Application of New Estimating Method of Fracture Toughness by Use of Equation of sm=psKlcSmf1/2 to High Speed Steel

• 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

• Application of New Estimating Method of Fracture Toughness by Use of Equationof .SIGMA.m=.PSI.KICSmf1/2 to High Speed Steel.

抄録

We investigated whether our new estimating method of fracture toughness (K_IC) by use of equation of σ_m-ψK_IC S_mf^1/2 (σ_m; three point bending fracture strength, ψ, a material factor, S_mf; total macroscopic area of bending fracture surface of all fragments for one test piece) is applicable to high speed steel (HSS) having K_IC and σ_m values higher than those of WC-l0mass%Co hardmetal. It was found that a linear relation was observed between σ_m and S_mf^1/2 for three kinds of HSS specimens (SKH12, SKH51 and SKH55, according to JIS G4403), respectively, and that the values (K^E_IC) of fracture toughness (about 21, 20 and 18MPam^1/2, respectively) estimated from the slopes of the regression lines between σ_m and S_mf^1/2 coincided well with the values (K^M_IC) of fracture toughness measured with SEPB method. Therefore, it was concluded that this new estimating method of K_IC is also applicable to HSS.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 46 (4), 432-437, 1999

  一般社団法人 粉体粉末冶金協会

キーワード

• fracture surface area
• fracture toughness
• bending fracture strength
• high speed steel

詳細情報

• CRID: 1390282681285990528
• NII論文ID: 10002262365
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.46.432
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 4701681
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4701681
• 本文言語コード: en
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