High temperature tensile response of nano-Al2O3 reinforced AZ31 nanocomposites
Nano-Al2O3 reinforcement's capability to simultaneously enhance the room temperature (25°C) strength and ductility of magnesium alloys has effectively been exploited in ingot metallurgy processed AZ31/1.5Al2O3 nanocomposite in this study. Tensile characterization revealed that at high temperatu...
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| Veröffentlicht in: | Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2012-12, Vol.558, p.278-284 |
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| container_title | Materials science & engineering. A, Structural materials : properties, microstructure and processing |
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| creator | Hassan, S.F. Paramsothy, M. Patel, F. Gupta, M. |
| description | Nano-Al2O3 reinforcement's capability to simultaneously enhance the room temperature (25°C) strength and ductility of magnesium alloys has effectively been exploited in ingot metallurgy processed AZ31/1.5Al2O3 nanocomposite in this study. Tensile characterization revealed that at high temperature (150–250°C), instead of strengthening, the thermally stable nano-Al2O3 reinforcement ironically exacerbated the softening of AZ31 alloy. However, an incredible increment in AZ31 alloy (with grain size of ∼2.3μm) ductility (up to 184%) has been achieved in the nanocomposite with increasing temperature due to the incorporation of nano-Al2O3 as reinforcement. Microstructural characterization of the nanocomposite revealed that the dynamic recrystallization process has induced a complete recrystallization in AZ31 alloy matrix at a relatively much lower temperature (150°C) with tremendous grain growth near the fracture surface at higher temperature (250°C). Fractography of the nanocomposite revealed that the room temperature mixed ductile mode fracture behavior of AZ31 alloy transformed to a complete ductile mode at high temperature due to the presence of nano-Al2O3 particulates. |
| doi_str_mv | 10.1016/j.msea.2012.08.002 |
| format | Article |
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Tensile characterization revealed that at high temperature (150–250°C), instead of strengthening, the thermally stable nano-Al2O3 reinforcement ironically exacerbated the softening of AZ31 alloy. However, an incredible increment in AZ31 alloy (with grain size of ∼2.3μm) ductility (up to 184%) has been achieved in the nanocomposite with increasing temperature due to the incorporation of nano-Al2O3 as reinforcement. Microstructural characterization of the nanocomposite revealed that the dynamic recrystallization process has induced a complete recrystallization in AZ31 alloy matrix at a relatively much lower temperature (150°C) with tremendous grain growth near the fracture surface at higher temperature (250°C). Fractography of the nanocomposite revealed that the room temperature mixed ductile mode fracture behavior of AZ31 alloy transformed to a complete ductile mode at high temperature due to the presence of nano-Al2O3 particulates.</description><identifier>ISSN: 0921-5093</identifier><identifier>EISSN: 1873-4936</identifier><identifier>DOI: 10.1016/j.msea.2012.08.002</identifier><language>eng</language><publisher>Kidlington: Elsevier B.V</publisher><subject>AZ31 ; Condensed matter: structure, mechanical and thermal properties ; Cross-disciplinary physics: materials science; rheology ; Ductile fracture ; Ductility ; Exact sciences and technology ; High-temperature strength ; Magnesium base alloys ; Materials science ; Mechanical and acoustical properties of condensed matter ; Mechanical properties of nanoscale materials ; Microstructure ; Nano-Al2O3 ; Nanocomposite ; Nanocomposites ; Nanocrystalline materials ; Nanomaterials ; Nanoscale materials and structures: fabrication and characterization ; Nanostructure ; Physics ; Recrystallization ; Reinforcement ; Softening</subject><ispartof>Materials science & engineering. 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A, Structural materials : properties, microstructure and processing</title><description>Nano-Al2O3 reinforcement's capability to simultaneously enhance the room temperature (25°C) strength and ductility of magnesium alloys has effectively been exploited in ingot metallurgy processed AZ31/1.5Al2O3 nanocomposite in this study. Tensile characterization revealed that at high temperature (150–250°C), instead of strengthening, the thermally stable nano-Al2O3 reinforcement ironically exacerbated the softening of AZ31 alloy. However, an incredible increment in AZ31 alloy (with grain size of ∼2.3μm) ductility (up to 184%) has been achieved in the nanocomposite with increasing temperature due to the incorporation of nano-Al2O3 as reinforcement. Microstructural characterization of the nanocomposite revealed that the dynamic recrystallization process has induced a complete recrystallization in AZ31 alloy matrix at a relatively much lower temperature (150°C) with tremendous grain growth near the fracture surface at higher temperature (250°C). 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A, Structural materials : properties, microstructure and processing</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hassan, S.F.</au><au>Paramsothy, M.</au><au>Patel, F.</au><au>Gupta, M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>High temperature tensile response of nano-Al2O3 reinforced AZ31 nanocomposites</atitle><jtitle>Materials science & engineering. A, Structural materials : properties, microstructure and processing</jtitle><date>2012-12-15</date><risdate>2012</risdate><volume>558</volume><spage>278</spage><epage>284</epage><pages>278-284</pages><issn>0921-5093</issn><eissn>1873-4936</eissn><abstract>Nano-Al2O3 reinforcement's capability to simultaneously enhance the room temperature (25°C) strength and ductility of magnesium alloys has effectively been exploited in ingot metallurgy processed AZ31/1.5Al2O3 nanocomposite in this study. Tensile characterization revealed that at high temperature (150–250°C), instead of strengthening, the thermally stable nano-Al2O3 reinforcement ironically exacerbated the softening of AZ31 alloy. However, an incredible increment in AZ31 alloy (with grain size of ∼2.3μm) ductility (up to 184%) has been achieved in the nanocomposite with increasing temperature due to the incorporation of nano-Al2O3 as reinforcement. Microstructural characterization of the nanocomposite revealed that the dynamic recrystallization process has induced a complete recrystallization in AZ31 alloy matrix at a relatively much lower temperature (150°C) with tremendous grain growth near the fracture surface at higher temperature (250°C). Fractography of the nanocomposite revealed that the room temperature mixed ductile mode fracture behavior of AZ31 alloy transformed to a complete ductile mode at high temperature due to the presence of nano-Al2O3 particulates.</abstract><cop>Kidlington</cop><pub>Elsevier B.V</pub><doi>10.1016/j.msea.2012.08.002</doi><tpages>7</tpages></addata></record> |
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| identifier | ISSN: 0921-5093 |
| ispartof | Materials science & engineering. A, Structural materials : properties, microstructure and processing, 2012-12, Vol.558, p.278-284 |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | AZ31 Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Ductile fracture Ductility Exact sciences and technology High-temperature strength Magnesium base alloys Materials science Mechanical and acoustical properties of condensed matter Mechanical properties of nanoscale materials Microstructure Nano-Al2O3 Nanocomposite Nanocomposites Nanocrystalline materials Nanomaterials Nanoscale materials and structures: fabrication and characterization Nanostructure Physics Recrystallization Reinforcement Softening |
| title | High temperature tensile response of nano-Al2O3 reinforced AZ31 nanocomposites |
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