Effect of Thermal Exposure on Mechanical Properties of Al-Si-Cu-Ni-Mg Aluminum Alloy
The microstructure morphology and evolution of mechanical properties are investigated in this study. The results show that the phases displayed no clear change after thermal exposure at 250 °C for 200 h. The tensile strength of the as-cast alloy showed a downward trend in different degrees with the...
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MDPI AG
2023-01-01
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| Online Access: | https://www.mdpi.com/2073-4352/13/2/236 |
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| author | Fanming Chen Chengwen Liu Lijie Zuo Zhiyuan Wu Yiqiang He Kai Dong Guoqing Li Weiye He |
| author_facet | Fanming Chen Chengwen Liu Lijie Zuo Zhiyuan Wu Yiqiang He Kai Dong Guoqing Li Weiye He |
| author_sort | Fanming Chen |
| collection | DOAJ |
| description | The microstructure morphology and evolution of mechanical properties are investigated in this study. The results show that the phases displayed no clear change after thermal exposure at 250 °C for 200 h. The tensile strength of the as-cast alloy showed a downward trend in different degrees with the increase in the tensile temperature, while the influence of elongation was opposite to the tensile strength. In addition, the tensile strength tended to be stable after thermal exposure at 250 °C for 100 h. The main creep mechanism of the as-cast alloy at a low temperature and low stress (T ≤ 250 °C; <i>σ</i> ≤ 40 MPa) is grain-boundary creep. The Monkman–Grant empirical formula was used to fit the relationship between the creep life and the minimum creep rate, and the fitting results are:<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo> </mo><msub><mi>t</mi><mi>r</mi></msub><mi>·</mi><msubsup><mover accent="true"><mi>ε</mi><mo>˙</mo></mover><mrow><mi>m</mi><mi>i</mi><mi>n</mi></mrow><mrow><mn>0.95</mn></mrow></msubsup><mo>=</mo><mn>0.207</mn></mrow></semantics></math></inline-formula>. |
| first_indexed | 2024-03-11T08:57:34Z |
| format | Article |
| id | doaj.art-0dee916a051b4e60bec62b45675f7d52 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-11T08:57:34Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-0dee916a051b4e60bec62b45675f7d522023-11-16T19:55:24ZengMDPI AGCrystals2073-43522023-01-0113223610.3390/cryst13020236Effect of Thermal Exposure on Mechanical Properties of Al-Si-Cu-Ni-Mg Aluminum AlloyFanming Chen0Chengwen Liu1Lijie Zuo2Zhiyuan Wu3Yiqiang He4Kai Dong5Guoqing Li6Weiye He7School of Mechanical Engineering, Jiangsu Ocean University, Lianyungang 222005, ChinaSchool of Mechanical Engineering, Jiangsu Ocean University, Lianyungang 222005, ChinaSchool of Mechanical Engineering, Jiangsu Ocean University, Lianyungang 222005, ChinaSchool of Mechanical Engineering, Jiangsu Ocean University, Lianyungang 222005, ChinaSchool of Mechanical Engineering, Jiangsu Ocean University, Lianyungang 222005, ChinaSchool of Mechanical Engineering, Jiangsu Ocean University, Lianyungang 222005, ChinaSchool of Mechanical Engineering, Jiangsu Ocean University, Lianyungang 222005, ChinaSchool of Mechanical Engineering, Jiangsu Ocean University, Lianyungang 222005, ChinaThe microstructure morphology and evolution of mechanical properties are investigated in this study. The results show that the phases displayed no clear change after thermal exposure at 250 °C for 200 h. The tensile strength of the as-cast alloy showed a downward trend in different degrees with the increase in the tensile temperature, while the influence of elongation was opposite to the tensile strength. In addition, the tensile strength tended to be stable after thermal exposure at 250 °C for 100 h. The main creep mechanism of the as-cast alloy at a low temperature and low stress (T ≤ 250 °C; <i>σ</i> ≤ 40 MPa) is grain-boundary creep. The Monkman–Grant empirical formula was used to fit the relationship between the creep life and the minimum creep rate, and the fitting results are:<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo> </mo><msub><mi>t</mi><mi>r</mi></msub><mi>·</mi><msubsup><mover accent="true"><mi>ε</mi><mo>˙</mo></mover><mrow><mi>m</mi><mi>i</mi><mi>n</mi></mrow><mrow><mn>0.95</mn></mrow></msubsup><mo>=</mo><mn>0.207</mn></mrow></semantics></math></inline-formula>.https://www.mdpi.com/2073-4352/13/2/236thermal exposurecasting alloysmechanical propertiescreep mechanism |
| spellingShingle | Fanming Chen Chengwen Liu Lijie Zuo Zhiyuan Wu Yiqiang He Kai Dong Guoqing Li Weiye He Effect of Thermal Exposure on Mechanical Properties of Al-Si-Cu-Ni-Mg Aluminum Alloy Crystals thermal exposure casting alloys mechanical properties creep mechanism |
| title | Effect of Thermal Exposure on Mechanical Properties of Al-Si-Cu-Ni-Mg Aluminum Alloy |
| title_full | Effect of Thermal Exposure on Mechanical Properties of Al-Si-Cu-Ni-Mg Aluminum Alloy |
| title_fullStr | Effect of Thermal Exposure on Mechanical Properties of Al-Si-Cu-Ni-Mg Aluminum Alloy |
| title_full_unstemmed | Effect of Thermal Exposure on Mechanical Properties of Al-Si-Cu-Ni-Mg Aluminum Alloy |
| title_short | Effect of Thermal Exposure on Mechanical Properties of Al-Si-Cu-Ni-Mg Aluminum Alloy |
| title_sort | effect of thermal exposure on mechanical properties of al si cu ni mg aluminum alloy |
| topic | thermal exposure casting alloys mechanical properties creep mechanism |
| url | https://www.mdpi.com/2073-4352/13/2/236 |
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