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Title: Friction stir weld tools having fine grain structure

Tools for friction stir welding can be made with fewer process steps, lower cost techniques, and/or lower cost ingredients than other state-of-the-art processes by utilizing improved compositions and processes of fabrication. Furthermore, the tools resulting from the improved compositions and processes of fabrication can exhibit better distribution and homogeneity of chemical constituents, greater strength, and/or increased durability. In one example, a friction stir weld tool includes tungsten and rhenium and is characterized by carbide and oxide dispersoids, by carbide particulates, and by grains that comprise a solid solution of the tungsten and rhenium. The grains do not exceed 10 micrometers in diameter.
Inventors:
; ; ; ;
Issue Date:
OSTI Identifier:
1243073
Assignee:
Battelle Memorial Institute (Richland, WA) PNNL
Patent Number(s):
9,283,637
Application Number:
13/747,236
Contract Number:
AC05-76RL01830
Resource Relation:
Patent File Date: 2013 Jan 22
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING

Other works cited in this record:

Solution combustion synthesis of nanomaterials
journal, January 2007
  • Mukasyan, Alexander S.; Epstein, Paul; Dinka, Peter
  • Proceedings of the Combustion Institute, Vol. 31, Issue 2, p. 1789-1795
  • DOI: 10.1016/j.proci.2006.07.052

Solution combustion synthesis of bioceramic calcium phosphates by single and mixed fuels—A comparative study
journal, August 2008

Combustion synthesized WO3–ZrO2 nanocomposites as catalyst for the solvent-free synthesis of coumarins
journal, March 2008
  • Naik, Mallari A.; Mishra, Braja Gopal; Dubey, Amit
  • Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 317, Issue 1-3, p. 234-238
  • DOI: 10.1016/j.colsurfa.2007.10.019

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