| 8090Al—Li合金焊缝金属形核机制 |
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| 引用本文： | 郝传勇,于尔靖,应慧筠,施成根.8090Al—Li合金焊缝金属形核机制[J].金属学报,1996,32(6):647-652. |
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| 作者姓名： | 郝传勇 于尔靖 应慧筠 施成根 |
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| 作者单位： | 中国科学院金属研究所 |
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| 摘 要： | ８０９０Ａｌ—Ｌｉ合金焊缝凝固组织中除了柱状枝晶和等轴枝晶外，还有一种极细小的等轴非枝晶，它主要分布在熔合区边缘，有时也能呈带状出现在焊缝中部．等轴枝晶与柱状枝晶的结晶核心是平衡态四方Ａｌ_３Ｚｒ粒子，而等轴非枝晶的结晶核心是亚稳态立方Ａｌ_３Ｚｒ粒子．
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| 关 键 词： | 焊缝 形核机制 铝锂合金 |
| 收稿时间： | 1996-06-18 |
| 修稿时间： | 1996-06-18 |
NUCLEATION MECHANISM OF 8090 Al-Li ALLOY WELD METAL |
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| HAO Chuanyong,YU Erjing,YING Huiyun,SHI Chenggen.NUCLEATION MECHANISM OF 8090 Al-Li ALLOY WELD METAL[J].Acta Metallurgica Sinica,1996,32(6):647-652. |
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| Authors: | HAO Chuanyong YU Erjing YING Huiyun SHI Chenggen |
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| Affiliation: | HAO Chuanyong,YU Erjing,YING Huiyun,SHI Chenggen (Institute of Metal Research,Chinese Academy of Sciences,Shenyang ) |
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| Abstract: | A kind of very fine equiaxed non- dendrite, besides the equiaxed dendrites and the columnar dendrites, exists in the 8090 aluminum-lithium alloy welds. The equiaxed non-dendrites are mainly distributed at the edge of the fusion zone; occasionally they can appear in the intermediate section of weld in the form of banding. The nuclei of equiaxed dendrites and columnar dendrites are the equilibrium tetragonal Al_3Zr particles, while the nuclei of equiaxed non -dendrite are demonstrated to be metastable cubic Al_3Zr particles. |
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| Keywords: | Al-Li alloy weld nucleation mechanism equiaxed non-dendrite equilibrium tetragonal Al_3Zr metastable cubic Al_3Zr |
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