Effect of Cutting Surface Integrity on Fatigue Properties of TC17 Titanium Alloy
The turning process of titanium alloy material will affect the surface structure of the material and lead to a change in its service life. In this paper, the fatigue behavior of the TC17 titanium alloy turning sample was studied through the bending fatigue test. The fatigue life variation rule under...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-08-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/16/16/5658 |
| _version_ | 1797583984366977024 |
|---|---|
| author | Dan Wang Xiyu Chen Xunqing Lai Guolong Zhao Yinfei Yang |
| author_facet | Dan Wang Xiyu Chen Xunqing Lai Guolong Zhao Yinfei Yang |
| author_sort | Dan Wang |
| collection | DOAJ |
| description | The turning process of titanium alloy material will affect the surface structure of the material and lead to a change in its service life. In this paper, the fatigue behavior of the TC17 titanium alloy turning sample was studied through the bending fatigue test. The fatigue life variation rule under the action of thermal coupling was then discussed. This revealed the fatigue fracture mechanism of TC17; the cracks originated from the surface of the source region, and the transient fault region was a ductile fracture. The mathematical model of turning parameters and surface integrity (roughness, microhardness and residual stress) was established, and the influence of turning parameters on fatigue life was analyzed with a mathematical relationship. Drawing a conclusion, the effects of turning parameters on fatigue life at normal temperature are as follows: Feed > Cutting depth > Cutting speed. The fatigue life of <i>v<sub>c</sub></i> = 30 m/min, <i>f</i> = 0.25 mm/r, <i>a<sub>p</sub></i> = 0.3 mm is only 40,586 cycles per week, the fatigue life of <i>v<sub>c</sub></i> = 30 m/min, <i>f</i> = 0.05 mm/r, <i>a<sub>p</sub></i> = 0.1 mm has 539,400 cycles per week, that is, the longest fatigue life is 16.6 times the smallest. Small cutting speed, feed, and large cut depth can be chosen based on ensuring practical processing efficiency. The fatigue fracture of the TC17 sample occurred after a certain cycle, and the fatigue fracture mechanism was revealed in this paper. |
| first_indexed | 2024-03-10T23:46:49Z |
| format | Article |
| id | doaj.art-c318e250c0c54558916fdc0e890d89a0 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T23:46:49Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-c318e250c0c54558916fdc0e890d89a02023-11-19T02:00:49ZengMDPI AGMaterials1996-19442023-08-011616565810.3390/ma16165658Effect of Cutting Surface Integrity on Fatigue Properties of TC17 Titanium AlloyDan Wang0Xiyu Chen1Xunqing Lai2Guolong Zhao3Yinfei Yang4College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, ChinaNanjing High Speed & Accurate Gear (Group) Co., Ltd., Nanjing 211100, ChinaCollege of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, ChinaCollege of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, ChinaCollege of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, ChinaThe turning process of titanium alloy material will affect the surface structure of the material and lead to a change in its service life. In this paper, the fatigue behavior of the TC17 titanium alloy turning sample was studied through the bending fatigue test. The fatigue life variation rule under the action of thermal coupling was then discussed. This revealed the fatigue fracture mechanism of TC17; the cracks originated from the surface of the source region, and the transient fault region was a ductile fracture. The mathematical model of turning parameters and surface integrity (roughness, microhardness and residual stress) was established, and the influence of turning parameters on fatigue life was analyzed with a mathematical relationship. Drawing a conclusion, the effects of turning parameters on fatigue life at normal temperature are as follows: Feed > Cutting depth > Cutting speed. The fatigue life of <i>v<sub>c</sub></i> = 30 m/min, <i>f</i> = 0.25 mm/r, <i>a<sub>p</sub></i> = 0.3 mm is only 40,586 cycles per week, the fatigue life of <i>v<sub>c</sub></i> = 30 m/min, <i>f</i> = 0.05 mm/r, <i>a<sub>p</sub></i> = 0.1 mm has 539,400 cycles per week, that is, the longest fatigue life is 16.6 times the smallest. Small cutting speed, feed, and large cut depth can be chosen based on ensuring practical processing efficiency. The fatigue fracture of the TC17 sample occurred after a certain cycle, and the fatigue fracture mechanism was revealed in this paper.https://www.mdpi.com/1996-1944/16/16/5658TC17 titanium alloyturningturning parametersfatigue life |
| spellingShingle | Dan Wang Xiyu Chen Xunqing Lai Guolong Zhao Yinfei Yang Effect of Cutting Surface Integrity on Fatigue Properties of TC17 Titanium Alloy Materials TC17 titanium alloy turning turning parameters fatigue life |
| title | Effect of Cutting Surface Integrity on Fatigue Properties of TC17 Titanium Alloy |
| title_full | Effect of Cutting Surface Integrity on Fatigue Properties of TC17 Titanium Alloy |
| title_fullStr | Effect of Cutting Surface Integrity on Fatigue Properties of TC17 Titanium Alloy |
| title_full_unstemmed | Effect of Cutting Surface Integrity on Fatigue Properties of TC17 Titanium Alloy |
| title_short | Effect of Cutting Surface Integrity on Fatigue Properties of TC17 Titanium Alloy |
| title_sort | effect of cutting surface integrity on fatigue properties of tc17 titanium alloy |
| topic | TC17 titanium alloy turning turning parameters fatigue life |
| url | https://www.mdpi.com/1996-1944/16/16/5658 |
| work_keys_str_mv | AT danwang effectofcuttingsurfaceintegrityonfatiguepropertiesoftc17titaniumalloy AT xiyuchen effectofcuttingsurfaceintegrityonfatiguepropertiesoftc17titaniumalloy AT xunqinglai effectofcuttingsurfaceintegrityonfatiguepropertiesoftc17titaniumalloy AT guolongzhao effectofcuttingsurfaceintegrityonfatiguepropertiesoftc17titaniumalloy AT yinfeiyang effectofcuttingsurfaceintegrityonfatiguepropertiesoftc17titaniumalloy |