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

2023 Fiscal Year Annual Research Report

• Project/Area Number: 22K14139
• Research Institution: The University of Tokyo
• Principal Investigator: 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)
• Project Period (FY): 2022-04-01 – 2024-03-31
• Keywords: DIC / Fatigue / Ti-6Al-4V / crack initiation / dwell-fatigue

Outline of Annual Research Achievements

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.

Research Products

• [Journal Article] Quantitative investigation of slip band activities in a bimodal titanium alloy under pure fatigue and dwell-fatigue loadings (2024)
  • Author(s): Hu Haoyu、Briffod Fabien、Yin Wujun、Shiraiwa Takayuki、Enoki Manabu
  • Journal Title: International Journal of Fatigue Volume: 182 Pages: 108203～108203
  • DOI: 10.1016/j.ijfatigue.2024.108203
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Automated slip system identification and strain analysis framework using high-resolution digital image correlation data: Application to a bimodal Ti-6Al-4V alloy (2023)
  • Author(s): Hu Haoyu、Briffod Fabien、Shiraiwa Takayuki、Enoki Manabu
  • Journal Title: International Journal of Plasticity Volume: 166 Pages: 103618～103618
  • DOI: 10.1016/j.ijplas.2023.103618
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Fatigue and Dwell-fatigue behavior of a forged Ti-6Al-4V alloy investigated by High-Resolution Digital Image Correlation (2023)
  • Author(s): Briffod Fabien, Hu Haoyu、Shiraiwa Takayuki、Enoki Manabu
  • Organizer: International Conference of Fracture 15 (ICF15)
• [Presentation] 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)
  • Author(s): Hu Haoyu、Briffod Fabien、Shiraiwa Takayuki、Enoki Manabu
  • Organizer: THERMEC 2023
• [Presentation] The study of crack initiation of Ti-6Al-4V alloys subjected to dwell-fatigue through high resolution digital image correlation (2023)
  • Author(s): Hu Haoyu、Briffod Fabien、Shiraiwa Takayuki、Enoki Manabu
  • Organizer: PRICM11
• [Presentation] Quantitative Analysis of Slip-induced Localized Plastic Deformation under Dwell-fatigue in Ti-6Al-4V Alloys (2023)
  • Author(s): Hu Haoyu、Briffod Fabien、Shiraiwa Takayuki、Enoki Manabu
  • Organizer: JIM Fall Meeting 2023
• [Presentation] Crystal plasticity simulations of Ti-6Al-4V alloy under fatigue and dwell-fatigue conditions (2023)
  • Author(s): Briffod Fabien, Hu Haoyu、Shiraiwa Takayuki、Enoki Manabu
  • Organizer: JIM Spring Meeting 2024