Applicability of New KIC Estimation Method Using Equation σm=ψKICSmf1/2 for Hard or Brittle Materials to Ductile Hot Tool Alloy Steels

• Yanaba Yutaka

  Institute of Industrial Science, The University of Tokyo

• Hayashi Koji

  Institute of Industrial Science, The University of Tokyo

書誌事項

タイトル別名

• Applicability of New KIC Estimation Method Using Equation .SIGMA.m=.PSI.KICSmf1/2 for Hard or Brittle Materials to Ductile Hot Tool Alloy Steels
• Applicability of New KIC Estimation Method Using Equation シグマ m プサイ KICSmf1 2 for Hard or Brittle Materials to Ductile Hot Tool Alloy Steels

抄録

In the previous studies on the fracture of hard or brittle materials such as hardmetals, cermets, ceramics and glass whose un-notched test piece fractures to several fragments, we have semi-theoretically derived and experimentally verified a new equation which correlates the total macroscopic fracture surface area (S_mf) of all fragments of each un-notched test piece and its transverse-rupture strength (σ_m) with the fracture toughness (K_IC) of the material: σ_m=ΨK_ICS_mf^1/2. Here, Ψ is a factor including test piece size and test method, etc., and the value of Ψ was clarified to hardly depend on the kind of materials.<BR>In this study, we investigated whether this equation can be applied to ductile hot tool alloy steels which have extremely higher KIC and fracture not to several fragments, but to only two fragments even in the case of un-notched test piece, differing from the above hard or brittle materials. As the result, it was concluded that the equation substantially can be applied also to such ductile steels if a sharply notched test piece showing a brittle fracture mode is used.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 51 (7), 499-503, 2004

  一般社団法人 粉体粉末冶金協会

キーワード

• fracture toughness
• fracture surface area
• fracture strength
• hard materials
• ductile steel

詳細情報

• CRID: 1390001206309508480
• NII論文ID: 10013343748
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.51.499
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 7047216
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7047216
• 本文言語コード: en
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