ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The effect of phosphorus in some typical wrought superalloys including IN718, GH761and GH4133 has been studied. Phosphorus was not dissolved in the γ matrix of superalloys and wassegregated in the residual liquids seriously during solidification, and the solidification of the alloysadded with phosphorus was always finished by the precipitation of a phosphorus bearing phase.Two factors controlling the segregation tendency of a minor element were determined, one is thesolubility of the element in the matrix, another is the precipitation temperature of a phase in whichthe element is absorbed. The detrimental effect of phosphorus on the solidification could beeliminated by a proper homogenization treatment. Phosphorus improved the stress ruptureproperties of the alloys with a fine grain structure. By combining the grain refinement withphosphorus addition, the properties of GH761 alloy was improved efficiently
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.3053.pdf
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