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

通过 AE 监测和晶体塑性模拟阐明 Ti-6Al-4V 合金的驻留疲劳行为

• 批准号: 22K14139
• 负责人: ブリフォ ファビャン
• 金额: $ 3万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2022
• 资助国家: 日本
• 起止时间: 2022-04-01 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22K14139/
• 关键词: DIC; Fatigue; Ti-6Al-4V; crack initiation; macrozone; Crystal plasticity; Acoustic Emission; Dwell fatigue; Finite Element Method; Titanium alloy

The main objective of this research is to elucidate cold dwell fatigue mechanisms in Ti6Al-4V alloys in comparison with pure fatigue through a combination of in-situ observationsand numerical simulations. The specific progresses are described below:(1)A High-resolution strain mapping method based on the digital image correlation of surface nano-scale pattern produced by gold nanolayered film through vapor-assisted remodeling was developed.(2)An automated framework for identifying slip system and assessing strain localization of slip bands termed ASSISL (automated Slip System Identification and Strain Localization analysis of slip bands) was developed.(3)The framework was applied to quantifying the differences in strain partitioning between pure and dwell fatigue.

本研究的主要目的是通过现场观察和数值模拟相结合，阐明 Ti6Al-4V 合金与纯疲劳相比的冷驻疲劳机制。具体进展如下：(1)开发了一种基于金纳米层薄膜通过蒸汽辅助重塑产生的表面纳米级图案的数字图像相关性的高分辨率应变图方法。(2)自动化识别框架开发了称为ASSISL（自动滑移系统识别和滑移带应变定位分析）的滑移系统和评估滑移带应变定位。（3）该框架用于量化纯疲劳和驻留疲劳之间应变分配的差异。

项目成果

Pure fatigue and dwell-fatigue study on forged Ti-6Al-4V alloys through slip analysis by high resolution digital image correlation

通过高分辨率数字图像相关滑移分析对锻造 Ti-6Al-4V 合金进行纯疲劳和驻留疲劳研究

• 发表时间: 2022
• 作者: 植松 英之，小泉 洸太郎，山口 綾香，山根 正睦，田上 秀一;胡 皓宇,ブリフォ・ファビャン,白岩 隆行,榎 学
• 通讯作者: 胡 皓宇,ブリフォ・ファビャン,白岩 隆行,榎 学

Automated slip system identification and strain analysis framework using high-resolution digital image correlation data: Application to a bimodal Ti-6Al-4V alloy

使用高分辨率数字图像相关数据的自动滑移系统识别和应变分析框架：在双峰 Ti-6Al-4V 合金中的应用

• DOI: 10.1016/j.ijplas.2023.103618
• 发表时间: 2023
• 期刊: International Journal of Plasticity
• 影响因子: 9.8
• 作者: Hu Haoyu;Briffod Fabien;Shiraiwa Takayuki;Enoki Manabu
• 通讯作者: Enoki Manabu

An automated slip system identification and strain analysis framework using high-resolution digital image correlation in of bimodal Ti-6Al-4V alloys

使用双峰 Ti-6Al-4V 合金高分辨率数字图像相关性的自动滑移系统识别和应变分析框架

• 发表时间: 2023
• 作者: 上杉瑠太;松田聡;中野晋也;山田和義;柿部剛史;岸肇;Ishikawa Ryo Shibata Naoya Ikuhara Yuichi;Haoyu Hu,Fabien Briffod,Takayuki Shiraiwa,Manabu Enoki
• 通讯作者: Haoyu Hu,Fabien Briffod,Takayuki Shiraiwa,Manabu Enoki

Comparison of fatigue crack prediction model in rolled Ti-6Al-4V alloys by acoustic emission parameters

声发射参数对轧制 Ti-6Al-4V 合金疲劳裂纹预测模型的比较

• 发表时间: 2023
• 作者: Amino Kyosei;Briffod Fabien;Shiraiwa Takayuki and Enoki Manabu
• 通讯作者: Shiraiwa Takayuki and Enoki Manabu

Evaluation of scattering of fatigue propagation in Ti-6Al-4V alloys using Acoustic emission method

使用声发射法评估 Ti-6Al-4V 合金中疲劳传播的散射

• 发表时间: 2022
• 作者: Amino Kyosei;Briffod Fabien;Shiraiwa Takayuki and Enoki Manabu
• 通讯作者: Shiraiwa Takayuki and Enoki Manabu