タングステン焼結合金の破壊挙動と破壊靭性 Fracture Behavior and Fracture Toughness of W Sintered Alloys

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Fracture toughness behavior of W-Ni-Fe sintered alloys with three strength levels was investigated. With increasing tensile strength, dynamic fracture toughness K<SUB>ld</SUB> decreases dramatically, especially in the upper shelf. In low strength material, cracks propagate by the coalescence of boids created in binder, whereas in high strength material, cleavage fractures of W particles precede the void formation of binder. Fracture toughness K<SUB>max</SUB> significantly depends on specimen size. The K<SUB>max</SUB> increases with increasing specimen size, which is caused by larger amount of stable crack extension in larger specimens. No effect of loading rate on K<SUB>max</SUB> was observed.<BR>Relationship between the Charpy absorbed energy and dynamic fracture toughness was also investigated.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 43(5), 643-648, 1996-05-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002012263
  • 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
    3967175
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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