Studies on the technique for controlling the fatigue fracture by shot-peening process

• Project/Area Number: 24560105
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Materials/Mechanics of materials
• Research Institution: Kumamoto University
• Principal Investigator: KURODA MASATOSHI 熊本大学, 自然科学研究科, 准教授 (00432998)
• Co-Investigator(Kenkyū-buntansha): AKITA Koichi 独立行政法人日本原子力研究開発機構, 量子ビーム応用研究部門, 主任研究員 (10231820)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2014: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2012: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
• Keywords: ショットピーニング / ステンレス鋼 / 表面特性 / 疲労強度 / 原子力材料 / 疲労 / 表面処理 / 残留応力

Outline of Final Research Achievements

Not only the evaluation of the fatigue strength for shot-peened material but also the development of the technique for controlling the surface properties of material by shot-peening process play an important part in controlling the fatigue fracture of structures by shot-peening process. In the present study, the response surface model which can represent the quantitative relationship between the shot-peening conditions and the surface properties of material has been developed by introducing the design of experiments. It was indicated that the surface properties of fatigue specimens predicted by the response surface model agreed roughly with the experiments.

Research Products

• [Presentation] 所定の表面残留応力を有する小野式回転曲げ疲労試験片の旋盤加工技術
  • Author(s): 黒田雅利，岩本達也，猪崎貴晴，山田輝明
  • Organizer: 日本機械学会九州支部第67期総会・講演会
  • Place of Presentation: 九州工業大学工学部
• [Presentation] EBSD解析によるステンレス鋼の疲労損傷検出の検討（結晶粒界への着目）
  • Author(s): 黒田雅利，釜谷昌幸，森貴之，猪崎貴晴
  • Organizer: 日本機械学会M&M2013材料力学カンファレンス
  • Place of Presentation: 岐阜大学柳戸キャンパス
• [Presentation] ステンレス鋼の低サイクル疲労による転位分布変化のTEM像を用いた解析
  • Author(s): 大西宏幸，安永和史，黒田雅利
  • Organizer: 日本機械学会九州支部鹿児島講演会
  • Place of Presentation: 鹿児島大学工学部
• [Presentation] Preliminary development of crystal orientation map for EBSD by MATLAB programming
  • Author(s): Debrina Puspita Andriani, Masatoshi Kuroda
  • Organizer: 日本機械学会九州支部鹿児島講演会
  • Place of Presentation: 鹿児島大学工学部