| Effect of homogenization treatment on microstrucmre and properties of Al-Mg-Mn-Sc-Zr alloy |
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| 作者姓名： | 聂波 尹志民 朱大鹏 彭勇宜 姜锋 黄继武 |
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| 作者单位： | [1]School of Materials Science and Engineering, Central South University, Changsha 410083, China [2]Northeast Light Alloy Co. Ltd., Harbin 150060, China |
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| 基金项目： | Project（2005CB623705-01） supported by the National Key Fundamental Research and Development Program of China; Project（MKPT-2004-16ZD） supported by the National 10th Five-Year Plan Program |
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| 摘 要： | The effect of homogenization on the hardness, tensile properties, electrical conductivity and microstructure of as-cast Al-6Mg-0.4Mn-0.25Sc-0.12Zr alloy was studied. The results show that during homogenization as-cast studied alloy has obviously hardening effect that is similar to aging hardening behavior in traditional Al alloys. The precipitates are mainly Al3（Sc,Zr） and Al6Mn When homogenization temperature increases the hardness peak value is declined and the time corresponding to hardness peak value is shortened. The electrical conductivity of the alloy monotonously increases with increasing homogenization temperature and time. The decomposition of the supersaturated solid solution containing Sc and Zr which is formed during direct chilling casting and the precipitation of Al3（Sc, Zr） cause hardness increasing. The depletion of the matrix solid solubility decreases the ability of electron scattering in the alloy, resulting in the electrical conductivity increased. Tensile property result at hot rolling state shows that the optimal homogenization treatment processing is holding at 300-350℃ for 6-8 h.
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| 关 键 词： | 均质化 Al-Mg-Mn-Sc-Zr合金 镁 锰 沉淀作用 |
| 收稿时间： | 24 December 2006 |
| 修稿时间： | 2006-12-242007-03-27 |
Effect of homogenization treatment on microstructure and properties of Al-Mg-Mn-Sc-Zr alloy |
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| Nie Bo , Yin Zhi-min , Zhu Da-peng , Peng Yong-yi , Jiang Feng and Huang Ji-wu.Effect of homogenization treatment on microstrucmre and properties of Al-Mg-Mn-Sc-Zr alloy[J].Journal of Central South University of Technology,2007,14(4):452-455. |
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| Authors: | Nie Bo Yin Zhi-min Zhu Da-peng Peng Yong-yi Jiang Feng and Huang Ji-wu |
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| Affiliation: | 1. School of Materials Science and Engineering, Central South University, Changsha 410083, China; 2. Northeast Light Alloy Co. Ltd., Harbin 150060, China |
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| Abstract: | The effect of homogenization on the hardness, tensile properties, electrical conductivity and microstructure of as-cast Al-6Mg-0.4Mn-0.25Sc-0.12Zr
alloy was studied. The results show that during homogenization as-cast studied alloy has obviously hardening effect that is
similar to aging hardening behavior in traditional Al alloys. The precipitates are mainly Al3(Sc,Zr) and Al6Mn. When homogenization temperature increases the hardness peak value is declined and the time corresponding to hardness peak
value is shortened. The electrical conductivity of the alloy monotonously increases with increasing homogenization temperature
and time. The decomposition of the supersaturated solid solution containing Sc and Zr which is formed during direct chilling
casting and the precipitation of Al3(Sc, Zr) cause hardness increasing. The depletion of the matrix solid solubility decreases the ability of electron scattering
in the alloy, resulting in the electrical conductivity increased. Tensile property result at hot rolling state shows that
the optimal homogenization treatment processing is holding at 300–350 °C for 6–8 h.
Foundation item: Project(2005CB623705-01) supported by the National Key Fundamental Research and Development Program of China; Project(MKPT-2004-16ZD)
supported by the National 10th Five-Year Plan Program |
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| Keywords: | Sc Zr Al-Mg-Mn alloy homogenization Al3(Sc Zr) precipitation microstructures tensile properties hardness |
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