Low cycle fatigue behavior and deformation mechanism of Ti–6Al–4V-0.55Fe alloy under the control of strain and stress amplitudes
The present study focuses on investigating the low cycle fatigue (LCF) behavior and cyclic deformation mechanism of Ti–6Al–4V-0.55Fe alloy under strain and stress control. Based on the results of this alloy under strain amplitudes and the corresponding stress amplitudes, the effect of tension-compre...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424025092 |
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| author | Yangyang Sun Feng Chen Shenwei Qian Hui Chang Wenshu Zhang Liang Feng Lian Zhou |
| author_facet | Yangyang Sun Feng Chen Shenwei Qian Hui Chang Wenshu Zhang Liang Feng Lian Zhou |
| author_sort | Yangyang Sun |
| collection | DOAJ |
| description | The present study focuses on investigating the low cycle fatigue (LCF) behavior and cyclic deformation mechanism of Ti–6Al–4V-0.55Fe alloy under strain and stress control. Based on the results of this alloy under strain amplitudes and the corresponding stress amplitudes, the effect of tension-compression asymmetry (TCA) on fatigue behavior and microstructure evolution was systematically discussed with transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD). The results show that under strain control, TCA has little effect on LCF behavior due to the negligible compressive mean stress. And the deformation mechanism is mainly determined by planar slip. While under stress control, the accumulation of significant unidirectional ratcheting strain caused by TCA is observed, resulting in extra heterogeneous plastic deformation and more fatigue damage, responsible for the reduction in fatigue life. However, under low stress amplitude (≤690 MPa), no ratcheting behavior occurs due to the constant strain amplitude (0.56%), which reduces the driving force of crack nucleation and prolongs fatigue life, compared with that under low strain amplitude (0.6%). |
| format | Article |
| id | doaj-art-9b000351684c4e108dd3d2b070f39fdc |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-9b000351684c4e108dd3d2b070f39fdc2024-12-26T08:55:07ZengElsevierJournal of Materials Research and Technology2238-78542024-11-013359515961Low cycle fatigue behavior and deformation mechanism of Ti–6Al–4V-0.55Fe alloy under the control of strain and stress amplitudesYangyang Sun0Feng Chen1Shenwei Qian2Hui Chang3Wenshu Zhang4Liang Feng5Lian Zhou6College of Materials Science and Engineering/Tech Institute for Advanced Materials, Nanjing Tech University, Nanjing, 211816, ChinaCollege of Materials Science and Engineering/Tech Institute for Advanced Materials, Nanjing Tech University, Nanjing, 211816, ChinaCollege of Materials Science and Engineering/Tech Institute for Advanced Materials, Nanjing Tech University, Nanjing, 211816, ChinaCollege of Materials Science and Engineering/Tech Institute for Advanced Materials, Nanjing Tech University, Nanjing, 211816, China; Shangji Institute for Advanced Materials (Nanjing) Co., LTD, Nanjing, 210046, China; Corresponding author. College of Materials Science and Engineering/Tech Institute for Advanced Materials, Nanjing Tech University, Nanjing, 211816, China.College of Materials Science and Engineering/Tech Institute for Advanced Materials, Nanjing Tech University, Nanjing, 211816, ChinaCollege of Materials Science and Engineering/Tech Institute for Advanced Materials, Nanjing Tech University, Nanjing, 211816, ChinaCollege of Materials Science and Engineering/Tech Institute for Advanced Materials, Nanjing Tech University, Nanjing, 211816, ChinaThe present study focuses on investigating the low cycle fatigue (LCF) behavior and cyclic deformation mechanism of Ti–6Al–4V-0.55Fe alloy under strain and stress control. Based on the results of this alloy under strain amplitudes and the corresponding stress amplitudes, the effect of tension-compression asymmetry (TCA) on fatigue behavior and microstructure evolution was systematically discussed with transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD). The results show that under strain control, TCA has little effect on LCF behavior due to the negligible compressive mean stress. And the deformation mechanism is mainly determined by planar slip. While under stress control, the accumulation of significant unidirectional ratcheting strain caused by TCA is observed, resulting in extra heterogeneous plastic deformation and more fatigue damage, responsible for the reduction in fatigue life. However, under low stress amplitude (≤690 MPa), no ratcheting behavior occurs due to the constant strain amplitude (0.56%), which reduces the driving force of crack nucleation and prolongs fatigue life, compared with that under low strain amplitude (0.6%).http://www.sciencedirect.com/science/article/pii/S2238785424025092Titanium alloyLow cycle fatigueTension-compression asymmetryRatcheting strainFatigue life |
| spellingShingle | Yangyang Sun Feng Chen Shenwei Qian Hui Chang Wenshu Zhang Liang Feng Lian Zhou Low cycle fatigue behavior and deformation mechanism of Ti–6Al–4V-0.55Fe alloy under the control of strain and stress amplitudes Journal of Materials Research and Technology Titanium alloy Low cycle fatigue Tension-compression asymmetry Ratcheting strain Fatigue life |
| title | Low cycle fatigue behavior and deformation mechanism of Ti–6Al–4V-0.55Fe alloy under the control of strain and stress amplitudes |
| title_full | Low cycle fatigue behavior and deformation mechanism of Ti–6Al–4V-0.55Fe alloy under the control of strain and stress amplitudes |
| title_fullStr | Low cycle fatigue behavior and deformation mechanism of Ti–6Al–4V-0.55Fe alloy under the control of strain and stress amplitudes |
| title_full_unstemmed | Low cycle fatigue behavior and deformation mechanism of Ti–6Al–4V-0.55Fe alloy under the control of strain and stress amplitudes |
| title_short | Low cycle fatigue behavior and deformation mechanism of Ti–6Al–4V-0.55Fe alloy under the control of strain and stress amplitudes |
| title_sort | low cycle fatigue behavior and deformation mechanism of ti 6al 4v 0 55fe alloy under the control of strain and stress amplitudes |
| topic | Titanium alloy Low cycle fatigue Tension-compression asymmetry Ratcheting strain Fatigue life |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424025092 |
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