Effect of inert gas blowing on the microstructure and mechanical properties of semi-solid cast Al–20 %Mg2Si composite
The morphology and particle size of the primary Mg2Si intermetallic compounds significantly influence the mechanical properties of the in-situ Al–Mg2Si composite. This study investigates, for the first time, the effect of argon inert gas blowing in the semi-solid state or gas induced semi-solid (GIS...
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Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425017806 |
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| author | Moein G. Shabestari Ahad Nasimi Asl Saeed G. Shabestari |
| author_facet | Moein G. Shabestari Ahad Nasimi Asl Saeed G. Shabestari |
| author_sort | Moein G. Shabestari |
| collection | DOAJ |
| description | The morphology and particle size of the primary Mg2Si intermetallic compounds significantly influence the mechanical properties of the in-situ Al–Mg2Si composite. This study investigates, for the first time, the effect of argon inert gas blowing in the semi-solid state or gas induced semi-solid (GISS) at varying durations, flow rates, and temperatures on the microstructure, hardness, and tensile properties of the Al–20 %Mg2Si in-situ composite. Additionally, GISS operations were conducted to evaluate the increase in entry points for the inert gas into the melt, utilizing two diffusers separately on a fixed sample. microstructural evaluations revealed that the sample produced at 660 °C, with a flow rate of 6 L min−1 using two graphite diffusers for 20 s, exhibited an average particle size of 32 μm for the primary Mg2Si, a sphericity of 65 %, and a primary Mg2Si particle count of 405 per mm2. These findings represent a significant microstructural improvement compared to the as-cast sample, underscoring the novelty of this work in modifying Mg2Si intermetallic by inert gas blowing. Results from tensile and hardness tests demonstrated that for the optimal sample, hardness increased by 32 %, ultimate tensile strength (UTS) by 18 %, yield strength (Y.S.) by 12 %, elongation (ɛ%) by 39 %, toughness by 66 %, in comparison to the as-cast sample, indicating substantial enhancement in mechanical properties. |
| format | Article |
| id | doaj-art-65df6ecd4d904ffd907b1997b846c7f4 |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-65df6ecd4d904ffd907b1997b846c7f42025-08-20T03:08:18ZengElsevierJournal of Materials Research and Technology2238-78542025-07-01375203521410.1016/j.jmrt.2025.07.122Effect of inert gas blowing on the microstructure and mechanical properties of semi-solid cast Al–20 %Mg2Si compositeMoein G. Shabestari0Ahad Nasimi Asl1Saeed G. Shabestari2School of Metallurgy & Materials Engineering, Iran University of Science and Technology (IUST), Narmak, 16846-13114, Tehran, IranSchool of Metallurgy & Materials Engineering, Iran University of Science and Technology (IUST), Narmak, 16846-13114, Tehran, IranCorresponding author.; School of Metallurgy & Materials Engineering, Iran University of Science and Technology (IUST), Narmak, 16846-13114, Tehran, IranThe morphology and particle size of the primary Mg2Si intermetallic compounds significantly influence the mechanical properties of the in-situ Al–Mg2Si composite. This study investigates, for the first time, the effect of argon inert gas blowing in the semi-solid state or gas induced semi-solid (GISS) at varying durations, flow rates, and temperatures on the microstructure, hardness, and tensile properties of the Al–20 %Mg2Si in-situ composite. Additionally, GISS operations were conducted to evaluate the increase in entry points for the inert gas into the melt, utilizing two diffusers separately on a fixed sample. microstructural evaluations revealed that the sample produced at 660 °C, with a flow rate of 6 L min−1 using two graphite diffusers for 20 s, exhibited an average particle size of 32 μm for the primary Mg2Si, a sphericity of 65 %, and a primary Mg2Si particle count of 405 per mm2. These findings represent a significant microstructural improvement compared to the as-cast sample, underscoring the novelty of this work in modifying Mg2Si intermetallic by inert gas blowing. Results from tensile and hardness tests demonstrated that for the optimal sample, hardness increased by 32 %, ultimate tensile strength (UTS) by 18 %, yield strength (Y.S.) by 12 %, elongation (ɛ%) by 39 %, toughness by 66 %, in comparison to the as-cast sample, indicating substantial enhancement in mechanical properties.http://www.sciencedirect.com/science/article/pii/S2238785425017806Semi-solid processGISSMechanical propertiesAl–20 %Mg2Si compositeMicrostructureInert gas injection method |
| spellingShingle | Moein G. Shabestari Ahad Nasimi Asl Saeed G. Shabestari Effect of inert gas blowing on the microstructure and mechanical properties of semi-solid cast Al–20 %Mg2Si composite Journal of Materials Research and Technology Semi-solid process GISS Mechanical properties Al–20 %Mg2Si composite Microstructure Inert gas injection method |
| title | Effect of inert gas blowing on the microstructure and mechanical properties of semi-solid cast Al–20 %Mg2Si composite |
| title_full | Effect of inert gas blowing on the microstructure and mechanical properties of semi-solid cast Al–20 %Mg2Si composite |
| title_fullStr | Effect of inert gas blowing on the microstructure and mechanical properties of semi-solid cast Al–20 %Mg2Si composite |
| title_full_unstemmed | Effect of inert gas blowing on the microstructure and mechanical properties of semi-solid cast Al–20 %Mg2Si composite |
| title_short | Effect of inert gas blowing on the microstructure and mechanical properties of semi-solid cast Al–20 %Mg2Si composite |
| title_sort | effect of inert gas blowing on the microstructure and mechanical properties of semi solid cast al 20 mg2si composite |
| topic | Semi-solid process GISS Mechanical properties Al–20 %Mg2Si composite Microstructure Inert gas injection method |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425017806 |
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