| Mechanical properties and microstructures of a wrought AZ91 alloy |
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| 作者姓名： | YANYunqi ZHANGTingjie ZHOULian DENGJu |
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| 作者单位： | [1]TitaniumResearchCenter,NorthwestInstituteforNonferrousMetalResearch,Xi＇an710016,China [2]TitaniumResearchCenter,NorthwestInstituteforNonferrousMetalResearch,Xi＇an710016,China |
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| 基金项目： | This project is financially supported by China Postdoctoral Science Foundation (No. 2003033090) |
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| 摘 要： | Effects of hot plastic deformation on microstructures and tensile properties of AZ91 alloy were investigated. Compared with as-T4 microstructures, the as-extruded samples of AZ91 alloy with fine grains exhibit better strength and ductility due to dynamic recrystallization. The succeeded rotation forging also provides freer grains while the strength increases, but the elongation decreases. Simultaneously, wrought AZ91 alloy shows more balance properties than as-T4 condition ones. An interesting elongation of 228.5% is attained in the as-extruded AZ91 alloy in spite of the coarse grains with the size of 85 μm. The two-step method enhances the superplastic property of AZ91 alloy. The microstructure is still keeping the same scale of grains after superplastic testing.
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| 关 键 词： | 机械性能 显微结构 AZ91镁合金 塑性变形 拉伸性能 铸件 |
Mechanical properties and microstructures of a wrought AZ91 alloy |
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| YANYunqi ZHANGTingjie ZHOULian DENGJu.Mechanical properties and microstructures of a wrought AZ91 alloy[J].Rare Metals,2004,23(3):220-225. |
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| Authors: | YAN Yunqi Zhang Tingjie ZHOU Lian Deng Ju |
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| Affiliation: | Titanium Research Center, Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China |
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| Abstract: | Effects of hot plastic deformation on microstructures and tensile properties of AZ91 alloy were investigated. Compared with as-T4 microstructures, the as-extruded samples of AZ91 alloy with fine grains exhibit better strength and ductility due to dynamic recrystallization. The succeeded rotation forging also provides finer grains while the strength in creases, but the elongation decreases. Simultaneously, wrought AZ91 alloy shows more balance properties than as-T4 condition ones. An interesting elongation of 228.5% is attained in the as-extruded AZ91 alloy in spite of the coarse grains with the size of 85 μm. The two-step method enhances the superplastic property of AZ91 alloy. The microstructure is still keep ing the same scale of grains after superplastic testing. |
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| Keywords: | AZ91 alloy wrought mechanical properties microstructures |
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