光学および原子間力顕微鏡によるWC-Co超硬合金破面のミクロ的面積と破面形成エネルギーの見積り Estimation of Microscopic Fracture Surface Area and Formation Energy of Fracture Surface of WC-Co Cemented Carbide by Using Optical and Atomic Force Microscopes

この論文にアクセスする

この論文をさがす

著者

抄録

The heights of bending fracture surface of WC-10mass%Co cemented carbide were measured by using OM (optical microscope) and AFM (atomic force microscope) in order to estimate the one-dimensional roughness of the surface (R<SUP>O</SUP> and R<SUP>A</SUP>, respectively) and then the microscopic fracture surface area (S<SUB>if</SUB>) and S<SUB>if</SUB>/S<SUB>mf</SUB> term in our proposed equation of σ<SUB>m</SUB>= ?? K<SUB>IC</SUB>S<SUB>mf</SUB><SUP>1/2</SUP> (S<SUB>mf</SUB> ; macroscopic fracture surface area of one test piece, σ<SUB>m</SUB> ; flexural strength, ?? ; shape factor including the ratio of S<SUB>if</SUB> or true fracture surface area (S<SUB>if</SUB>) to S<SUB>mf</SUB>, K<SUB>IC</SUB>; fracture toughness). Next, the value of γ+P (formation energy of fracture surface, γ; specific surface energy, P; specific plastic deformation work) in the prior equation of Vσ<SUB>m</SUB><SUP>2</SUP>/18E=(γ+P)S<SUB>if</SUB>+E<SUB>k</SUB> (V; volume of specimen, on which stress operates, E; Young's modulus, E<SUB>k</SUB>; kinetic energy of flying fragments) was evaluated The results obtained were as follows;<BR>1)The R<SUB>O</SUB> and R<SUB>A</SUB> were 1.27 and 1.43, respectively, and thus, ?? and S<SUB>if</SUB>/S<SUB>mf</SUB> were calculated to be 317mm<SUP>2</SUP> and 3.30, respectively.<BR>2)The value of γ+P was estimated to be 6.7×10<SUP>-4</SUP>J/mm<SUP>2</SUP>.<BR>3)The physical rationality of the equation of σ<SUB>m</SUB>= ?? K<SUB>IC</SUB>S<SUB>mf</SUB><SUP>1/2</SUP> should be examined furthermore by investigating the correctness of this value of γ+P or S<SUB>if</SUB> and also the dissipatoin energy by vibration accompanied by crack propagation.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 44(3), 263-268, 1997-03-15 

    Japan Society of Powder and Powder Metallurgy

参考文献:  9件

参考文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

被引用文献:  1件

被引用文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

各種コード

  • NII論文ID(NAID)
    10002013675
  • 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
    4172711
  • 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  CJP引用  NDL  J-STAGE 
ページトップへ