Effect of Mg Content and Heat Treatment on the Mechanical Properties of Low Pressure Die-Cast 380 Alloy
The present study was carried out on a 380 alloy containing 9.13% Si, 3.22% Cu, 1.01% Fe, 0.06% Mg, 0.16% Mn, and 2.28% Zn. The magnesium level was increased to 0.3 and 0.55%, by adding pure Mg to the melt. Tensile and fatigue samples were produced using low pressure die casting. The results show th...
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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/10.1155/2016/7841380 |
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| author | S. Morin E. M. Elgallad H. W. Doty S. Valtierra F. H. Samuel |
| author_facet | S. Morin E. M. Elgallad H. W. Doty S. Valtierra F. H. Samuel |
| author_sort | S. Morin |
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| description | The present study was carried out on a 380 alloy containing 9.13% Si, 3.22% Cu, 1.01% Fe, 0.06% Mg, 0.16% Mn, and 2.28% Zn. The magnesium level was increased to 0.3 and 0.55%, by adding pure Mg to the melt. Tensile and fatigue samples were produced using low pressure die casting. The results show that the average dendrite arm spacing was about 6 μm. Increasing the amount of Mg from 0.06% to 0.55% increased the volume fraction of π-Al8Mg3FeSi6 and Q-Al5Cu2Mg8Si6 phases from 0.8% to 1.7%. Following solutionizing at 490°C for 8 h, the maximum ultimate tensile strength was obtained from alloys containing 0.3% Mg. Further increases in Mg content resulted in an increase in the amount of insoluble intermetallics and, hence, low tensile strength. Aging at 155°C for times up to 25 h resulted in a linear increase in the alloy strength regardless of the amount of added Mg. Aging at 220°C, however, revealed multiple peaks corresponding to the precipitation of various phases. A good relation between the applied force and the number of cycles prior to failure was established. The alloy containing 0.3% Mg produced the best fatigue resistance. The effect of porosity was more pronounced on the fatigue samples than on the tensile bars. |
| format | Article |
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| 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-df4d5eee4fc64b1485e554ed34af43cf2025-02-03T01:03:29ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422016-01-01201610.1155/2016/78413807841380Effect of Mg Content and Heat Treatment on the Mechanical Properties of Low Pressure Die-Cast 380 AlloyS. Morin0E. M. Elgallad1H. W. Doty2S. Valtierra3F. H. Samuel4Université du Québec à Chicoutimi, Saguenay, QC, CanadaUniversité du Québec à Chicoutimi, Saguenay, QC, CanadaGeneral Motors, Materials Engineering, 823 Joslyn Avenue, Pontiac, MI 48340, USACorporativo Nemak, S.A. de C.V., P.O. Box 100, 66221 Garza Garcia, NL, MexicoUniversité du Québec à Chicoutimi, Saguenay, QC, CanadaThe present study was carried out on a 380 alloy containing 9.13% Si, 3.22% Cu, 1.01% Fe, 0.06% Mg, 0.16% Mn, and 2.28% Zn. The magnesium level was increased to 0.3 and 0.55%, by adding pure Mg to the melt. Tensile and fatigue samples were produced using low pressure die casting. The results show that the average dendrite arm spacing was about 6 μm. Increasing the amount of Mg from 0.06% to 0.55% increased the volume fraction of π-Al8Mg3FeSi6 and Q-Al5Cu2Mg8Si6 phases from 0.8% to 1.7%. Following solutionizing at 490°C for 8 h, the maximum ultimate tensile strength was obtained from alloys containing 0.3% Mg. Further increases in Mg content resulted in an increase in the amount of insoluble intermetallics and, hence, low tensile strength. Aging at 155°C for times up to 25 h resulted in a linear increase in the alloy strength regardless of the amount of added Mg. Aging at 220°C, however, revealed multiple peaks corresponding to the precipitation of various phases. A good relation between the applied force and the number of cycles prior to failure was established. The alloy containing 0.3% Mg produced the best fatigue resistance. The effect of porosity was more pronounced on the fatigue samples than on the tensile bars.http://dx.doi.org/10.1155/2016/7841380 |
| spellingShingle | S. Morin E. M. Elgallad H. W. Doty S. Valtierra F. H. Samuel Effect of Mg Content and Heat Treatment on the Mechanical Properties of Low Pressure Die-Cast 380 Alloy Advances in Materials Science and Engineering |
| title | Effect of Mg Content and Heat Treatment on the Mechanical Properties of Low Pressure Die-Cast 380 Alloy |
| title_full | Effect of Mg Content and Heat Treatment on the Mechanical Properties of Low Pressure Die-Cast 380 Alloy |
| title_fullStr | Effect of Mg Content and Heat Treatment on the Mechanical Properties of Low Pressure Die-Cast 380 Alloy |
| title_full_unstemmed | Effect of Mg Content and Heat Treatment on the Mechanical Properties of Low Pressure Die-Cast 380 Alloy |
| title_short | Effect of Mg Content and Heat Treatment on the Mechanical Properties of Low Pressure Die-Cast 380 Alloy |
| title_sort | effect of mg content and heat treatment on the mechanical properties of low pressure die cast 380 alloy |
| url | http://dx.doi.org/10.1155/2016/7841380 |
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