Microstructure and tensile strength of electron - beam - welded Nickel base -superalloy / alloy steel dissimilar joints

DOI 21 References
  • OIWA Naoki
    IHI Corporation, Research & Development, Production Engineering Center (Tokyo Institute of Technology, Dept. of Materials Science & Engineering)
  • KUMAI Shinji
    Tokyo Institute of Technology, Dept. of Materials Sceince & Engineering

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Other Title
  • 電子ビーム溶接したＮｉ基超合金／合金鋼異材接合部のミクロ組織と引張強度

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Abstract

Dissimilar joints between Ni-base superalloy, which is available for turbine impeller for turbocharger, and alloy steel were fabricated by electron beam welding and their microstructure and tensile strength at a room temperature were examined. Macroscopic appearance of the weld part was similar in both joints, however, tensile strength of 247 alloy / SCM435H was smaller than that of 713C alloy / SCM435H joint, and feature of hot-tear fracture was more evident in the fracture surface. SEM-EDX analysis for the weld part found that a 10μm wide solute-segregated region traced the weld interface located in the superalloy side. Small hot-tear cracks were observed only in the segregated region of 247 alloy / SCM435H joint. These hot tear is likely to be distributed over single plane, so have significant effect to joint strength in some case of stress direction.

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Details 詳細情報について

  • CRID
    1390282679703648128
  • NII Article ID
    10030150545
  • NII Book ID
    AN1005067X
  • DOI
    10.2207/qjjws.29.35
  • ISSN
    24348252
    02884771
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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