Microstructures and properties of welded joints of a Ti alloy
Titanium alloy Ti-6Al-4V is commonly used in aircraft structure. However, the material will result in defect after prolonged usage, such as pitting due to corrosion. To save cost from changing the whole structure, TIG beam-on-plate welding was used in this project to study the feasibility of using i...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2017
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/72274 |
| _version_ | 1826114475032313856 |
|---|---|
| author | Kang, Teck Loong |
| author2 | Zhou Wei |
| author_facet | Zhou Wei Kang, Teck Loong |
| author_sort | Kang, Teck Loong |
| collection | NTU |
| description | Titanium alloy Ti-6Al-4V is commonly used in aircraft structure. However, the material will result in defect after prolonged usage, such as pitting due to corrosion. To save cost from changing the whole structure, TIG beam-on-plate welding was used in this project to study the feasibility of using it to repair the defect. TIG welding is the most used fusion welding process for reactive metal such as titanium alloy, as it provides a shielding gas to prevent interstitial elements from reacting with the titanium alloy. The 3 mm thick annealed plate of Ti-6Al-4V with TIG beam-on-plate welding and tensile tested was used as the received material and the microstructure of the material was seen using optical microscope. Scanning electron microscope was used to observed the fracture surface after the tensile test. Shearing of the material and ductile fracture were seen when investigating the fracture surface. Scanning electron microscope was also used to observe microstructure at a higher magnification and microcracks were seen to be developed mostly at the α phase or α/β interface. |
| first_indexed | 2024-10-01T03:39:45Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/72274 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:39:45Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-10356/722742023-03-04T19:20:01Z Microstructures and properties of welded joints of a Ti alloy Kang, Teck Loong Zhou Wei School of Mechanical and Aerospace Engineering DRNTU::Engineering Titanium alloy Ti-6Al-4V is commonly used in aircraft structure. However, the material will result in defect after prolonged usage, such as pitting due to corrosion. To save cost from changing the whole structure, TIG beam-on-plate welding was used in this project to study the feasibility of using it to repair the defect. TIG welding is the most used fusion welding process for reactive metal such as titanium alloy, as it provides a shielding gas to prevent interstitial elements from reacting with the titanium alloy. The 3 mm thick annealed plate of Ti-6Al-4V with TIG beam-on-plate welding and tensile tested was used as the received material and the microstructure of the material was seen using optical microscope. Scanning electron microscope was used to observed the fracture surface after the tensile test. Shearing of the material and ductile fracture were seen when investigating the fracture surface. Scanning electron microscope was also used to observe microstructure at a higher magnification and microcracks were seen to be developed mostly at the α phase or α/β interface. Bachelor of Engineering (Mechanical Engineering) 2017-05-31T07:02:50Z 2017-05-31T07:02:50Z 2017 Final Year Project (FYP) http://hdl.handle.net/10356/72274 en Nanyang Technological University 58 p. application/pdf |
| spellingShingle | DRNTU::Engineering Kang, Teck Loong Microstructures and properties of welded joints of a Ti alloy |
| title | Microstructures and properties of welded joints of a Ti alloy |
| title_full | Microstructures and properties of welded joints of a Ti alloy |
| title_fullStr | Microstructures and properties of welded joints of a Ti alloy |
| title_full_unstemmed | Microstructures and properties of welded joints of a Ti alloy |
| title_short | Microstructures and properties of welded joints of a Ti alloy |
| title_sort | microstructures and properties of welded joints of a ti alloy |
| topic | DRNTU::Engineering |
| url | http://hdl.handle.net/10356/72274 |
| work_keys_str_mv | AT kangteckloong microstructuresandpropertiesofweldedjointsofatialloy |