| 固化球磨纳米晶粉末制备块体超细晶Mg-3Al-Zn合金(英文) |
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| 引用本文： | 房文斌,房娃,孙宏飞. 固化球磨纳米晶粉末制备块体超细晶Mg-3Al-Zn合金(英文)[J]. 中国有色金属学会会刊, 2011, 0(Z2) |
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| 作者姓名： | 房文斌 房娃 孙宏飞 |
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| 作者单位： | 哈尔滨工业大学材料科学与工程学院; |
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| 基金项目： | Project(DCQQ24404018)supported by the Scientific and Technological Project of Heilongjiang Province,China |
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| 摘 要： | 采用粉末冶金技术制备块体超细晶Mg-3Al-Zn合金。首先采用球磨Mg、Al、Zn混合粉末来制备纳米晶粉末,所得的粉末的平均晶粒尺寸为45nm。随后将球磨好的粉末封入铝包套内,分别在室温和633K温度下,在真空烧结炉内进行真空热压。然后将烧结后的样品在423K下挤压以进行进一步的致密化处理。结果表明:致密后的冷压样品的晶粒尺寸为180nm,而热压坯的晶粒尺寸为600nm,冷压样品的屈服强度达464MPa;超细晶镁合金的强化机制主要是细晶强化,这主要是由于HCP结构的材料晶粒尺寸对材料的影响更为明显。固化后冷压样品的最终密度为(1.777±0.006)g/cm3,而热压样品的最终密度为(1.800±0.006)g/cm3。
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| 关 键 词： | Mg-3Al-Zn合金 超细晶 纳米晶粉末 粉末冶金 |
Preparation of bulk ultrafine-grained Mg-3Al-Zn alloys by consolidation of ball milling nanocrystalline powders |
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| FANG Wen-bin,FANG Wa,SUN Hong-fei School of Materials Science , Engineering,Harbin Institute of Technology,Harbin ,China. Preparation of bulk ultrafine-grained Mg-3Al-Zn alloys by consolidation of ball milling nanocrystalline powders[J]. Transactions of Nonferrous Metals Society of China, 2011, 0(Z2) |
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| Authors: | FANG Wen-bin FANG Wa SUN Hong-fei School of Materials Science Engineering Harbin Institute of Technology Harbin China |
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| Affiliation: | FANG Wen-bin,FANG Wa,SUN Hong-fei School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China |
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| Abstract: | Powder metallurgy was used to fabricate a bulk ultrafine grain size (UFG) Mg-3Al-Zn alloys. Nanocrystalline alloy powders with an average grain size of 45 nm were synthesized via ball milling of elemental powders of Mg, Al and Zn. The milled powders canned in Al containers were subjected to cold (at room temperature) or hot press (for 40 min at 633K), respectively, in a vacuum furnace. The sintered samples were extruded at 423 K to further solidify. The results show that the average grain size is 180 nm for... |
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| Keywords: | Mg-3Al-Zn alloys ultrafine grain nanostructured powders powder metallurgy |
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