| Mg-Cu-Ni-Gd非晶合金结构弛豫及力学性能 |
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| 引用本文： | 袁广银,尹健,丁文江. Mg-Cu-Ni-Gd非晶合金结构弛豫及力学性能[J]. 金属学报, 2008, 44(2): 222-226 |
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| 作者姓名： | 袁广银 尹健 丁文江 |
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| 作者单位： | 上海交通大学轻合金精密成型国家工程研究中心,上海,200030;上海交通大学金属基复合材料国家重点实验室,上海,200030;上海交通大学轻合金精密成型国家工程研究中心,上海,200030 |
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| 基金项目： | 国家自然科学基金 , 教育部留学回国人员科研启动基金 |
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| 摘 要： | 采用差示扫描热分析仪(DSC/DTA),X射线衍射(XRD)和透射电镜(TEM)研究了Mg-Cu-Ni-Gd系非晶合金的结构弛豫以及力学性能,分析了Ni元素对Mg基非晶合金的结构弛豫和力学性能的影响.结果表明, Mg65Cu25 Gd10非晶合金在305 K下保温180 s发生结构弛豫后,出现约1-2 nm的中程有序畴.采用Ni元素部分取代Cu元素,可提高合金抗结构弛豫能力和力学性能.
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| 关 键 词： | Mg-Cu-Ni-Gd合金 非晶合金 结构弛豫 力学性能 |
| 文章编号： | 0412-1960（2008）02-0222-05 |
| 收稿时间： | 2007-05-28 |
| 修稿时间： | 2007-10-08 |
Structural-relaxation and mechanical properties of Mg-Cu-Ni-Gd alloys |
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| YUAN Guangyin,YIN Jian,DING Wenjiang. Structural-relaxation and mechanical properties of Mg-Cu-Ni-Gd alloys[J]. Acta Metallurgica Sinica, 2008, 44(2): 222-226 |
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| Authors: | YUAN Guangyin YIN Jian DING Wenjiang |
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| Abstract: | The structural relaxation and glass-forming ability(GFA) of Mg-Cu-Gd-based glassy alloys and the effect of Ni addition on structural relaxation and mechanical properties were studied by thermal analysis, X-ray diffractometry (XRD) and transmission electron microscopy (TEM). The medium-range order(MRO) zones of about 1-2nm size were observed in the Mg65Cu25Gd10 glassy alloy after structural relaxation caused by annealing for 180s at 305K. Partial substitution of Cu by Ni in Mg-Cu-Gd-based alloys not only improved the mechanical properties, but also increased the stability against structural relaxation. |
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| Keywords: | Mg-Cu-Ni-Gd alloy amorphous alloy structural relaxation mechanical property |
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