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Microstructure and thermomechanical pretreatment effects on creep behaviour of helium-implanted DIN 1·4970 austenitic stainless steel

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Abstract

Microstructure investigations were carried out on unimplanted and 150 at.ppm helium implanted foil specimens of DIN 1·4970 austenitic stainless steel after various thermomechanical pretreatments. Creep tests were also carried out for both helium-implanted and unimplanted specimens at 700°C and 800°C. The strength, ductility and rupture time are correlated with the dislocation and precipitate distributions. Helium embrittlement can be reduced in these experiments when dispersive TiC precipitate distributions are produced by proper pretreatments or allowed to form during creep test.

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Authors and Affiliations

  1. Metallurgy Department, Nuclear Research Centre, Atomic Energy, P.O. Box, Cairo, Egypt

    M K Matta & W Kesternich

  2. KFA-IFF, Postfach 1913, D-5170, Jülich-1, Germany

    W Kesternich

Authors
  1. M K Matta
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  2. W Kesternich
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Matta, M.K., Kesternich, W. Microstructure and thermomechanical pretreatment effects on creep behaviour of helium-implanted DIN 1·4970 austenitic stainless steel. Bull. Mater. Sci. 13, 313–322 (1990). https://doi.org/10.1007/BF02745034

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  • DOI: https://doi.org/10.1007/BF02745034

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