介在物寸法の統計的評価とそれに基づく高硬さ鋼の疲労限度の予測

• 村上 敬宜

• 宇宿 尚史

書誌事項

タイトル別名

• Prediction of fatigue strength of high-strength steels based on statistical evaluation of inclusion size.
• カイザイブツ スンポウ ノ トウケイテキ ヒョウカ ト ソレニ モトズク コウ

抄録

The reasons for relatively low fatigue strength and large scatter of fatigue strength were quantitatively elucidated considering the combined effects of hardness and nonmetallic inclusions on fatigue strength. Nonmetallic inclusions are equivalent to small defects or cracks from the viewpoint of fracture mechanics. The effects of nonmetallic inclusions on fatigue strength depend on their size, shape and location where they exist, and this becomes the cause of large scatter of the fatigue limit. However, it is possible to predict the upper (σ_wu) and lower limits (σ_wl) of the fatigue strength from the hardness (H_v) of a matrix and the maximum size of inclusions (√(area)_max) defined by the square root of the projected area of an inclusion. The expected value of √(area)_max in a definite number of specimens or machine components can be estimated by statistics of extreme values.

収録刊行物

• 日本機械学会論文集Ａ編

  日本機械学会論文集Ａ編 55 (510), 213-221, 1989

  一般社団法人 日本機械学会

キーワード

• Fatigue
• Inclusions
• Small Cracks
• Defects
• High-Strength Steels
• Vickers Hardness
• Threshold Stress Intensity Factor Range
• Fish-Eye
• Fatigue Limit
• Statistics of Extreme Values

詳細情報

• CRID: 1390001204477143936
• NII論文ID: 110002373867
• NII論文ID: 10003058964
• NII書誌ID: AN0018742X
• DOI: 10.1299/kikaia.55.213
• ISSN: 18848338
• ISSN: 03875008
• NDL書誌ID: 3222599
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3222599
• Web Site: http://www.jstage.jst.go.jp/article/kikaia1979/55/510/55_510_213/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可