Effect of Microstructure on the Dimensional Stability of Extruded Pure Aluminum
High-performance extruded aluminum alloys with complex textures suffer significant dimension variation under environmental temperature fluctuations, dramatically decreasing the precision of navigation systems. This research mainly focuses on the effect of the texture of extruded pure aluminum on its...
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MDPI AG
2021-08-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/17/4797 |
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| author | Linlin Fu Gaohui Wu Chang Zhou Ziyang Xiu Wenshu Yang Jing Qiao |
| author_facet | Linlin Fu Gaohui Wu Chang Zhou Ziyang Xiu Wenshu Yang Jing Qiao |
| author_sort | Linlin Fu |
| collection | DOAJ |
| description | High-performance extruded aluminum alloys with complex textures suffer significant dimension variation under environmental temperature fluctuations, dramatically decreasing the precision of navigation systems. This research mainly focuses on the effect of the texture of extruded pure aluminum on its dimensional stability after various annealing processes. The result reveals that a significant increment in the area fraction of recrystallized grains with <100> orientation and a decrement in the area fraction of grains with <111> orientation were found with increasing annealing temperature. Moreover, with the annealing temperature increasing from 150 °C to 400 °C, the residual plastic strain after twelve thermal cycles with a temperature range of 120 °C was changed from −1.6 × 10<sup>−5</sup> to −4.5 × 10<sup>−5</sup>. The large amount of equiaxed grains with <100> orientation was formed in the microstructure of the extruded pure aluminum and the average grain size was decreased during thermal cycling. The area fraction of grain with <100> crystallographic orientation of the sample annealed at 400 °C after thermal cycling was 30.9% higher than annealed at 350 °C (23.7%) or at 150 °C (18.7%). It is attributed to the increase in the proportion of recrystallization grains with <100> direction as the annealing temperature increases, provided more nucleation sites for the formation of fine equiaxed grains with <100> orientation. The main orientation of the texture was rotated from parallel to <111> to parallel to <100> after thermal cycling. The change in the orientation of grains contributed to a change in interplanar spacing, which explains the change in the dimension along the extrusion direction during thermal cycling. |
| first_indexed | 2024-03-10T08:08:57Z |
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| id | doaj.art-919cde6e19354587ac2ec47ee13b1506 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T08:08:57Z |
| publishDate | 2021-08-01 |
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| series | Materials |
| spelling | doaj.art-919cde6e19354587ac2ec47ee13b15062023-11-22T10:51:47ZengMDPI AGMaterials1996-19442021-08-011417479710.3390/ma14174797Effect of Microstructure on the Dimensional Stability of Extruded Pure AluminumLinlin Fu0Gaohui Wu1Chang Zhou2Ziyang Xiu3Wenshu Yang4Jing Qiao5School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaHigh-performance extruded aluminum alloys with complex textures suffer significant dimension variation under environmental temperature fluctuations, dramatically decreasing the precision of navigation systems. This research mainly focuses on the effect of the texture of extruded pure aluminum on its dimensional stability after various annealing processes. The result reveals that a significant increment in the area fraction of recrystallized grains with <100> orientation and a decrement in the area fraction of grains with <111> orientation were found with increasing annealing temperature. Moreover, with the annealing temperature increasing from 150 °C to 400 °C, the residual plastic strain after twelve thermal cycles with a temperature range of 120 °C was changed from −1.6 × 10<sup>−5</sup> to −4.5 × 10<sup>−5</sup>. The large amount of equiaxed grains with <100> orientation was formed in the microstructure of the extruded pure aluminum and the average grain size was decreased during thermal cycling. The area fraction of grain with <100> crystallographic orientation of the sample annealed at 400 °C after thermal cycling was 30.9% higher than annealed at 350 °C (23.7%) or at 150 °C (18.7%). It is attributed to the increase in the proportion of recrystallization grains with <100> direction as the annealing temperature increases, provided more nucleation sites for the formation of fine equiaxed grains with <100> orientation. The main orientation of the texture was rotated from parallel to <111> to parallel to <100> after thermal cycling. The change in the orientation of grains contributed to a change in interplanar spacing, which explains the change in the dimension along the extrusion direction during thermal cycling.https://www.mdpi.com/1996-1944/14/17/4797extruded pure aluminumtextureannealingdimensional stabilitythermal cycling |
| spellingShingle | Linlin Fu Gaohui Wu Chang Zhou Ziyang Xiu Wenshu Yang Jing Qiao Effect of Microstructure on the Dimensional Stability of Extruded Pure Aluminum Materials extruded pure aluminum texture annealing dimensional stability thermal cycling |
| title | Effect of Microstructure on the Dimensional Stability of Extruded Pure Aluminum |
| title_full | Effect of Microstructure on the Dimensional Stability of Extruded Pure Aluminum |
| title_fullStr | Effect of Microstructure on the Dimensional Stability of Extruded Pure Aluminum |
| title_full_unstemmed | Effect of Microstructure on the Dimensional Stability of Extruded Pure Aluminum |
| title_short | Effect of Microstructure on the Dimensional Stability of Extruded Pure Aluminum |
| title_sort | effect of microstructure on the dimensional stability of extruded pure aluminum |
| topic | extruded pure aluminum texture annealing dimensional stability thermal cycling |
| url | https://www.mdpi.com/1996-1944/14/17/4797 |
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