Superalloys 2015
DOI: 10.5772/61104
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Welding Metallurgy of Corrosion-Resistant Superalloy C-276

Abstract: Microsegregation occurs during solidification of fusion zone in alloy C-. The concomitant precipitation of topologically close-packed phases P and μ has been reported to be responsible for the hot cracking observed in this alloy during welding.The clue to preventing hot cracking hence lies in suppressing microsegregation in the fusion zone. An important avenue towards this is the introduction of current pulsing during gas tungsten arc welding. Current pulsing was found to be effective in mitigating microsegreg… Show more

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