Coupled Precipitation of Dual-Nanoprecipitates to Optimize Microstructural and Mechanical Properties of Cast Al–Cu–Mg–Mn Alloys via Modulating the Mn Contents
The effect of Mn content on the microstructure evolution and mechanical properties of Al–Cu–Mg–<i>x</i> Mn alloys at ambient temperature was investigated. The findings show that in the Mn-containing alloys at the as-cast state, the blocky primary T(Al<sub>20</sub>Cu<sub>...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-11-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/13/23/3038 |
| _version_ | 1797399793936367616 |
|---|---|
| author | Han Zhang Qitang Hao Xinlei Li Wentao Yu Yanqing Xue |
| author_facet | Han Zhang Qitang Hao Xinlei Li Wentao Yu Yanqing Xue |
| author_sort | Han Zhang |
| collection | DOAJ |
| description | The effect of Mn content on the microstructure evolution and mechanical properties of Al–Cu–Mg–<i>x</i> Mn alloys at ambient temperature was investigated. The findings show that in the Mn-containing alloys at the as-cast state, the blocky primary T(Al<sub>20</sub>Cu<sub>2</sub>Mn<sub>3</sub>) phase coexisting with the Al<sub>2</sub>Cu phase appeared. With the increase in Mn content, the majority of the Al<sub>2</sub>Cu phase dissolved, nd a minor amount of the T phase remained at the grain boundary after solution treatment. The rod-like T<sub>Mn</sub> (Al<sub>20</sub>Cu<sub>2</sub>Mn<sub>3</sub>) nanoprecipitate was simultaneously distributed at grain boundaries and the interiors, while a high density of needle-like θ″ (Al<sub>3</sub>Cu) nanoprecipitate was also observed in the T6 state. Further increases in Mn content promoted the dispersion of the T<sub>Mn</sub> phase and inhibited the growth and transformation of the θ″ phase. Tensile test results show that 0.7 wt.% Mn alloy had excellent mechanical properties at ambient temperature with ultimate tensile strength, yield strength, and fracture elongation of 498.7 MPa, 346.2 MPa, and 19.2%, respectively. The subsequent calculation of strengthening mechanisms elucidates that precipitation strengthening is the main reason for the increase in yield strength of Mn-containing alloys. |
| first_indexed | 2024-03-09T01:46:14Z |
| format | Article |
| id | doaj.art-a4d821af95fb4841991d860b9608d23b |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T01:46:14Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-a4d821af95fb4841991d860b9608d23b2023-12-08T15:22:58ZengMDPI AGNanomaterials2079-49912023-11-011323303810.3390/nano13233038Coupled Precipitation of Dual-Nanoprecipitates to Optimize Microstructural and Mechanical Properties of Cast Al–Cu–Mg–Mn Alloys via Modulating the Mn ContentsHan Zhang0Qitang Hao1Xinlei Li2Wentao Yu3Yanqing Xue4State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, ChinaShaanxi Key Laboratory of Surface Engineering and Remanufacturing, Xi’an University, Xi’an 710065, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, ChinaThe effect of Mn content on the microstructure evolution and mechanical properties of Al–Cu–Mg–<i>x</i> Mn alloys at ambient temperature was investigated. The findings show that in the Mn-containing alloys at the as-cast state, the blocky primary T(Al<sub>20</sub>Cu<sub>2</sub>Mn<sub>3</sub>) phase coexisting with the Al<sub>2</sub>Cu phase appeared. With the increase in Mn content, the majority of the Al<sub>2</sub>Cu phase dissolved, nd a minor amount of the T phase remained at the grain boundary after solution treatment. The rod-like T<sub>Mn</sub> (Al<sub>20</sub>Cu<sub>2</sub>Mn<sub>3</sub>) nanoprecipitate was simultaneously distributed at grain boundaries and the interiors, while a high density of needle-like θ″ (Al<sub>3</sub>Cu) nanoprecipitate was also observed in the T6 state. Further increases in Mn content promoted the dispersion of the T<sub>Mn</sub> phase and inhibited the growth and transformation of the θ″ phase. Tensile test results show that 0.7 wt.% Mn alloy had excellent mechanical properties at ambient temperature with ultimate tensile strength, yield strength, and fracture elongation of 498.7 MPa, 346.2 MPa, and 19.2%, respectively. The subsequent calculation of strengthening mechanisms elucidates that precipitation strengthening is the main reason for the increase in yield strength of Mn-containing alloys.https://www.mdpi.com/2079-4991/13/23/3038Al–Cu–Mg–Mn alloysnanoprecipitatesmicrostructuremechanical propertiesstrengthening mechanisms |
| spellingShingle | Han Zhang Qitang Hao Xinlei Li Wentao Yu Yanqing Xue Coupled Precipitation of Dual-Nanoprecipitates to Optimize Microstructural and Mechanical Properties of Cast Al–Cu–Mg–Mn Alloys via Modulating the Mn Contents Nanomaterials Al–Cu–Mg–Mn alloys nanoprecipitates microstructure mechanical properties strengthening mechanisms |
| title | Coupled Precipitation of Dual-Nanoprecipitates to Optimize Microstructural and Mechanical Properties of Cast Al–Cu–Mg–Mn Alloys via Modulating the Mn Contents |
| title_full | Coupled Precipitation of Dual-Nanoprecipitates to Optimize Microstructural and Mechanical Properties of Cast Al–Cu–Mg–Mn Alloys via Modulating the Mn Contents |
| title_fullStr | Coupled Precipitation of Dual-Nanoprecipitates to Optimize Microstructural and Mechanical Properties of Cast Al–Cu–Mg–Mn Alloys via Modulating the Mn Contents |
| title_full_unstemmed | Coupled Precipitation of Dual-Nanoprecipitates to Optimize Microstructural and Mechanical Properties of Cast Al–Cu–Mg–Mn Alloys via Modulating the Mn Contents |
| title_short | Coupled Precipitation of Dual-Nanoprecipitates to Optimize Microstructural and Mechanical Properties of Cast Al–Cu–Mg–Mn Alloys via Modulating the Mn Contents |
| title_sort | coupled precipitation of dual nanoprecipitates to optimize microstructural and mechanical properties of cast al cu mg mn alloys via modulating the mn contents |
| topic | Al–Cu–Mg–Mn alloys nanoprecipitates microstructure mechanical properties strengthening mechanisms |
| url | https://www.mdpi.com/2079-4991/13/23/3038 |
| work_keys_str_mv | AT hanzhang coupledprecipitationofdualnanoprecipitatestooptimizemicrostructuralandmechanicalpropertiesofcastalcumgmnalloysviamodulatingthemncontents AT qitanghao coupledprecipitationofdualnanoprecipitatestooptimizemicrostructuralandmechanicalpropertiesofcastalcumgmnalloysviamodulatingthemncontents AT xinleili coupledprecipitationofdualnanoprecipitatestooptimizemicrostructuralandmechanicalpropertiesofcastalcumgmnalloysviamodulatingthemncontents AT wentaoyu coupledprecipitationofdualnanoprecipitatestooptimizemicrostructuralandmechanicalpropertiesofcastalcumgmnalloysviamodulatingthemncontents AT yanqingxue coupledprecipitationofdualnanoprecipitatestooptimizemicrostructuralandmechanicalpropertiesofcastalcumgmnalloysviamodulatingthemncontents |