Zn对铸态Mg—Mn合金力学性能和腐蚀性能的影响
Effect of Zn on mechanical properties and corrosion properties of as-cast Mg-Mn alloy
查看参考文献17篇
文摘
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研究Zn对Mg-Mn合金微观组织、力学性能和在Hank’s溶液中腐蚀性能的影响。结果表明:Zn可以明显细化Mg—Mn合金的铸态组织,当合金中Zn含量(质量分数)为3%时,合金的晶粒尺寸由700-900μm减小到50-80μm。合金的力学性能也随Zn含量的增加而显著提高;Zn含量为3%时,拉伸强度提高128.8MPa,屈服强度提高42.6MPa,伸长率提高1倍多。在Mg-Mn合金中加入1%-2%的Zn,能够增强Mg-Mn合金钝化膜的稳定性,使Mg-Mn合金腐蚀速度显著降低。但是,当Zn含量增至3%时,钝化膜变得不稳定,腐蚀速度增加,耐蚀性能降低。 |
其他语种文摘
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The effect of Zn on the microstructure, mechanical properties and corrosion properties in Hank's solute on of as-cast Mg-Mn alloy was studied. The results indicate that the addition of Zn element can significantly refine the grain size of cast Mg-Mn alloy. When Zn content is increased up to 3% (mass fraction), the grain size of the cast alloy decreases from 700-900 gm to 50-80 Ixm. Meanwhile, the mechanical properties of the alloy also increase with increasing Zn content. When Zn content is 3%, the ultimate tensile strength and the yield strength are increased by 128.8 and 42.6 MPa, respectively, while the elongation is increased twice. Addition of Zn element to Mg-Mn alloy can stabilize the passivation film, which mainly contributes to the low corrosion rate of Mn-Mn-Zn alloy. However, when the Zn content is over 3%, the passivation film becomes unstable, which results in a relatively high corrosion rate. |
来源
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中国有色金属学报
,2008,18(3):388-393 【核心库】
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关键词
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镁合金
;
锌
;
微观组织
;
力学性能
;
腐蚀
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地址
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1.
哈尔滨工业大学材料科学与工程学院, 黑龙江, 哈尔滨, 150001
2.
中国科学院金属研究所, 辽宁, 沈阳, 110016
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1004-0609 |
学科
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金属学与金属工艺 |
基金
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中国科学院“百人计划”项目
;
沈阳市创新平台建设计划资助项目
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文献收藏号
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CSCD:3257994
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