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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

Hackenberg, Robert Errol, Hemphill, Geralyn M. Sewald, Forsyth, Robert Thomas, Papin, Pallas Athene, Kelly, Ann M., Tucker, Tim Jeffrey, Aikin, Robert M. Jr., Alexander, David John, Lopez, Michael F., and Clarke, Amy Jean. Unraveling the Age Hardening Response in U-Nb Alloys. United States: N. p., Web. doi:10.4028/www.scientific.net/MSF.879.665.
Hackenberg, Robert Errol, Hemphill, Geralyn M. Sewald, Forsyth, Robert Thomas, Papin, Pallas Athene, Kelly, Ann M., Tucker, Tim Jeffrey, Aikin, Robert M. Jr., Alexander, David John, Lopez, Michael F., & Clarke, Amy Jean. Unraveling the Age Hardening Response in U-Nb Alloys. United States. doi:10.4028/www.scientific.net/MSF.879.665.
Hackenberg, Robert Errol, Hemphill, Geralyn M. Sewald, Forsyth, Robert Thomas, Papin, Pallas Athene, Kelly, Ann M., Tucker, Tim Jeffrey, Aikin, Robert M. Jr., Alexander, David John, Lopez, Michael F., and Clarke, Amy Jean. 2016. "Unraveling the Age Hardening Response in U-Nb Alloys". United States. doi:10.4028/www.scientific.net/MSF.879.665. https://www.osti.gov/servlets/purl/1338743.
@article{osti_1338743,
title = {Unraveling the Age Hardening Response in U-Nb Alloys},
author = {Hackenberg, Robert Errol and Hemphill, Geralyn M. Sewald and Forsyth, Robert Thomas and Papin, Pallas Athene and Kelly, Ann M. and Tucker, Tim Jeffrey and Aikin, Robert M. Jr. and Alexander, David John and Lopez, Michael F. and Clarke, Amy Jean},
abstractNote = {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.},
doi = {10.4028/www.scientific.net/MSF.879.665},
journal = {Materials Science Forum (Online)},
number = ,
volume = 879,
place = {United States},
year = {2016},
month = {11}
}