Quantitative X-ray diffraction analysis of oxides formed on superalloys
Unknown · 2013
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Description
Ralph G Garlick of the Lewis Research Center developed these analysis methods in September 1972, as NASA TM X-2627. Superalloy parts grow oxide scales as they oxidize in hot service. Knowing exactly which oxides are present, and how much, guides alloy design. X-ray diffraction can identify those oxides from their crystal patterns. Garlick's methods turned that identification into firm numbers. Five oxides common on superalloys were covered by the work.
The methods held their error near a tenth of the amount reported. That accuracy assumed well studied samples matched to made standards. Garlick demonstrated one technique on flakes from oxidation tests. The test alloy was the cobalt based superalloy WI-52. Its spalled scales showed what the method could measure in practice. Turbine and furnace alloy work both used such checks.
Catalog record
| CREATOR | Unknown |
|---|---|
| YEAR | 2013 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 27 KB |
| LICENSE | Public Domain |
| RIGHTS | PUBLIC DOMAIN |
| SOURCE | NASA NTRS |