Investigation of residual stress profiles induced by laser shock peening
This study compares the residual stresses formed on samples before Laser Shock Peening (LSP) and after mechanical relaxation of LSP. Sample material used in the analysis is Aluminum Alloy of grade 6061 with no prior heat treatments done. Experimental results on surface residual stresses were measure...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
Nanyang Technological University
2020
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/140770 |
| _version_ | 1811691576976474112 |
|---|---|
| author | Avinash Kumar Vijaya Kumar |
| author2 | Upadrasta Ramamurty |
| author_facet | Upadrasta Ramamurty Avinash Kumar Vijaya Kumar |
| author_sort | Avinash Kumar Vijaya Kumar |
| collection | NTU |
| description | This study compares the residual stresses formed on samples before Laser Shock Peening (LSP) and after mechanical relaxation of LSP. Sample material used in the analysis is Aluminum Alloy of grade 6061 with no prior heat treatments done. Experimental results on surface residual stresses were measured for samples of varying thicknesses of 3mm, 5mm and 10mm. To achieve more diverse results, different power densities were used in the experiments, 2.65, 1.33 and 1.15 GW/cm^2. Experimental procedures used to achieve mechanical relaxation of residual stresses were Axial fatigue test and 3-point bending test. It was observed, with the aid of an X-ray diffraction machine and Prism drilling, that there were significant increase in the fatigue life and improvements on the residual stress relaxation of the samples that has undergone the fatigue and 3-point bend test. |
| first_indexed | 2024-10-01T06:22:06Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/140770 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:22:06Z |
| publishDate | 2020 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1407702023-03-04T20:01:44Z Investigation of residual stress profiles induced by laser shock peening Avinash Kumar Vijaya Kumar Upadrasta Ramamurty School of Mechanical and Aerospace Engineering Advanced Remanufacturing and Technology Centre (ARTC) uram@ntu.edu.sg Engineering::Materials::Material testing and characterization Engineering::Materials::Metallic materials::Alloys Engineering::Mechanical engineering This study compares the residual stresses formed on samples before Laser Shock Peening (LSP) and after mechanical relaxation of LSP. Sample material used in the analysis is Aluminum Alloy of grade 6061 with no prior heat treatments done. Experimental results on surface residual stresses were measured for samples of varying thicknesses of 3mm, 5mm and 10mm. To achieve more diverse results, different power densities were used in the experiments, 2.65, 1.33 and 1.15 GW/cm^2. Experimental procedures used to achieve mechanical relaxation of residual stresses were Axial fatigue test and 3-point bending test. It was observed, with the aid of an X-ray diffraction machine and Prism drilling, that there were significant increase in the fatigue life and improvements on the residual stress relaxation of the samples that has undergone the fatigue and 3-point bend test. Bachelor of Engineering (Mechanical Engineering) 2020-06-02T02:14:11Z 2020-06-02T02:14:11Z 2020 Final Year Project (FYP) https://hdl.handle.net/10356/140770 en B004 - application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Materials::Material testing and characterization Engineering::Materials::Metallic materials::Alloys Engineering::Mechanical engineering Avinash Kumar Vijaya Kumar Investigation of residual stress profiles induced by laser shock peening |
| title | Investigation of residual stress profiles induced by laser shock peening |
| title_full | Investigation of residual stress profiles induced by laser shock peening |
| title_fullStr | Investigation of residual stress profiles induced by laser shock peening |
| title_full_unstemmed | Investigation of residual stress profiles induced by laser shock peening |
| title_short | Investigation of residual stress profiles induced by laser shock peening |
| title_sort | investigation of residual stress profiles induced by laser shock peening |
| topic | Engineering::Materials::Material testing and characterization Engineering::Materials::Metallic materials::Alloys Engineering::Mechanical engineering |
| url | https://hdl.handle.net/10356/140770 |
| work_keys_str_mv | AT avinashkumarvijayakumar investigationofresidualstressprofilesinducedbylasershockpeening |