| 快速凝固工艺对AZ91HP镁合金腐蚀性能的影响 |
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| 引用本文： | 马国峰,蔡静,娄德元,贺春林. 快速凝固工艺对AZ91HP镁合金腐蚀性能的影响[J]. 沈阳大学学报：自然科学版, 2012, 24(5): 26-30 |
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| 作者姓名： | 马国峰 蔡静 娄德元 贺春林 |
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| 作者单位： | 1. 沈阳大学辽宁省先进材料制备技术重点实验室,辽宁沈阳,110044
2. 中国科学院金属研究所沈阳国家联合实验室,辽宁沈阳110006： |
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| 基金项目： | 国家自然科学基金项目（51171118）; 辽宁省自然科学基金项目（20111019）; 沈阳大学博士启动基金项目（20212339） |
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| 摘 要： | 通过铜模铸造制备快速凝固的AZ91HP镁合金.利用失重法及动电位极化曲线研究了常规铸造AZ91HP和快速凝固AZ91HP镁合金样品在NaCl腐蚀介质中的耐腐蚀性能;通过金相显微镜（OM）、扫描电镜（SEM）及X射线衍射（XRD）分析了腐蚀后合金微观组织及相结构.结果表明,快速凝固的AZ91HP镁合金具有更好的耐腐蚀性能.其主要原因是经快速凝固工艺后：①β-Mg17Al12相近似连续地分布于细小的α-Mg晶界上;②合金的元素分布更加均匀;③合金显微缩松减少.
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| 关 键 词： | 快速凝固 AZ91HP合金 腐蚀性能 显微组织 |
Influence of Rapid Solidification on Corrosion Properties of AZ91HP Alloy |
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| MA Guofeng,CAI Jing,LOU Deyuan,HE Chunlin. Influence of Rapid Solidification on Corrosion Properties of AZ91HP Alloy[J]. Journal of Shenyang University, 2012, 24(5): 26-30 |
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| Authors: | MA Guofeng CAI Jing LOU Deyuan HE Chunlin |
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| Affiliation: | 1.Liaoning Provincial Key Laboratory for Advanced Materials Preparation Technology,Shenyang University,Shenyang 110044,China;2.Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China) |
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| Abstract: | Copper-mould casting process was utilized to prepare rapid solidification（RS） alloy samples.The corrosion properties of conventional casting（CC） AZ91HP alloy and rapid solidification（RS） alloy in different NaCl solutions were studied by static weight loss test and polarization curve measurement.Microstructure and phase constituent of magnesium alloys were investigated utilizing optical microscopy（OM）,scanning electronic microscopy（SEM）,X-ray diffractometry（XRD）.The results show that RS alloy had better corrosion resistance.This is attributed to a combination of a more continuous β-Mg17Al12 phase distribution around finer a grains,chemical homogeneity of α-Mg phase,and less porosity. |
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| Keywords: | rapid solidification AZ91HP alloy corrosion property microstructure |
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