Failure analysis of seamless bellows used in flowing liquid sodium at 873 K.
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Inter-dendritic structure formation in weld joint of bellow with supporting ring and welded by TIG welding process.
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Due to the misalignment of copper sink, temperature rise has occurred in heat affected zone of the weld joint and hence led to sensitization.
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Pulsed TIG welding process shall be employed for joining bellow convolution with supporting ring.