スーパーアロイMIM材の疲労破壊特性 Fatigue Failure Properties of Injection Molded Superalloy Compacts

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Superalloys have been used especially for aerospace and atomic energy applications because of their excellent attributes of high corrosion and oxidation resistance, and high temperature strength. A Inconel 718 is one of representative Ni-base superalloys. However, it is not easy to produce the complicate shaped parts with low cost due to their poor workability. In this study, Metal Injection Molding (MIM) process, one of near net-shape powder forming, has been applied to fabricate the Inconel 718 alloy compacts using two type of powders; gas and water atomized powders. By optimizing the MIM process, their obtained relative density was near full density (98∼99 %). However, the fatigue strength of heat treated sintered Inconel 718 compacts showed 65 % of heat treated wrought materials due to the remained pores. The effect of remained pores on fatigue strength was discussed by the prediction equation of endurance limit considering the inclusion.

収録刊行物

  • 粉体および粉末冶金

    粉体および粉末冶金 58(11), 679-685, 2011-11-15

    一般社団法人 粉体粉末冶金協会

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各種コード

  • NII論文ID(NAID)
    10030479508
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    023352544
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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