On Liquation and Liquid Phase Oxidation during Linear Friction Welding of Nickel-Base IN738 and CMSX Superalloys

DOIResolve DOI: http://doi.org/10.1002/9781118516430.ch65
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TypeBook Chapter
Book titleSuperalloys 2012
Pages587594; # of pages: 8
AbstractA systematic study of the microstructural response of conventionally cast IN 738 and single crystal CMSX 486 superalloys during linear friction welding was performed. The results revealed that, aside from a significant liquation of various phases that occurred during joining, continuous oxide films formed on the weld lines in both materials. The weld line oxides consisted of aluminum-rich and hafnium-base oxides in IN 738 and CMSX 486 superalloys, respectively, which can be deleterious to the mechanical properties of the weld joint. Gleeble thermo-mechanical simulation showed that the oxides were produced by the oxidation of some liquid exposed to atmospheric oxygen at the mating surfaces of the work pieces. A practicable method of eliminating liquid phase oxidation during linear friction welding of nickel-base superalloys is discussed. © 2012 The Minerals, Metals, & Materials Society. All rights reserved.
Publication date
AffiliationNational Research Council Canada (NRC-CNRC); Aerospace
Peer reviewedYes
NPARC number21269562
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Record identifierd581a09e-18e3-4b44-866d-d8a09d783f2f
Record created2013-12-12
Record modified2016-05-09
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