Electromagnetic Stirring versus ECAP: Morphological Comparison of Al-Si-Cu Alloys to Make the Microstructural Refinement for Use in SSM Processing
This work evaluates the morphological evolution at the semisolid state of the Al-4.0wt%Si-2.5wt%Cu alloy produced by direct chill casting under electromagnetic stirring (EMS) and by one equal channel angular pressing (ECAP) pass. The ECAP emerged as a promising technique capable of reduction and hom...
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Wiley
2016-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/9789061 |
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| author | Luis Vanderlei Torres Luis Fernando Torres Eugênio José Zoqui |
| author_facet | Luis Vanderlei Torres Luis Fernando Torres Eugênio José Zoqui |
| author_sort | Luis Vanderlei Torres |
| collection | DOAJ |
| description | This work evaluates the morphological evolution at the semisolid state of the Al-4.0wt%Si-2.5wt%Cu alloy produced by direct chill casting under electromagnetic stirring (EMS) and by one equal channel angular pressing (ECAP) pass. The ECAP emerged as a promising technique capable of reduction and homogeneous metals microstructure imposing large deformations occurs in a matrix that contains two channels of the same cross-sectional area and forms an angle of 120°. The materials were submitted to reheating treatment in condition of 60% solid fraction at treatment times of 0, 30, and 90 s. Comparing the two cases, we have the presented ECAP process that had an excellent response to the recovery and recrystallization mechanisms, and refined microstructures ideal for thixoforming were produced. Primary particle sizes of about 45 μm and grain sizes of about 75 μm and a circularity shape factor of more than 0.60 were obtained. The low silicon alloy, Al-4.0wt%Si-2.5wt%Cu, presented excellent refinement when processed via equal channel angular pressing, presenting good morphological stability at the semisolid state, without significant changes in size or shape of the solid particles. This fully globular structure is favourable for thixoforming processes. |
| format | Article |
| id | doaj-art-177de3d4b5d043a297745852da74a8ee |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-177de3d4b5d043a297745852da74a8ee2025-08-20T03:54:33ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422016-01-01201610.1155/2016/97890619789061Electromagnetic Stirring versus ECAP: Morphological Comparison of Al-Si-Cu Alloys to Make the Microstructural Refinement for Use in SSM ProcessingLuis Vanderlei Torres0Luis Fernando Torres1Eugênio José Zoqui2Materials and Manufacturing Engineering Department (MMED), Faculty of Mechanical Engineering (FEM), University of Campinas (UNICAMP), 13083-860 Campinas, SP, BrazilMaterials and Manufacturing Engineering Department (MMED), Faculty of Mechanical Engineering (FEM), University of Campinas (UNICAMP), 13083-860 Campinas, SP, BrazilMaterials and Manufacturing Engineering Department (MMED), Faculty of Mechanical Engineering (FEM), University of Campinas (UNICAMP), 13083-860 Campinas, SP, BrazilThis work evaluates the morphological evolution at the semisolid state of the Al-4.0wt%Si-2.5wt%Cu alloy produced by direct chill casting under electromagnetic stirring (EMS) and by one equal channel angular pressing (ECAP) pass. The ECAP emerged as a promising technique capable of reduction and homogeneous metals microstructure imposing large deformations occurs in a matrix that contains two channels of the same cross-sectional area and forms an angle of 120°. The materials were submitted to reheating treatment in condition of 60% solid fraction at treatment times of 0, 30, and 90 s. Comparing the two cases, we have the presented ECAP process that had an excellent response to the recovery and recrystallization mechanisms, and refined microstructures ideal for thixoforming were produced. Primary particle sizes of about 45 μm and grain sizes of about 75 μm and a circularity shape factor of more than 0.60 were obtained. The low silicon alloy, Al-4.0wt%Si-2.5wt%Cu, presented excellent refinement when processed via equal channel angular pressing, presenting good morphological stability at the semisolid state, without significant changes in size or shape of the solid particles. This fully globular structure is favourable for thixoforming processes.http://dx.doi.org/10.1155/2016/9789061 |
| spellingShingle | Luis Vanderlei Torres Luis Fernando Torres Eugênio José Zoqui Electromagnetic Stirring versus ECAP: Morphological Comparison of Al-Si-Cu Alloys to Make the Microstructural Refinement for Use in SSM Processing Advances in Materials Science and Engineering |
| title | Electromagnetic Stirring versus ECAP: Morphological Comparison of Al-Si-Cu Alloys to Make the Microstructural Refinement for Use in SSM Processing |
| title_full | Electromagnetic Stirring versus ECAP: Morphological Comparison of Al-Si-Cu Alloys to Make the Microstructural Refinement for Use in SSM Processing |
| title_fullStr | Electromagnetic Stirring versus ECAP: Morphological Comparison of Al-Si-Cu Alloys to Make the Microstructural Refinement for Use in SSM Processing |
| title_full_unstemmed | Electromagnetic Stirring versus ECAP: Morphological Comparison of Al-Si-Cu Alloys to Make the Microstructural Refinement for Use in SSM Processing |
| title_short | Electromagnetic Stirring versus ECAP: Morphological Comparison of Al-Si-Cu Alloys to Make the Microstructural Refinement for Use in SSM Processing |
| title_sort | electromagnetic stirring versus ecap morphological comparison of al si cu alloys to make the microstructural refinement for use in ssm processing |
| url | http://dx.doi.org/10.1155/2016/9789061 |
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