Elucidation of dwell-fatigue behavior in Ti-6Al-4V alloys by AE monitoring and Crystal plasticity simulations

2023 年度 実績報告書

• 研究課題/領域番号: 22K14139
• 研究機関: 東京大学
• 研究代表者: ブリフォ ファビャン 東京大学, 大学院工学系研究科(工学部), 特任研究員 (70836890)
• 研究期間 (年度): 2022-04-01 – 2024-03-31
• キーワード: DIC / Fatigue / Ti-6Al-4V / crack initiation / dwell-fatigue

研究実績の概要

The primary aim of this study was to uncover the mechanisms of cold-dwell fatigue in Ti6Al-4V alloys in contrast to pure fatigue, utilizing real-time observations and computational simulations. The specific advancements achieved are as follows:
(1) Application of the ASSISL framework to quantify the disparities in strain distribution between pure fatigue and dwell fatigue scenarios.
(2) Development of a numerical framework using the CPFEM to predict dwell-fatigue based on experimental results.

研究成果

• [雑誌論文] Quantitative investigation of slip band activities in a bimodal titanium alloy under pure fatigue and dwell-fatigue loadings (2024)
  • 著者名/発表者名: Hu Haoyu、Briffod Fabien、Yin Wujun、Shiraiwa Takayuki、Enoki Manabu
  • 雑誌名: International Journal of Fatigue 巻: 182 ページ: 108203～108203
  • DOI: 10.1016/j.ijfatigue.2024.108203
  • 査読あり / 国際共著
• [雑誌論文] Automated slip system identification and strain analysis framework using high-resolution digital image correlation data: Application to a bimodal Ti-6Al-4V alloy (2023)
  • 著者名/発表者名: Hu Haoyu、Briffod Fabien、Shiraiwa Takayuki、Enoki Manabu
  • 雑誌名: International Journal of Plasticity 巻: 166 ページ: 103618～103618
  • DOI: 10.1016/j.ijplas.2023.103618
  • 査読あり / 国際共著
• [学会発表] Fatigue and Dwell-fatigue behavior of a forged Ti-6Al-4V alloy investigated by High-Resolution Digital Image Correlation (2023)
  • 著者名/発表者名: Briffod Fabien, Hu Haoyu、Shiraiwa Takayuki、Enoki Manabu
  • 学会等名: International Conference of Fracture 15 (ICF15)
• [学会発表] The Study of Crack Initiation of Forged Ti-6Al-4V Alloys under Dwell-fatigue loadings by Sub-grain Scale In-plane and Out-of-plane Deformation Analysis (2023)
  • 著者名/発表者名: Hu Haoyu、Briffod Fabien、Shiraiwa Takayuki、Enoki Manabu
  • 学会等名: THERMEC 2023
• [学会発表] The study of crack initiation of Ti-6Al-4V alloys subjected to dwell-fatigue through high resolution digital image correlation (2023)
  • 著者名/発表者名: Hu Haoyu、Briffod Fabien、Shiraiwa Takayuki、Enoki Manabu
  • 学会等名: PRICM11
• [学会発表] Quantitative Analysis of Slip-induced Localized Plastic Deformation under Dwell-fatigue in Ti-6Al-4V Alloys (2023)
  • 著者名/発表者名: Hu Haoyu、Briffod Fabien、Shiraiwa Takayuki、Enoki Manabu
  • 学会等名: JIM Fall Meeting 2023
• [学会発表] Crystal plasticity simulations of Ti-6Al-4V alloy under fatigue and dwell-fatigue conditions (2023)
  • 著者名/発表者名: Briffod Fabien, Hu Haoyu、Shiraiwa Takayuki、Enoki Manabu
  • 学会等名: JIM Spring Meeting 2024