Microstructure and Mechanical Properties of ZK60 Mg Alloy Processed by Cyclic Expansion-Extrusion (CEE) at Different Temperatures
In this work, the cyclic expansion extrusion (CEE) process was applied to ZK60 Mg alloy. The correlation between the evolved microstructure and mechanical properties was investigated. The CEE process was performed at a constant ram speed (15 mm/min) and at different processing temperatures (190, 270...
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| Format: | Article |
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Unviversity of Technology- Iraq
2022-12-01
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| Series: | Engineering and Technology Journal |
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| Online Access: | https://etj.uotechnology.edu.iq/article_174993_8c3d3c2bff1cd3b788f5d2cba4787a33.pdf |
| _version_ | 1797337706909401088 |
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| author | Ahmed Marheb Akeel Subhi |
| author_facet | Ahmed Marheb Akeel Subhi |
| author_sort | Ahmed Marheb |
| collection | DOAJ |
| description | In this work, the cyclic expansion extrusion (CEE) process was applied to ZK60 Mg alloy. The correlation between the evolved microstructure and mechanical properties was investigated. The CEE process was performed at a constant ram speed (15 mm/min) and at different processing temperatures (190, 270, and 350 °C). Optical and scanning electron microscopes, X-ray diffraction instruments, Vickers hardness tester, and tensile testing machine were utilized to examine the influence of CEE processing temperature on the characteristics of ZK60 Mg alloy. The XRD analysis showed that two phases were presented in the matrix of ZK60 Mg alloy, namely α-Mg and MgZn2, in small amounts. The CEE process reduced the size of α-Mg grains due to dynamic recrystallization, especially at the processing temperature of 190 °C. A slight coarsening of the α-Mg grains was observed with increasing processing temperature to 270 and 350 °C. The hardness value of ZK60 Mg alloy was enhanced by about 11 to 19% using the CEE process compared to the as-extruded sample. The processing temperature greatly affected the mechanical properties, where a significant improvement of about 24% yield strength, 9% ultimate tensile strength, and 38% elongation was observed using a processing temperature of 190 °C. The characterization of the tensile fracture surface of the tested samples indicated that the ductile-brittle fracture mode was responsible for the failure. |
| first_indexed | 2024-03-08T09:16:30Z |
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| id | doaj.art-c17b87e819f145d7b7de654735c6e0a7 |
| institution | Directory Open Access Journal |
| issn | 1681-6900 2412-0758 |
| language | English |
| last_indexed | 2024-03-08T09:16:30Z |
| publishDate | 2022-12-01 |
| publisher | Unviversity of Technology- Iraq |
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| series | Engineering and Technology Journal |
| spelling | doaj.art-c17b87e819f145d7b7de654735c6e0a72024-01-31T14:28:01ZengUnviversity of Technology- IraqEngineering and Technology Journal1681-69002412-07582022-12-0140121624163010.30684/etj.2022.133572.1194174993Microstructure and Mechanical Properties of ZK60 Mg Alloy Processed by Cyclic Expansion-Extrusion (CEE) at Different TemperaturesAhmed Marheb0Akeel Subhi1Department of Production Engineering and Metallurgy, University of Technology, Baghdad-IraqDepartment of Production Engineering and Metallurgy, University of Technology, Baghdad-IraqIn this work, the cyclic expansion extrusion (CEE) process was applied to ZK60 Mg alloy. The correlation between the evolved microstructure and mechanical properties was investigated. The CEE process was performed at a constant ram speed (15 mm/min) and at different processing temperatures (190, 270, and 350 °C). Optical and scanning electron microscopes, X-ray diffraction instruments, Vickers hardness tester, and tensile testing machine were utilized to examine the influence of CEE processing temperature on the characteristics of ZK60 Mg alloy. The XRD analysis showed that two phases were presented in the matrix of ZK60 Mg alloy, namely α-Mg and MgZn2, in small amounts. The CEE process reduced the size of α-Mg grains due to dynamic recrystallization, especially at the processing temperature of 190 °C. A slight coarsening of the α-Mg grains was observed with increasing processing temperature to 270 and 350 °C. The hardness value of ZK60 Mg alloy was enhanced by about 11 to 19% using the CEE process compared to the as-extruded sample. The processing temperature greatly affected the mechanical properties, where a significant improvement of about 24% yield strength, 9% ultimate tensile strength, and 38% elongation was observed using a processing temperature of 190 °C. The characterization of the tensile fracture surface of the tested samples indicated that the ductile-brittle fracture mode was responsible for the failure.https://etj.uotechnology.edu.iq/article_174993_8c3d3c2bff1cd3b788f5d2cba4787a33.pdfzk60 mg alloycyclic expansion extrusiongrain refiningmechanical propertiestensile fracture surface |
| spellingShingle | Ahmed Marheb Akeel Subhi Microstructure and Mechanical Properties of ZK60 Mg Alloy Processed by Cyclic Expansion-Extrusion (CEE) at Different Temperatures Engineering and Technology Journal zk60 mg alloy cyclic expansion extrusion grain refining mechanical properties tensile fracture surface |
| title | Microstructure and Mechanical Properties of ZK60 Mg Alloy Processed by Cyclic Expansion-Extrusion (CEE) at Different Temperatures |
| title_full | Microstructure and Mechanical Properties of ZK60 Mg Alloy Processed by Cyclic Expansion-Extrusion (CEE) at Different Temperatures |
| title_fullStr | Microstructure and Mechanical Properties of ZK60 Mg Alloy Processed by Cyclic Expansion-Extrusion (CEE) at Different Temperatures |
| title_full_unstemmed | Microstructure and Mechanical Properties of ZK60 Mg Alloy Processed by Cyclic Expansion-Extrusion (CEE) at Different Temperatures |
| title_short | Microstructure and Mechanical Properties of ZK60 Mg Alloy Processed by Cyclic Expansion-Extrusion (CEE) at Different Temperatures |
| title_sort | microstructure and mechanical properties of zk60 mg alloy processed by cyclic expansion extrusion cee at different temperatures |
| topic | zk60 mg alloy cyclic expansion extrusion grain refining mechanical properties tensile fracture surface |
| url | https://etj.uotechnology.edu.iq/article_174993_8c3d3c2bff1cd3b788f5d2cba4787a33.pdf |
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