Mo_2FeB_2系硬質合金の室温微小塑性と高温内部摩擦 Room Temperature Microplasticity and High Temperature Internal Friction of Mo_2FeB_2 Based Hard Alloys

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Influence of strain amplitude and temperature on the internal friction of Mo<SUB>2</SUB>FeB<SUB>2</SUB> based hard alloys were measured by torsional vibration method. The strain amplitude dependency of internal friction was observed. It became clear from the study about Granato-Lücke plots that the mechanism of this relaxation is attributed to break away model of dislocation. It was observed that microplasticity at room temperature appeared in order of C70(Mo<SUB>2</SUB>FeB<SUB>2</SUB>-54%iron based binder(10%Cr, 5%Ni)), V31(Mo2FeB2-34%iron based binder(6%Cr, 6%Ni)), H71(Mo<SUB>2</SUB>FeB<SUB>2</SUB>-54%iron based binder(17%Cr, 19%Ni)). In the temperature dependency of internal friction of the hard alloys containing martensite phase in the bonding phase, relaxation peak caused by the phase transformation from austenite phase to martensite phase was appeared at 1033-1068 K and its activation energy and phase transformation temperature were 140-145 kJ/mol and 1093-1173 K, respectively. At following high temperature, a conspicuous increase of the internal friction probably based on plastic flow of the grain boundary was observed. Its activation energy was 106-218 kJ/mol.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 45(6), 553-560, 1998-06-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002052244
  • 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
    4502279
  • 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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