A multiscale crystal plasticity-multistage fatigue coupling framework for prediction of low-cycle fatigue life in laser additively manufactured titanium alloy
Existing aerospace fatigue life models inadequately predict high-strain cycle failures in TC11 titanium alloys due to overlooked dynamic microstructural evolution and multiscale damage, undermining critical airframe safety assessments. This study introduces a novel multiscale framework that synergis...
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Taylor & Francis Group
2025-12-01
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| Series: | Virtual and Physical Prototyping |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/17452759.2025.2521103 |
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| author | Ning Guo Jiang Yu Qingjun Zhou Jilai Wang Guangchun Xiao Bingtao Tang Zhongguo Zhang |
| author_facet | Ning Guo Jiang Yu Qingjun Zhou Jilai Wang Guangchun Xiao Bingtao Tang Zhongguo Zhang |
| author_sort | Ning Guo |
| collection | DOAJ |
| description | Existing aerospace fatigue life models inadequately predict high-strain cycle failures in TC11 titanium alloys due to overlooked dynamic microstructural evolution and multiscale damage, undermining critical airframe safety assessments. This study introduces a novel multiscale framework that synergistically integrates microstructure-sensitive crystal plasticity (CP) with a multistage fatigue (MSF) model to accurately predict the low-cycle fatigue (LCF) life of TC11 alloy fabricated via laser powder-directed energy deposition (LP-DED). The CP-MSF model synergistically integrates microstructure deformation mechanisms and heterogeneous plasticity-induced damage evolution from CP analysis with MSF's multiscale variable transmission framework, establishing a holistic framework that quantitatively captures dynamic microstructure evolution, crack nucleation-propagation transitions, and scale-dependent damage interactions. The validity of the proposed framework was tested against strain-life curves, demonstrating a mean prediction error about 4.6% across a range of strain amplitudes (0.4%–1.2%). This study further elucidates the individual contributions of microstructure morphology, α lath size and micro-orientation to LCF lifetime. Notably, the presence of basketweave microstructure and coarse α laths significantly enhances LCF life, whereas the micro-orientation has less effect. Additionally, Schmid factor (SF) analyses and intragranular misorientation axes (IGMA) investigations identified Pyramidal I slip as the predominant deformation mechanism under cyclic loading. |
| format | Article |
| id | doaj-art-e9f4971d1e664771bd00df37edb895ee |
| institution | Kabale University |
| issn | 1745-2759 1745-2767 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Virtual and Physical Prototyping |
| spelling | doaj-art-e9f4971d1e664771bd00df37edb895ee2025-08-20T03:24:07ZengTaylor & Francis GroupVirtual and Physical Prototyping1745-27591745-27672025-12-0120110.1080/17452759.2025.2521103A multiscale crystal plasticity-multistage fatigue coupling framework for prediction of low-cycle fatigue life in laser additively manufactured titanium alloyNing Guo0Jiang Yu1Qingjun Zhou2Jilai Wang3Guangchun Xiao4Bingtao Tang5Zhongguo Zhang6School of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, People’s Republic of ChinaSchool of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, People’s Republic of ChinaCapital Aerospace Machinery Co., Ltd., Beijing, People’s Republic of ChinaSchool of Mechanical Engineering, Shandong University, Jinan, People’s Republic of ChinaSchool of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, People’s Republic of ChinaSchool of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, People’s Republic of ChinaShandong Toget Brake System Co. Ltd., Zaozhuang, People’s Republic of ChinaExisting aerospace fatigue life models inadequately predict high-strain cycle failures in TC11 titanium alloys due to overlooked dynamic microstructural evolution and multiscale damage, undermining critical airframe safety assessments. This study introduces a novel multiscale framework that synergistically integrates microstructure-sensitive crystal plasticity (CP) with a multistage fatigue (MSF) model to accurately predict the low-cycle fatigue (LCF) life of TC11 alloy fabricated via laser powder-directed energy deposition (LP-DED). The CP-MSF model synergistically integrates microstructure deformation mechanisms and heterogeneous plasticity-induced damage evolution from CP analysis with MSF's multiscale variable transmission framework, establishing a holistic framework that quantitatively captures dynamic microstructure evolution, crack nucleation-propagation transitions, and scale-dependent damage interactions. The validity of the proposed framework was tested against strain-life curves, demonstrating a mean prediction error about 4.6% across a range of strain amplitudes (0.4%–1.2%). This study further elucidates the individual contributions of microstructure morphology, α lath size and micro-orientation to LCF lifetime. Notably, the presence of basketweave microstructure and coarse α laths significantly enhances LCF life, whereas the micro-orientation has less effect. Additionally, Schmid factor (SF) analyses and intragranular misorientation axes (IGMA) investigations identified Pyramidal I slip as the predominant deformation mechanism under cyclic loading.https://www.tandfonline.com/doi/10.1080/17452759.2025.2521103Laser additively manufacturingtitanium alloycrystal plasticityfatigue damagelow-cycle fatigue life |
| spellingShingle | Ning Guo Jiang Yu Qingjun Zhou Jilai Wang Guangchun Xiao Bingtao Tang Zhongguo Zhang A multiscale crystal plasticity-multistage fatigue coupling framework for prediction of low-cycle fatigue life in laser additively manufactured titanium alloy Virtual and Physical Prototyping Laser additively manufacturing titanium alloy crystal plasticity fatigue damage low-cycle fatigue life |
| title | A multiscale crystal plasticity-multistage fatigue coupling framework for prediction of low-cycle fatigue life in laser additively manufactured titanium alloy |
| title_full | A multiscale crystal plasticity-multistage fatigue coupling framework for prediction of low-cycle fatigue life in laser additively manufactured titanium alloy |
| title_fullStr | A multiscale crystal plasticity-multistage fatigue coupling framework for prediction of low-cycle fatigue life in laser additively manufactured titanium alloy |
| title_full_unstemmed | A multiscale crystal plasticity-multistage fatigue coupling framework for prediction of low-cycle fatigue life in laser additively manufactured titanium alloy |
| title_short | A multiscale crystal plasticity-multistage fatigue coupling framework for prediction of low-cycle fatigue life in laser additively manufactured titanium alloy |
| title_sort | multiscale crystal plasticity multistage fatigue coupling framework for prediction of low cycle fatigue life in laser additively manufactured titanium alloy |
| topic | Laser additively manufacturing titanium alloy crystal plasticity fatigue damage low-cycle fatigue life |
| url | https://www.tandfonline.com/doi/10.1080/17452759.2025.2521103 |
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