skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Extrusion-formed uranium-2.4 wt. % article with decreased linear thermal expansion and method for making the same

Abstract

The present invention is directed to the fabrication of an article of uranium-2.4 wt. % niobium alloy in which the linear thermal expansion in the direction transverse to the extrusion direction is less than about 0.98% between 22.degree. C. and 600.degree. C. which corresponds to a value greater than the 1.04% provided by previous extrusion operations over the same temperature range. The article with the improved thermal expansion possesses a yield strength at 0.2% offset of at least 400 MPa, an ultimate tensile strength of 1050 MPa, a compressive yield strength of at least 0.2% offset of at least 675 MPa, and an elongation of at least 25% over 25.4 mm/sec. To provide this article with the improved thermal expansion, the uranium alloy billet is heated to 630.degree. C. and extruded in the alpha phase through a die with a reduction ratio of at least 8.4:1 at a ram speed no greater than 6.8 mm/sec. These critical extrusion parameters provide the article with the desired decrease in the linear thermal expansion while maintaining the selected mechanical properties without encountering crystal disruption in the article.

Inventors:
 [1];  [2];  [2]
  1. (Crossville, TN)
  2. (Oak Ridge, TN)
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
864422
Patent Number(s):
4361447
Assignee:
United States of America as represented by United States (Washington, DC) ORNL
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
extrusion-formed; uranium-2; wt; article; decreased; linear; thermal; expansion; method; directed; fabrication; niobium; alloy; direction; transverse; extrusion; 98; 22; degree; 600; corresponds; value; 04; provided; previous; operations; temperature; range; improved; possesses; yield; strength; offset; 400; mpa; ultimate; tensile; 1050; compressive; 675; elongation; 25; provide; uranium; billet; heated; 630; extruded; alpha; phase; die; reduction; ratio; speed; critical; parameters; desired; decrease; maintaining; selected; mechanical; properties; encountering; crystal; disruption; ultimate tensile; improved thermal; uranium alloy; temperature range; thermal expansion; mechanical properties; tensile strength; yield strength; compressive yield; direction transverse; linear thermal; niobium alloy; /148/420/

Citation Formats

Anderson, Robert C., Jones, Jack M., and Kollie, Thomas G. Extrusion-formed uranium-2.4 wt. % article with decreased linear thermal expansion and method for making the same. United States: N. p., 1982. Web.
Anderson, Robert C., Jones, Jack M., & Kollie, Thomas G. Extrusion-formed uranium-2.4 wt. % article with decreased linear thermal expansion and method for making the same. United States.
Anderson, Robert C., Jones, Jack M., and Kollie, Thomas G. Fri . "Extrusion-formed uranium-2.4 wt. % article with decreased linear thermal expansion and method for making the same". United States. https://www.osti.gov/servlets/purl/864422.
@article{osti_864422,
title = {Extrusion-formed uranium-2.4 wt. % article with decreased linear thermal expansion and method for making the same},
author = {Anderson, Robert C. and Jones, Jack M. and Kollie, Thomas G.},
abstractNote = {The present invention is directed to the fabrication of an article of uranium-2.4 wt. % niobium alloy in which the linear thermal expansion in the direction transverse to the extrusion direction is less than about 0.98% between 22.degree. C. and 600.degree. C. which corresponds to a value greater than the 1.04% provided by previous extrusion operations over the same temperature range. The article with the improved thermal expansion possesses a yield strength at 0.2% offset of at least 400 MPa, an ultimate tensile strength of 1050 MPa, a compressive yield strength of at least 0.2% offset of at least 675 MPa, and an elongation of at least 25% over 25.4 mm/sec. To provide this article with the improved thermal expansion, the uranium alloy billet is heated to 630.degree. C. and extruded in the alpha phase through a die with a reduction ratio of at least 8.4:1 at a ram speed no greater than 6.8 mm/sec. These critical extrusion parameters provide the article with the desired decrease in the linear thermal expansion while maintaining the selected mechanical properties without encountering crystal disruption in the article.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {1}
}

Patent:

Save / Share: