Microstructure and Properties of 7A99 Aluminum Alloy Forging after Two-step Aging Treatment
Effects of two-step aging treatment on the microstructure and mechanical properties of 7A99 forged aluminum alloy were studied using optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), tensile test and fracture toughness test. The results show that af...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
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Journal of Aeronautical Materials
2018-02-01
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| Series: | Journal of Aeronautical Materials |
| Subjects: | |
| Online Access: | http://jam.biam.ac.cn/CN/Y2018/V38/I1/54 |
| _version_ | 1819099087895527424 |
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| author | WANG Shaohua MA Zhifeng ZHANG Xianfeng SUN Gang FENG Zhaohui LU Zheng |
| author_facet | WANG Shaohua MA Zhifeng ZHANG Xianfeng SUN Gang FENG Zhaohui LU Zheng |
| author_sort | WANG Shaohua |
| collection | DOAJ |
| description | Effects of two-step aging treatment on the microstructure and mechanical properties of 7A99 forged aluminum alloy were studied using optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), tensile test and fracture toughness test. The results show that after 120℃/4 h+165℃/8 h two-step aging treatment, the ultimate tensile strength, yield strength, elongation and electrical conductivity are 548 MPa, 513 MPa, 12.0% and 38.2% IACS, respectively. Meanwhile, the L-T toughness fracture is 30.5 MPa·m<sup>1/2</sup>.The fracture mode of the alloy is transgranular dimple fracture mechanism, and the major precipitates are η' and η phases under the aging condition. |
| first_indexed | 2024-12-22T00:41:19Z |
| format | Article |
| id | doaj.art-e7fa57420c0e4c9a90e5f6bd978b2a34 |
| institution | Directory Open Access Journal |
| issn | 1005-5053 1005-5053 |
| language | zho |
| last_indexed | 2024-12-22T00:41:19Z |
| publishDate | 2018-02-01 |
| publisher | Journal of Aeronautical Materials |
| record_format | Article |
| series | Journal of Aeronautical Materials |
| spelling | doaj.art-e7fa57420c0e4c9a90e5f6bd978b2a342022-12-21T18:44:40ZzhoJournal of Aeronautical MaterialsJournal of Aeronautical Materials1005-50531005-50532018-02-01381545910.11868/j.issn.1005-5053.2017.000072201801000072Microstructure and Properties of 7A99 Aluminum Alloy Forging after Two-step Aging TreatmentWANG Shaohua0MA Zhifeng1ZHANG Xianfeng2SUN Gang3FENG Zhaohui4LU Zheng5AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaAECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaAECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaAECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaAECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaAECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaEffects of two-step aging treatment on the microstructure and mechanical properties of 7A99 forged aluminum alloy were studied using optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), tensile test and fracture toughness test. The results show that after 120℃/4 h+165℃/8 h two-step aging treatment, the ultimate tensile strength, yield strength, elongation and electrical conductivity are 548 MPa, 513 MPa, 12.0% and 38.2% IACS, respectively. Meanwhile, the L-T toughness fracture is 30.5 MPa·m<sup>1/2</sup>.The fracture mode of the alloy is transgranular dimple fracture mechanism, and the major precipitates are η' and η phases under the aging condition.http://jam.biam.ac.cn/CN/Y2018/V38/I1/547A99 aluminum alloyforgingtwo-step agingmicrostructuremechanical properties |
| spellingShingle | WANG Shaohua MA Zhifeng ZHANG Xianfeng SUN Gang FENG Zhaohui LU Zheng Microstructure and Properties of 7A99 Aluminum Alloy Forging after Two-step Aging Treatment Journal of Aeronautical Materials 7A99 aluminum alloy forging two-step aging microstructure mechanical properties |
| title | Microstructure and Properties of 7A99 Aluminum Alloy Forging after Two-step Aging Treatment |
| title_full | Microstructure and Properties of 7A99 Aluminum Alloy Forging after Two-step Aging Treatment |
| title_fullStr | Microstructure and Properties of 7A99 Aluminum Alloy Forging after Two-step Aging Treatment |
| title_full_unstemmed | Microstructure and Properties of 7A99 Aluminum Alloy Forging after Two-step Aging Treatment |
| title_short | Microstructure and Properties of 7A99 Aluminum Alloy Forging after Two-step Aging Treatment |
| title_sort | microstructure and properties of 7a99 aluminum alloy forging after two step aging treatment |
| topic | 7A99 aluminum alloy forging two-step aging microstructure mechanical properties |
| url | http://jam.biam.ac.cn/CN/Y2018/V38/I1/54 |
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