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-16-20301
Journal ID: ISSN 1662-9752
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Materials Science Forum (Online)
Additional Journal Information:
Journal Name: Materials Science Forum (Online); Journal Volume: 879; Conference: THERMEC-2016: 9th International Conference on Processing & Manufacturing of Advanced Materials, Graz (Austria), 29 May - 03 Jun 2016; Journal ID: ISSN 1662-9752
Publisher:
Trans Tech Publications
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Aging; Phase Transformations; Precipitation Hardening; Tensile Testing
OSTI Identifier:
1338743