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Embrittlement of types 316l and 347 weld overlay by post-weld heat treatment and hydrogen

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Abstract

The effects of post-weld heat treatment and hydrogen on the tensile properties of weld overlay of types 316L and 347 have been studied. Formation of sigma phase(σ) from the delta ferrite (σ) in the as-welded microstructure leads to significant loss of ductility and increased sensitivity to hydrogen. Although hydrogen charging caused ductility losses in all conditions, no change in fracture mode was found by scanning electron and optical microscopy.

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  1. Engineering and Metal Physics Section, PMRL,CANMET, Ottawa, Canada

    W. Tyson (Head)

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  1. W. Tyson
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Tyson, W. Embrittlement of types 316l and 347 weld overlay by post-weld heat treatment and hydrogen. Metall Trans A 15, 1475–1484 (1984). https://doi.org/10.1007/BF02648577

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  • DOI: https://doi.org/10.1007/BF02648577

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