Strengthening of Mg-6Al-1Zn Alloy via Simultaneous Loading and Aging
An obvious strengthening phenomenon has been observed in the Mg-6Al-1Zn (AZ61) alloy after simultaneous loading and aging at 170 °C. Being different to aging after pre-strain, the simultaneous loading and aging can obviously increase the yield stress of the alloy. Microstructural analysis shows that...
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MDPI AG
2022-04-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/8/2782 |
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| author | Jiejun He Lushu Wu |
| author_facet | Jiejun He Lushu Wu |
| author_sort | Jiejun He |
| collection | DOAJ |
| description | An obvious strengthening phenomenon has been observed in the Mg-6Al-1Zn (AZ61) alloy after simultaneous loading and aging at 170 °C. Being different to aging after pre-strain, the simultaneous loading and aging can obviously increase the yield stress of the alloy. Microstructural analysis shows that a larger quantity of the Al<sub>12</sub>Mg<sub>17</sub> can be obtained by simultaneous loading and aging in a relatively short aging time, compared with aging after pre-strain. It is speculated that the loading during aging is more beneficial for nucleation of the precipitates. In the same aging time, it is found that the sample subjected to simultaneous loading and aging shows a higher yield stress than the sample aged after pre-strain. To extend aging time, a large quantity of Al<sub>12</sub>Mg<sub>17</sub> can be obtained in the pre-strained sample. However, it is demonstrated that the yield stress of the sample subjected to aging after pre-strain is lower than that of the sample subjected to simultaneous loading and aging, despite these two samples containing the same quantity of precipitates. It is speculated that the occurrence of the precipitates plays a role in preventing dislocation gliding and twin expanding, thus leading to a strengthening effect. Additionally, atoms segregated in twin boundaries may partly strengthen the material. It is found that a large quantity of precipitates can be obtained in a relatively short aging time by using the simultaneous loading and aging, reducing the softening effect caused by aging. The observed phenomenon may provide a new strategy for strengthening magnesium alloys. |
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| format | Article |
| id | doaj.art-95148ca1a85c41f2a7e819e2e5d1c7b9 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T13:23:32Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-95148ca1a85c41f2a7e819e2e5d1c7b92023-11-30T21:27:34ZengMDPI AGMaterials1996-19442022-04-01158278210.3390/ma15082782Strengthening of Mg-6Al-1Zn Alloy via Simultaneous Loading and AgingJiejun He0Lushu Wu1School of Materials and Energy Engineering, Guizhou Institute of Technology, Guiyang 550003, ChinaSchool of Mechanical Engineering, Guizhou Institute of Technology, Guiyang 550003, ChinaAn obvious strengthening phenomenon has been observed in the Mg-6Al-1Zn (AZ61) alloy after simultaneous loading and aging at 170 °C. Being different to aging after pre-strain, the simultaneous loading and aging can obviously increase the yield stress of the alloy. Microstructural analysis shows that a larger quantity of the Al<sub>12</sub>Mg<sub>17</sub> can be obtained by simultaneous loading and aging in a relatively short aging time, compared with aging after pre-strain. It is speculated that the loading during aging is more beneficial for nucleation of the precipitates. In the same aging time, it is found that the sample subjected to simultaneous loading and aging shows a higher yield stress than the sample aged after pre-strain. To extend aging time, a large quantity of Al<sub>12</sub>Mg<sub>17</sub> can be obtained in the pre-strained sample. However, it is demonstrated that the yield stress of the sample subjected to aging after pre-strain is lower than that of the sample subjected to simultaneous loading and aging, despite these two samples containing the same quantity of precipitates. It is speculated that the occurrence of the precipitates plays a role in preventing dislocation gliding and twin expanding, thus leading to a strengthening effect. Additionally, atoms segregated in twin boundaries may partly strengthen the material. It is found that a large quantity of precipitates can be obtained in a relatively short aging time by using the simultaneous loading and aging, reducing the softening effect caused by aging. The observed phenomenon may provide a new strategy for strengthening magnesium alloys.https://www.mdpi.com/1996-1944/15/8/2782magnesium alloysagingprecipitatestrengthening |
| spellingShingle | Jiejun He Lushu Wu Strengthening of Mg-6Al-1Zn Alloy via Simultaneous Loading and Aging Materials magnesium alloys aging precipitate strengthening |
| title | Strengthening of Mg-6Al-1Zn Alloy via Simultaneous Loading and Aging |
| title_full | Strengthening of Mg-6Al-1Zn Alloy via Simultaneous Loading and Aging |
| title_fullStr | Strengthening of Mg-6Al-1Zn Alloy via Simultaneous Loading and Aging |
| title_full_unstemmed | Strengthening of Mg-6Al-1Zn Alloy via Simultaneous Loading and Aging |
| title_short | Strengthening of Mg-6Al-1Zn Alloy via Simultaneous Loading and Aging |
| title_sort | strengthening of mg 6al 1zn alloy via simultaneous loading and aging |
| topic | magnesium alloys aging precipitate strengthening |
| url | https://www.mdpi.com/1996-1944/15/8/2782 |
| work_keys_str_mv | AT jiejunhe strengtheningofmg6al1znalloyviasimultaneousloadingandaging AT lushuwu strengtheningofmg6al1znalloyviasimultaneousloadingandaging |