| Sr对AZ31B镁合金微观组织和腐蚀性能的影响 |
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| 引用本文： | 刘军威,彭晓东,刘明朴,马宏,魏群义.Sr对AZ31B镁合金微观组织和腐蚀性能的影响[J].腐蚀与防护,2011(5). |
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| 作者姓名： | 刘军威 彭晓东 刘明朴 马宏 魏群义 |
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| 作者单位： | 重庆大学材料科学与工程学院;重庆大学国家镁合金材料工程技术研究中心; |
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| 基金项目： | 国家973项目(No.2007CB613702) |
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| 摘 要： | 研究了Sr对AZ31B镁合金显微组织和腐蚀性能的影响。当AZ31B中加入的Sr含量大于0.3%时,合金组织中β相(Mg_(17)Al_(12))减少,分布更加弥散和均匀,并且在晶界上形成了断续网状分布的Al_4Sr相,合金组织明显细化。当AZ31B中加入的Sr含量达到0.9%时腐蚀速率下降为AZ31B的50%。但Sr含量达到1.2%时,晶界处出现共晶组织呈断续网状分布,合金晶粒再度增大。
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| 关 键 词： | 镁合金 锶 显微组织 腐蚀 极化曲线 |
Effect of Sr on Microstructure and Corrosion Resistance of AZ31B Magnesium Alloy |
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| LIU Jun-wei,PENG Xiao-dong,LIU Ming-pu,MA Hong,WEI Qun-yi.Effect of Sr on Microstructure and Corrosion Resistance of AZ31B Magnesium Alloy[J].Corrosion & Protection,2011(5). |
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| Authors: | LIU Jun-wei PENG Xiao-dong LIU Ming-pu MA Hong WEI Qun-yi |
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| Affiliation: | LIU Jun-wei~1,PENG Xiao-dong~(1,2),LIU Ming-pu~1,MA Hong~1,WEI Qun-yi~(1,2) (1.2.Chongqing University,Chongqing 400044,China) |
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| Abstract: | The effect of strontium on microstructurc and corrosion resistance of magnesium alloy was studied.When the addition of Sr was more than 0.3%.the amount of Mg_(17)Al_(12)phase in the alloy decreased,and distribution became more uniform,reticular Al_4Sr at grain boundaries formed and microstructure of the alloy was also refined obviously. The corrosion rate of AZ31 alloy with an addition of 0.9%Sr decreased to 50%.This was mainly caused by the formation of reticular Al_4Sr phase,which acted as an effective ba... |
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| Keywords: | magnesium alloy strontium microstructure corrosion polarization curve |
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