Effects of Cold Expansion on Residual Stress of 7050 Aluminium Alloy Frame Forging
Regulation of residual stress in a component is the key to improving its service performance. A cold expansion method was proposed for reducing the residual stress in 7050 aluminium alloy curved frame forging after quenching. The effect of the cold expansion method on the residual stress and equival...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/4/732 |
| _version_ | 1827744424415723520 |
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| author | Hai Gong Xiaoliang Sun Tao Zhang Hua Tang |
| author_facet | Hai Gong Xiaoliang Sun Tao Zhang Hua Tang |
| author_sort | Hai Gong |
| collection | DOAJ |
| description | Regulation of residual stress in a component is the key to improving its service performance. A cold expansion method was proposed for reducing the residual stress in 7050 aluminium alloy curved frame forging after quenching. The effect of the cold expansion method on the residual stress and equivalent plastic strain distribution of the 7050 aluminium alloy curved frame forging was investigated. The results showed that the maximum residual stress at the center thickness was reduced from 153 MPa to 94 MPa after the cold expansion, while it decreased from 283 MPa to 120 MPa at the surface with the highest stress reduction rate of 86.2%. The stress uniformity in the final forming region of the forging was improved. The equivalent plastic strain of the forging gradually decreases from the center to each side along the diameter of the expanded hole in cold expansion. The stress reduction effect matched with the distribution of equivalent plastic strain. The surface stress of the forging measured by x-rays diffraction (XRD) method was in agreement with the simulation results, and the reliability of the numerical model was verified. The cold expansion method can effectively reduce the quenched residual stress in curved frame forging. |
| first_indexed | 2024-03-11T04:44:36Z |
| format | Article |
| id | doaj.art-67bb797993cf45fe8d6e85824077511f |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-11T04:44:36Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-67bb797993cf45fe8d6e85824077511f2023-11-17T20:26:55ZengMDPI AGMetals2075-47012023-04-0113473210.3390/met13040732Effects of Cold Expansion on Residual Stress of 7050 Aluminium Alloy Frame ForgingHai Gong0Xiaoliang Sun1Tao Zhang2Hua Tang3Light Alloy Research Institute, Central South University, Changsha 410083, ChinaLight Alloy Research Institute, Central South University, Changsha 410083, ChinaLight Alloy Research Institute, Central South University, Changsha 410083, ChinaCollege of Mechanical and Electrical Engineering, Central South University, Changsha 410083, ChinaRegulation of residual stress in a component is the key to improving its service performance. A cold expansion method was proposed for reducing the residual stress in 7050 aluminium alloy curved frame forging after quenching. The effect of the cold expansion method on the residual stress and equivalent plastic strain distribution of the 7050 aluminium alloy curved frame forging was investigated. The results showed that the maximum residual stress at the center thickness was reduced from 153 MPa to 94 MPa after the cold expansion, while it decreased from 283 MPa to 120 MPa at the surface with the highest stress reduction rate of 86.2%. The stress uniformity in the final forming region of the forging was improved. The equivalent plastic strain of the forging gradually decreases from the center to each side along the diameter of the expanded hole in cold expansion. The stress reduction effect matched with the distribution of equivalent plastic strain. The surface stress of the forging measured by x-rays diffraction (XRD) method was in agreement with the simulation results, and the reliability of the numerical model was verified. The cold expansion method can effectively reduce the quenched residual stress in curved frame forging.https://www.mdpi.com/2075-4701/13/4/732curved frame forgingcold expansion methodresidual stress7050 aluminium alloy |
| spellingShingle | Hai Gong Xiaoliang Sun Tao Zhang Hua Tang Effects of Cold Expansion on Residual Stress of 7050 Aluminium Alloy Frame Forging Metals curved frame forging cold expansion method residual stress 7050 aluminium alloy |
| title | Effects of Cold Expansion on Residual Stress of 7050 Aluminium Alloy Frame Forging |
| title_full | Effects of Cold Expansion on Residual Stress of 7050 Aluminium Alloy Frame Forging |
| title_fullStr | Effects of Cold Expansion on Residual Stress of 7050 Aluminium Alloy Frame Forging |
| title_full_unstemmed | Effects of Cold Expansion on Residual Stress of 7050 Aluminium Alloy Frame Forging |
| title_short | Effects of Cold Expansion on Residual Stress of 7050 Aluminium Alloy Frame Forging |
| title_sort | effects of cold expansion on residual stress of 7050 aluminium alloy frame forging |
| topic | curved frame forging cold expansion method residual stress 7050 aluminium alloy |
| url | https://www.mdpi.com/2075-4701/13/4/732 |
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