Sixty-Second Annual Meeting of the Society
DOI: 10.1520/stp43671s
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Microstructure of a Cast Age-Hardenable Nickel-Chromium Alloy

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“…This limit is based on electron vacancy theory and is designated as (Nvl• They determined that a (Nv) of about 2.35 was a safe upper limit. Control of chemistry levels to this (Ny) limit has produced Udimet 700 alloy free of sigma-phase formation after exposure for 1500 hr at 1500 F. The original limit that was proposed by Boesch and Slaney has been somewhat modified by other investigators (2,3) and is currently receiving detailed treatment by Quigg and associates (4). Corrosion evaluation of superalloys has taken many forms and pertinent results of numerous investigators were presented at a corrosion symposium (5).…”
Section: Laboratory Evaluation Of High Strength Alloysmentioning
confidence: 99%
“…This limit is based on electron vacancy theory and is designated as (Nvl• They determined that a (Nv) of about 2.35 was a safe upper limit. Control of chemistry levels to this (Ny) limit has produced Udimet 700 alloy free of sigma-phase formation after exposure for 1500 hr at 1500 F. The original limit that was proposed by Boesch and Slaney has been somewhat modified by other investigators (2,3) and is currently receiving detailed treatment by Quigg and associates (4). Corrosion evaluation of superalloys has taken many forms and pertinent results of numerous investigators were presented at a corrosion symposium (5).…”
Section: Laboratory Evaluation Of High Strength Alloysmentioning
confidence: 99%