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Title: Annealing of (DU-10Mo)-Zr Co-Rolled Foils

Abstract

Producing uranium-10wt% molybdenum (DU-10Mo) foils to clad with Al first requires initial bonding of the DU-10Mo foil to zirconium (Zr) by hot rolling, followed by cold rolling to final thickness. Rolling often produces wavy (DU-10Mo)-Zr foils that should be flattened before further processing, as any distortions could affect the final alignment and bonding of the Al cladding to the Zr co-rolled surface layer; this bonding is achieved by a hot isostatic pressing (HIP) process. Distortions in the (DU-10Mo)-Zr foil may cause the fuel foil to press against the Al cladding and thus create thinner or thicker areas in the Al cladding layer during the HIP cycle. Post machining is difficult and risky at this stage in the process since there is a chance of hitting the DU-10Mo. Therefore, it is very important to establish a process to flatten and remove any waviness. This study was conducted to determine if a simple annealing treatment could flatten wavy foils. Using the same starting material (i.e. DU-10Mo coupons of the same thickness), five different levels of hot rolling and cold rolling, combined with five different annealing treatments, were performed to determine the effect of these processing variables on flatness, bonding of layers, annealingmore » response, microstructure, and hardness. The same final thickness was reached in all cases. Micrographs, textures, and hardness measurements were obtained for the various processing combinations. Based on these results, it was concluded that annealing at 650°C or higher is an effective treatment to appreciably reduce foil waviness.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Colorado School of Mines, Golden, CO (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)
OSTI Identifier:
1340958
Report Number(s):
LA-UR-17-20385
TRN: US1701835
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; ROLLING; BONDING; ANNEALING; CLADDING; FOILS; HOT PRESSING; MOLYBDENUM; URANIUM; ZIRCONIUM; Uranium-10wt% molybdenum; zirconium; fuel foils; aluminum cladding; hot rolling; cold rolling; annealing; relative flatness; interfaces; interaction zone; composition gradients; recrystallization; tex

Citation Formats

Pacheco, Robin Montoya, Alexander, David John, Mccabe, Rodney James, Clarke, Kester Diederik, Scott, Jeffrey E., Montalvo, Joel Dwayne, Papin, Pallas, and Ansell, George S.. Annealing of (DU-10Mo)-Zr Co-Rolled Foils. United States: N. p., 2017. Web. doi:10.2172/1340958.
Pacheco, Robin Montoya, Alexander, David John, Mccabe, Rodney James, Clarke, Kester Diederik, Scott, Jeffrey E., Montalvo, Joel Dwayne, Papin, Pallas, & Ansell, George S.. Annealing of (DU-10Mo)-Zr Co-Rolled Foils. United States. doi:10.2172/1340958.
Pacheco, Robin Montoya, Alexander, David John, Mccabe, Rodney James, Clarke, Kester Diederik, Scott, Jeffrey E., Montalvo, Joel Dwayne, Papin, Pallas, and Ansell, George S.. Fri . "Annealing of (DU-10Mo)-Zr Co-Rolled Foils". United States. doi:10.2172/1340958. https://www.osti.gov/servlets/purl/1340958.
@article{osti_1340958,
title = {Annealing of (DU-10Mo)-Zr Co-Rolled Foils},
author = {Pacheco, Robin Montoya and Alexander, David John and Mccabe, Rodney James and Clarke, Kester Diederik and Scott, Jeffrey E. and Montalvo, Joel Dwayne and Papin, Pallas and Ansell, George S.},
abstractNote = {Producing uranium-10wt% molybdenum (DU-10Mo) foils to clad with Al first requires initial bonding of the DU-10Mo foil to zirconium (Zr) by hot rolling, followed by cold rolling to final thickness. Rolling often produces wavy (DU-10Mo)-Zr foils that should be flattened before further processing, as any distortions could affect the final alignment and bonding of the Al cladding to the Zr co-rolled surface layer; this bonding is achieved by a hot isostatic pressing (HIP) process. Distortions in the (DU-10Mo)-Zr foil may cause the fuel foil to press against the Al cladding and thus create thinner or thicker areas in the Al cladding layer during the HIP cycle. Post machining is difficult and risky at this stage in the process since there is a chance of hitting the DU-10Mo. Therefore, it is very important to establish a process to flatten and remove any waviness. This study was conducted to determine if a simple annealing treatment could flatten wavy foils. Using the same starting material (i.e. DU-10Mo coupons of the same thickness), five different levels of hot rolling and cold rolling, combined with five different annealing treatments, were performed to determine the effect of these processing variables on flatness, bonding of layers, annealing response, microstructure, and hardness. The same final thickness was reached in all cases. Micrographs, textures, and hardness measurements were obtained for the various processing combinations. Based on these results, it was concluded that annealing at 650°C or higher is an effective treatment to appreciably reduce foil waviness.},
doi = {10.2172/1340958},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 20 00:00:00 EST 2017},
month = {Fri Jan 20 00:00:00 EST 2017}
}

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