Superplasticity and grain boundary sliding in rolled AZ91 magnesium alloy at high strain rates
The superplastic deformation characteristics and microstructure evolution of the rolled AZ91 magnesium alloys at temperatures ranging from 623 to 698 K (0.67–0.76 Tm) and at the high strain rates ranging from 10−3 to 1 s−1 were investigated with the methods of OM, SEM and TEM. An excellent superplas...
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| Veröffentlicht in: | Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2003-11, Vol.360 (1-2), p.107-115 |
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| container_title | Materials science & engineering. A, Structural materials : properties, microstructure and processing |
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| creator | Wei, Y.H. Wang, Q.D. Zhu, Y.P. Zhou, H.T. Ding, W.J. Chino, Y. Mabuchi, M. |
| description | The superplastic deformation characteristics and microstructure evolution of the rolled AZ91 magnesium alloys at temperatures ranging from 623 to 698 K (0.67–0.76 Tm) and at the high strain rates ranging from 10−3 to 1 s−1 were investigated with the methods of OM, SEM and TEM. An excellent superplasticity with the maximum elongation to failure of 455% was obtained at 623 K and the strain rate of 10−3 s−1 in the rolled AZ91 magnesium alloys and its strain rate sensitivity m is high, up to 0.64. The dominant deformation mechanism in high strain rate superplasticity is still grain boundary sliding (GBS), which was studied systematically in this study. The dislocation creep controlled by grain boundary diffusion was considered the main accommodation mechanism, which was observed in this study. |
| doi_str_mv | 10.1016/S0921-5093(03)00407-6 |
| format | Article |
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An excellent superplasticity with the maximum elongation to failure of 455% was obtained at 623 K and the strain rate of 10−3 s−1 in the rolled AZ91 magnesium alloys and its strain rate sensitivity m is high, up to 0.64. The dominant deformation mechanism in high strain rate superplasticity is still grain boundary sliding (GBS), which was studied systematically in this study. The dislocation creep controlled by grain boundary diffusion was considered the main accommodation mechanism, which was observed in this study.</description><identifier>ISSN: 0921-5093</identifier><identifier>EISSN: 1873-4936</identifier><identifier>DOI: 10.1016/S0921-5093(03)00407-6</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Applied sciences ; AZ91 magnesium alloy ; Elasticity. Plasticity ; Exact sciences and technology ; GBS ; High strain rates ; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology ; Metals. 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A, Structural materials : properties, microstructure and processing</title><description>The superplastic deformation characteristics and microstructure evolution of the rolled AZ91 magnesium alloys at temperatures ranging from 623 to 698 K (0.67–0.76 Tm) and at the high strain rates ranging from 10−3 to 1 s−1 were investigated with the methods of OM, SEM and TEM. An excellent superplasticity with the maximum elongation to failure of 455% was obtained at 623 K and the strain rate of 10−3 s−1 in the rolled AZ91 magnesium alloys and its strain rate sensitivity m is high, up to 0.64. The dominant deformation mechanism in high strain rate superplasticity is still grain boundary sliding (GBS), which was studied systematically in this study. The dislocation creep controlled by grain boundary diffusion was considered the main accommodation mechanism, which was observed in this study.</description><subject>Applied sciences</subject><subject>AZ91 magnesium alloy</subject><subject>Elasticity. Plasticity</subject><subject>Exact sciences and technology</subject><subject>GBS</subject><subject>High strain rates</subject><subject>Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology</subject><subject>Metals. 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Plasticity</topic><topic>Exact sciences and technology</topic><topic>GBS</topic><topic>High strain rates</topic><topic>Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology</topic><topic>Metals. Metallurgy</topic><topic>Superplasticity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wei, Y.H.</creatorcontrib><creatorcontrib>Wang, Q.D.</creatorcontrib><creatorcontrib>Zhu, Y.P.</creatorcontrib><creatorcontrib>Zhou, H.T.</creatorcontrib><creatorcontrib>Ding, W.J.</creatorcontrib><creatorcontrib>Chino, Y.</creatorcontrib><creatorcontrib>Mabuchi, M.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Materials science & engineering. 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A, Structural materials : properties, microstructure and processing</jtitle><date>2003-11-15</date><risdate>2003</risdate><volume>360</volume><issue>1-2</issue><spage>107</spage><epage>115</epage><pages>107-115</pages><issn>0921-5093</issn><eissn>1873-4936</eissn><abstract>The superplastic deformation characteristics and microstructure evolution of the rolled AZ91 magnesium alloys at temperatures ranging from 623 to 698 K (0.67–0.76 Tm) and at the high strain rates ranging from 10−3 to 1 s−1 were investigated with the methods of OM, SEM and TEM. An excellent superplasticity with the maximum elongation to failure of 455% was obtained at 623 K and the strain rate of 10−3 s−1 in the rolled AZ91 magnesium alloys and its strain rate sensitivity m is high, up to 0.64. The dominant deformation mechanism in high strain rate superplasticity is still grain boundary sliding (GBS), which was studied systematically in this study. The dislocation creep controlled by grain boundary diffusion was considered the main accommodation mechanism, which was observed in this study.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/S0921-5093(03)00407-6</doi><tpages>9</tpages></addata></record> |
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| ispartof | Materials science & engineering. A, Structural materials : properties, microstructure and processing, 2003-11, Vol.360 (1-2), p.107-115 |
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| source | Access via ScienceDirect (Elsevier) |
| subjects | Applied sciences AZ91 magnesium alloy Elasticity. Plasticity Exact sciences and technology GBS High strain rates Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metals. Metallurgy Superplasticity |
| title | Superplasticity and grain boundary sliding in rolled AZ91 magnesium alloy at high strain rates |
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