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Mechanism for Metalloid Strengthening of Udimet-700
The deliberate use of metalloid (boron, carbon, silicon) and zirconium concentrations to improve the performance of nickel base superalloys has an interesting history. Initially small boron and zirconium additions were accidently added as crucible contaminants during casting. Their importance to the prevention of high temperature creep fracture became clear only after improved casting techniques eliminated these 'contaminants'. However, there is no appreciation of the important and different roles these trace additions play during high temperature creep. For this reason, a representative nickel base superalloy, namely Udimet-700, was selected and the effects of trace metalloid additions were studied in detail.
Mechanism for Metalloid Strengthening of Udimet-700
The deliberate use of metalloid (boron, carbon, silicon) and zirconium concentrations to improve the performance of nickel base superalloys has an interesting history. Initially small boron and zirconium additions were accidently added as crucible contaminants during casting. Their importance to the prevention of high temperature creep fracture became clear only after improved casting techniques eliminated these 'contaminants'. However, there is no appreciation of the important and different roles these trace additions play during high temperature creep. For this reason, a representative nickel base superalloy, namely Udimet-700, was selected and the effects of trace metalloid additions were studied in detail.
Mechanism for Metalloid Strengthening of Udimet-700
R. S. Polvani (author) / A. W. Ruff (author) / P. R. Strutt (author)
1983
4 pages
Report
No indication
English
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