Mechanism and Effect Factor of Toughening of High-Speed Train Wheels
The wheel of high-speed trains requires high strength and hardness while imposing high demands on plasticity and toughness, resulting from the needs of working conditions. The fracture toughness KQ, as an important indicator of dynamics, often varies in the wheel, which affects the overall performan...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-07-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/13/14/8300 |
| _version_ | 1797590356888387584 |
|---|---|
| author | Tuosheng Jia Cuirong Liu Zhigang Shen Zhisheng Wu |
| author_facet | Tuosheng Jia Cuirong Liu Zhigang Shen Zhisheng Wu |
| author_sort | Tuosheng Jia |
| collection | DOAJ |
| description | The wheel of high-speed trains requires high strength and hardness while imposing high demands on plasticity and toughness, resulting from the needs of working conditions. The fracture toughness KQ, as an important indicator of dynamics, often varies in the wheel, which affects the overall performance of the wheel. This work performs tests and analyses on typical samples with large fracture differences in fracture toughness at the same position and uniformly distributed on the same wheel. The mechanism of fracture toughness fluctuation is investigated, and the factors affecting fracture toughness are identified. The test mainly focuses on macroperformance, microfracture morphology, inclusion category and shape influence, pearlite lamellar spacing, and pearlite block size. Optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), electron backscatter diffraction (EBSD), and quantitative metallographic technology were employed to investigate the mechanism and influence factors on fracture toughness fluctuation. The analysis shows that the width of the ductile laceration zone is directly correlated with the toughness, and the toughness level is influenced by the cleavage size, pearlite lamellar spacing, and pearlite block uniformity. |
| first_indexed | 2024-03-11T01:20:22Z |
| format | Article |
| id | doaj.art-2b92b08c253643788827859818e717bf |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T01:20:22Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-2b92b08c253643788827859818e717bf2023-11-18T18:11:10ZengMDPI AGApplied Sciences2076-34172023-07-011314830010.3390/app13148300Mechanism and Effect Factor of Toughening of High-Speed Train WheelsTuosheng Jia0Cuirong Liu1Zhigang Shen2Zhisheng Wu3Academy of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaAcademy of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaAcademy of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaAcademy of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaThe wheel of high-speed trains requires high strength and hardness while imposing high demands on plasticity and toughness, resulting from the needs of working conditions. The fracture toughness KQ, as an important indicator of dynamics, often varies in the wheel, which affects the overall performance of the wheel. This work performs tests and analyses on typical samples with large fracture differences in fracture toughness at the same position and uniformly distributed on the same wheel. The mechanism of fracture toughness fluctuation is investigated, and the factors affecting fracture toughness are identified. The test mainly focuses on macroperformance, microfracture morphology, inclusion category and shape influence, pearlite lamellar spacing, and pearlite block size. Optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), electron backscatter diffraction (EBSD), and quantitative metallographic technology were employed to investigate the mechanism and influence factors on fracture toughness fluctuation. The analysis shows that the width of the ductile laceration zone is directly correlated with the toughness, and the toughness level is influenced by the cleavage size, pearlite lamellar spacing, and pearlite block uniformity.https://www.mdpi.com/2076-3417/13/14/8300mechanismeffect factortougheninghigh-speed trainwheels |
| spellingShingle | Tuosheng Jia Cuirong Liu Zhigang Shen Zhisheng Wu Mechanism and Effect Factor of Toughening of High-Speed Train Wheels Applied Sciences mechanism effect factor toughening high-speed train wheels |
| title | Mechanism and Effect Factor of Toughening of High-Speed Train Wheels |
| title_full | Mechanism and Effect Factor of Toughening of High-Speed Train Wheels |
| title_fullStr | Mechanism and Effect Factor of Toughening of High-Speed Train Wheels |
| title_full_unstemmed | Mechanism and Effect Factor of Toughening of High-Speed Train Wheels |
| title_short | Mechanism and Effect Factor of Toughening of High-Speed Train Wheels |
| title_sort | mechanism and effect factor of toughening of high speed train wheels |
| topic | mechanism effect factor toughening high-speed train wheels |
| url | https://www.mdpi.com/2076-3417/13/14/8300 |
| work_keys_str_mv | AT tuoshengjia mechanismandeffectfactoroftougheningofhighspeedtrainwheels AT cuirongliu mechanismandeffectfactoroftougheningofhighspeedtrainwheels AT zhigangshen mechanismandeffectfactoroftougheningofhighspeedtrainwheels AT zhishengwu mechanismandeffectfactoroftougheningofhighspeedtrainwheels |