Ultrasonic assisted stir squeeze casting of AA5456/Al2O3–SiC-Gr-MoS2 hybrid nanocomposites: Microstructure and strengthening analysis
This study explores the development of aluminum metal matrix hybrid nanocomposites (AMMHNCs) using AA5456 alloy reinforced with 2 wt % of SiC, Al2O3, graphite (Gr), and MoS2 nanoparticles (NPs) through ultrasonic-assisted bottom pouring stir-squeeze casting. The AMMHNCs were characterized using X-ra...
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2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424029752 |
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| author | B.N. Akash Deep S. Rajanna K.N. Krishnamurthy G.C. Manjunath Patel T. Ganesha G.V. Gnanedra Reddy Mudassir Hasan Emanoil Linul |
| author_facet | B.N. Akash Deep S. Rajanna K.N. Krishnamurthy G.C. Manjunath Patel T. Ganesha G.V. Gnanedra Reddy Mudassir Hasan Emanoil Linul |
| author_sort | B.N. Akash Deep |
| collection | DOAJ |
| description | This study explores the development of aluminum metal matrix hybrid nanocomposites (AMMHNCs) using AA5456 alloy reinforced with 2 wt % of SiC, Al2O3, graphite (Gr), and MoS2 nanoparticles (NPs) through ultrasonic-assisted bottom pouring stir-squeeze casting. The AMMHNCs were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray analysis (EDX). XRD confirmed successful NPs incorporation, SEM showed a refined microstructure, and EDX demonstrated a uniform distribution of reinforcements. The study shows that adding NPs with higher intrinsic densities, like Al2O3 and MoS2, increases composite densities. The ASMHNC (AA5456 + Al2O3 + SiC + MoS2) sample exhibited the highest density. Conversely, incorporating lighter SiC and graphite NPs resulted in lower-density composites, as exemplified by the ASGHNC (AA5456 + Al2O3 + SiC + Gr) sample having the lowest density. Adding SiC and MoS2 NPs significantly increases the composites' hardness due to effective grain boundary strengthening, with the ASMHNC sample achieving a maximum hardness of 158.64 HV. The yield strength (YS) and ultimate tensile strength (UTS) of ASMHNC improved significantly by 51.02% and 35.32%, respectively, compared to the AA5456 alloy. The ASMHNC samples exhibited the highest compressive strength of 383.46 MPa, while the AA5456 alloy had the lowest (328.63 MPa). However, adding Gr-NPs slightly reduces YS and UTS and decreases elongation percentage, indicating a potential compromise in ductility and toughness. Fractography analysis identifies various fracture modes, including ductile, brittle, and fatigue, along with their distinct surface features, providing insights into the fracture mechanisms of the AMMHNCs. The research also examines the primary strengthening mechanisms contributing to the increase in YS, including thermal mismatch, the Orowan effect, the Hall-Petch effect, and load bearing. Five prediction models were established to estimate the YS of the developed hybrid nanocomposites. The Quadratic Summation and Arithmetic Summation methods effectively predict the YS of the prepared AMMHNCs, with predictions closely aligning with experimental results. |
| format | Article |
| id | doaj-art-78534dd4b1d248558d8e60781b07f735 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-78534dd4b1d248558d8e60781b07f7352025-01-19T06:25:42ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013416111635Ultrasonic assisted stir squeeze casting of AA5456/Al2O3–SiC-Gr-MoS2 hybrid nanocomposites: Microstructure and strengthening analysisB.N. Akash Deep0S. Rajanna1K.N. Krishnamurthy2G.C. Manjunath Patel3T. Ganesha4G.V. Gnanedra Reddy5Mudassir Hasan6Emanoil Linul7Department of Mechanical Engineering, K.S. School of Engineering and Management, Bengaluru, 560109, Karnataka, IndiaDepartment of Mechanical Engineering, Government Engineering College, Mosalehosahalli, 573212, Karnataka, IndiaDepartment of Mechanical Engineering, VTU, Centre for Post Graduate Studies, Mysuru, 570029, Karnataka, India; Corresponding author.Department of Mechanical Engineering, PES Institute of Technology and Management, Shivamogga, Visvesvaraya Technological University, Belagavi, 590018, Karnataka, IndiaDepartment of Mechanical Engineering, VTU, Centre for Post Graduate Studies, Mysuru, 