Multiscale modelling of additively manufactured Ti-6Al-4V alloy: Fatigue performance evaluation from material to structural level

Chi, Weiqian; Wang, Wenjing; Zhou, Hongchang et al.

International Journal of Fatigue, 2025, 201, 109181

アクセス数:10件（2025-10-23 15:49 集計）

固定URL: https://hdl.handle.net/11094/102782

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タイトル
Multiscale modelling of additively manufactured Ti-6Al-4V alloy: Fatigue performance evaluation from material to structural level
著者
著者名
Chi, Weiqian
著者名
Wang, Wenjing
ORCID
0000-0002-2936-644X 0000-0002-2936-644X
researchmap permalink
zhou.hongchang zhou.hongchang
著者名
Zhou, Hongchang
著者名
Yan, Ruiguo
NRID
1000040397758 1000040397758
ORCID
0000-0002-7685-3152 0000-0002-7685-3152
researchmap permalink
read0134237 read0134237
Scopus Author ID
35318208400 35318208400
著者名
Mikami, Yoshiki
キーワード等
Fatigue behaviour
Hot Isostatic Pressing
Multiscale simulations
Structure-property relationship
Titanium alloy
内容
Chi W., Wang W., Zhou H., et al. Multiscale modelling of additively manufactured Ti-6Al-4V alloy: Fatigue performance evaluation from material to structural level. International Journal of Fatigue 201, 109181 (2025); https://doi.org/10.1016/j.ijfatigue.2025.109181.
抄録
Additively manufactured (AM) Ti-6Al-4V alloys face limitations in critical applications due to uncertainties in their fatigue performance. Despite extensive research on fatigue life prediction, the discrepancies in fatigue behaviour between AM structural components and material-level specimens remain poorly understood. In this study, the effect of hot isostatic pressing (HIP at 920 °C, 1000 bar Ar, 2 h) on the fatigue properties at both material and structural levels was investigated, aiming to bridge the gap in the cross-scale fatigue behaviour of AM Ti-6Al-4V alloys. Although HIP significantly improved microstructure and fatigue performance of material-level specimens, the presence of larger near-surface defects remained in the structural components, resulting in a poorer fatigue resistance. To quantitatively evaluate the impact of near-surface defects, a novel multiscale model for predicting fatigue behaviour of AM Ti-6Al-4V alloys was proposed. The model integrates finite element analysis with microstructural characteristics, where the grain boundaries (GBs) effect was quantified by the distance between GBs and the misorientations between adjacent grains. The input of this model requires only test conditions, tensile properties and microstructural information of the materials. The model was validated using S-N data from axial fatigue tests at both the material and structural levels, showing excellent correlation between predicted and experimental results. Overall, this study enhances the understanding of the relationship between processing techniques, microstructure and fatigue performance in AM alloys. Furthermore, it provides a multiscale analysis framework that integrates microstructural, material and structural information, offering a basis for the accurate prediction and design of fatigue-resistant AM components.
出版者
Elsevier Ltd
収録物名
International Journal of Fatigue
巻(号)
201
ページ
109181
刊行年月
2025-12-01
言語
英語
ハンドルURL
https://hdl.handle.net/11094/102782
PISSN
01421123
関連情報 (isIdenticalTo)
DOI (出版社版)
https://doi.org/10.1016/j.ijfatigue.2025.109181
アクセス権
open access
権利情報
This article is licensed under a Creative Commons Attribution 4.0 International License.
© 2025 The Authors
出版タイプ
Version of Record
カテゴリ
学術雑誌論文 Journal Article