The Influence of Cu Addition on Dispersoid Formation and Mechanical Properties of Al-Mn-Mg 3004 Alloy
The effect of Cu addition on dispersoid precipitation, mechanical properties and creep resistance was investigated in an Al-Mn-Mg 3004 alloy. The addition of Cu promoted dispersoid precipitation by increasing the number density and decreasing the size of dispersoids. Metastable β′-Mg2Si and Q-AlCuMg...
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MDPI AG
2018-03-01
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| Online Access: | http://www.mdpi.com/2075-4701/8/3/155 |
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| author | Zhen Li Zhan Zhang X.-Grant Chen |
| author_facet | Zhen Li Zhan Zhang X.-Grant Chen |
| author_sort | Zhen Li |
| collection | DOAJ |
| description | The effect of Cu addition on dispersoid precipitation, mechanical properties and creep resistance was investigated in an Al-Mn-Mg 3004 alloy. The addition of Cu promoted dispersoid precipitation by increasing the number density and decreasing the size of dispersoids. Metastable β′-Mg2Si and Q-AlCuMgSi precipitates were observed during the heating process and both could provide favorable nucleation sites for dispersoid precipitation. The addition of Cu improved the thermal stability of dispersoids during a long-term thermal holding at 350 °C for 500 h. Results of mechanical testing show that the addition of Cu remarkably improved the hardness at room temperature, as well as the yield strength and creep resistance at 300 °C, which was mainly attributed to dispersoid strengthening and Cu solid solution strengthening. The yield strength contribution at 300 °C was quantitatively evaluated based on the dispersoid, solid solution and matrix contributions. It was confirmed that dispersoid strengthening is the main strengthening mechanism in the experimental alloys. |
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| language | English |
| last_indexed | 2024-04-12T11:21:59Z |
| publishDate | 2018-03-01 |
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| spelling | doaj.art-1f15e5c7f45f429398b43f7204ec72a02022-12-22T03:35:20ZengMDPI AGMetals2075-47012018-03-018315510.3390/met8030155met8030155The Influence of Cu Addition on Dispersoid Formation and Mechanical Properties of Al-Mn-Mg 3004 AlloyZhen Li0Zhan Zhang1X.-Grant Chen2Department of Applied Science, University of Quebec at Chicoutimi, Saguenay, QC G7H 2B1, CanadaDepartment of Applied Science, University of Quebec at Chicoutimi, Saguenay, QC G7H 2B1, CanadaDepartment of Applied Science, University of Quebec at Chicoutimi, Saguenay, QC G7H 2B1, CanadaThe effect of Cu addition on dispersoid precipitation, mechanical properties and creep resistance was investigated in an Al-Mn-Mg 3004 alloy. The addition of Cu promoted dispersoid precipitation by increasing the number density and decreasing the size of dispersoids. Metastable β′-Mg2Si and Q-AlCuMgSi precipitates were observed during the heating process and both could provide favorable nucleation sites for dispersoid precipitation. The addition of Cu improved the thermal stability of dispersoids during a long-term thermal holding at 350 °C for 500 h. Results of mechanical testing show that the addition of Cu remarkably improved the hardness at room temperature, as well as the yield strength and creep resistance at 300 °C, which was mainly attributed to dispersoid strengthening and Cu solid solution strengthening. The yield strength contribution at 300 °C was quantitatively evaluated based on the dispersoid, solid solution and matrix contributions. It was confirmed that dispersoid strengthening is the main strengthening mechanism in the experimental alloys.http://www.mdpi.com/2075-4701/8/3/155Cu additiondispersoid strengtheningthermal stabilitydispersoid nucleationyield strengthcreep resistance |
| spellingShingle | Zhen Li Zhan Zhang X.-Grant Chen The Influence of Cu Addition on Dispersoid Formation and Mechanical Properties of Al-Mn-Mg 3004 Alloy Metals Cu addition dispersoid strengthening thermal stability dispersoid nucleation yield strength creep resistance |
| title | The Influence of Cu Addition on Dispersoid Formation and Mechanical Properties of Al-Mn-Mg 3004 Alloy |
| title_full | The Influence of Cu Addition on Dispersoid Formation and Mechanical Properties of Al-Mn-Mg 3004 Alloy |
| title_fullStr | The Influence of Cu Addition on Dispersoid Formation and Mechanical Properties of Al-Mn-Mg 3004 Alloy |
| title_full_unstemmed | The Influence of Cu Addition on Dispersoid Formation and Mechanical Properties of Al-Mn-Mg 3004 Alloy |
| title_short | The Influence of Cu Addition on Dispersoid Formation and Mechanical Properties of Al-Mn-Mg 3004 Alloy |
| title_sort | influence of cu addition on dispersoid formation and mechanical properties of al mn mg 3004 alloy |
| topic | Cu addition dispersoid strengthening thermal stability dispersoid nucleation yield strength creep resistance |
| url | http://www.mdpi.com/2075-4701/8/3/155 |
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