570029, Karnataka, IndiaDepartment of Mechanical Engineering, S.J.C. Institute of Technology, Chickballapur, 562101, Karnataka, IndiaDepartment of Chemical Engineering King Khalid University, Abha, Saudi ArabiaDepartment of Mechanics and Strength of Materials, Politehnica University Timisoara, 1 Mihai Viteazu Avenue, 300 222, Timisoara, Romania; Corresponding author.This study explores the development of aluminum metal matrix hybrid nanocomposites (AMMHNCs) using AA5456 alloy reinforced with 2 wt % of SiC, Al2O3, graphite (Gr), and MoS2 nanoparticles (NPs) through ultrasonic-assisted bottom pouring stir-squeeze casting. The AMMHNCs were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray analysis (EDX). XRD confirmed successful NPs incorporation, SEM showed a refined microstructure, and EDX demonstrated a uniform distribution of reinforcements. The study shows that adding NPs with higher intrinsic densities, like Al2O3 and MoS2, increases composite densities. The ASMHNC (AA5456 + Al2O3 + SiC + MoS2) sample exhibited the highest density. Conversely, incorporating lighter SiC and graphite NPs resulted in lower-density composites, as exemplified by the ASGHNC (AA5456 + Al2O3 + SiC + Gr) sample having the lowest density. Adding SiC and MoS2 NPs significantly increases the composites' hardness due to effective grain boundary strengthening, with the ASMHNC sample achieving a maximum hardness of 158.64 HV. The yield strength (YS) and ultimate tensile strength (UTS) of ASMHNC improved significantly by 51.02% and 35.32%, respectively, compared to the AA5456 alloy. The ASMHNC samples exhibited the highest compressive strength of 383.46 MPa, while the AA5456 alloy had the lowest (328.63 MPa). However, adding Gr-NPs slightly reduces YS and UTS and decreases elongation percentage, indicating a potential compromise in ductility and toughness. Fractography analysis identifies various fracture modes, including ductile, brittle, and fatigue, along with their distinct surface features, providing insights into the fracture mechanisms of the AMMHNCs. The research also examines the primary strengthening mechanisms contributing to the increase in YS, including thermal mismatch, the Orowan effect, the Hall-Petch effect, and load bearing. Five prediction models were established to estimate the YS of the developed hybrid nanocomposites. The Quadratic Summation and Arithmetic Summation methods effectively predict the YS of the prepared AMMHNCs, with predictions closely aligning with experimental results.http://www.sciencedirect.com/science/article/pii/S2238785424029752Hybrid metal matrix nanocompositesUltrasonic assisted stir-squeeze castingSiCAl2O3GrMoS2 |
| spellingShingle | B.N. Akash Deep S. Rajanna K.N. Krishnamurthy G.C. Manjunath Patel T. Ganesha G.V. Gnanedra Reddy Mudassir Hasan Emanoil Linul Ultrasonic assisted stir squeeze casting of AA5456/Al2O3–SiC-Gr-MoS2 hybrid nanocomposites: Microstructure and strengthening analysis Journal of Materials Research and Technology Hybrid metal matrix nanocomposites Ultrasonic assisted stir-squeeze casting SiC Al2O3 Gr MoS2 |
| title | Ultrasonic assisted stir squeeze casting of AA5456/Al2O3–SiC-Gr-MoS2 hybrid nanocomposites: Microstructure and strengthening analysis |
| title_full | Ultrasonic assisted stir squeeze casting of AA5456/Al2O3–SiC-Gr-MoS2 hybrid nanocomposites: Microstructure and strengthening analysis |
| title_fullStr | Ultrasonic assisted stir squeeze casting of AA5456/Al2O3–SiC-Gr-MoS2 hybrid nanocomposites: Microstructure and strengthening analysis |
| title_full_unstemmed | Ultrasonic assisted stir squeeze casting of AA5456/Al2O3–SiC-Gr-MoS2 hybrid nanocomposites: Microstructure and strengthening analysis |
| title_short | Ultrasonic assisted stir squeeze casting of AA5456/Al2O3–SiC-Gr-MoS2 hybrid nanocomposites: Microstructure and strengthening analysis |
| title_sort | ultrasonic assisted stir squeeze casting of aa5456 al2o3 sic gr mos2 hybrid nanocomposites microstructure and strengthening analysis |
| topic | Hybrid metal matrix nanocomposites Ultrasonic assisted stir-squeeze casting SiC Al2O3 Gr MoS2 |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424029752 |
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