Elucidation of gigacycle fatigue mechanism of high-strength steel using a nano beach mark method

• Project/Area Number: 23760106
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Materials/Mechanics of materials
• Research Institution: National Institute for Materials Science
• Principal Investigator: FURUYA Yoshiyuki 独立行政法人物質・材料研究機構, 材料信頼性評価ユニット, 主幹研究員 (60354255)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 疲労 / ギガサイクル疲労 / 高強度鋼 / 内部破壊 / 介在物

Research Abstract

The internal fatigue crack growth was successfully visualized by using beach marks, which is necessary for the elucidation of gigacycle fatigue mechanism of high-strength steel. The beach marks indicated that a minimum crack propagation rate could be smaller than a lattice length. This means that evaluation of the gigacycle fatigue strength could be based on the crack propagation life.

Research Products

• [Journal Article] Gigacycle Fatigue Properties of Double-Melted SCM440 Steel and Size Effects (2013)
  • Author(s): 古谷佳之
  • Journal Title: Tetsu-to-Hagane Volume: 99 Issue: 5 Pages: 373-379
  • DOI: 10.2355/tetsutohagane.99.373
  • NAID: 130003372538
  • ISSN: 0021-1575, 1883-2954
  • Peer Reviewed
• [Presentation] SCM440 鋼ダブルメルト材のギガサイクル疲労特性 (2012)
  • Author(s): 古谷佳之
  • Organizer: 日本鉄鋼協会 第164回秋季講演大会
  • Place of Presentation: 愛媛大学
  • Year and Date: 2012-09-17
• [Presentation] 高清浄度鋼のギガサイクル疲労における寸法効果 (2012)
  • Author(s): 古谷佳之
  • Organizer: 日本機械学会 2012年度年次大会
  • Place of Presentation: 金沢大学
  • Year and Date: 2012-09-10
• [Presentation] 高清浄度鋼のギガサイクル疲労における寸法効果 (2012)
  • Author(s): 古谷佳之
  • Organizer: 日本機械学会 2012年度年次大会
  • Place of Presentation: 金沢大学
• [Presentation] SCM440鋼ダブルメルト材のギガサイクル疲労特性 (2012)
  • Author(s): 古谷佳之
  • Organizer: 日本鉄鋼協会 第164回秋季講演大会
  • Place of Presentation: 愛媛大学