| 快速凝固Al-Cr-Zr-Nb合金的显微组织及析出过程 |
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| 引用本文： | 苏勇,陈翌庆,丁厚福,黄新民.快速凝固Al-Cr-Zr-Nb合金的显微组织及析出过程[J].兵器材料科学与工程,2001,24(5):7-9,40. |
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| 作者姓名： | 苏勇 陈翌庆 丁厚福 黄新民 |
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| 作者单位： | 合肥工业大学材料科学与工程学院,安徽,230009 |
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| 基金项目： | 安徽省教育厅自然科学基金;2000j1172; |
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| 摘 要： | 利用透射电镜 (TEM )、能谱分析 (EDS)和X射线衍射 (XRD)技术研究了快速凝固Al-Cr -Zr -Nb合金的显微组织及析出过程。结果表明 :在快速凝固条件下 ,形成等轴晶和胞状晶结构 ,Zr、Cr、Nb元素固溶在过饱和Al基固溶体中。而在随后的 35 0℃× 2h退火处理后 ,有少量Al13Cr2 相和亚稳超点阵Ll2 -Al3Zr相析出 ;经 5 0 0℃×2h退火处理后 ,亚稳Ll2 -Al3Zr相转变为稳定相DO2 3 -Al3Zr,并有大量Al13Cr2 相析出。Al基点阵参数的变化与上述时效过程相一致
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| 关 键 词： | 快速凝固 Al-Cr-Zr-Nb合金 显微组织 析出过程 |
| 文章编号： | 1004-244X(2001)05-0007-03 |
Microstructure and precipitation process of rapidly solidified Al - Cr- Zr- Nb alloy |
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| SU Yong,CHEN Yiqing,DING Houfu,HUAN XinminCorrespondent:SU Yong,Hefei University of Technology,Hefei ,China.Microstructure and precipitation process of rapidly solidified Al - Cr- Zr- Nb alloy[J].Ordnance Material Science and Engineering,2001,24(5):7-9,40. |
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| Authors: | SU Yong CHEN Yiqing DING Houfu HUAN XinminCorrespondent:SU Yong Hefei University of Technology Hefei China |
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| Affiliation: | SU Yong,CHEN Yiqing,DING Houfu,HUAN XinminCorrespondent:SU Yong,Hefei University of Technology,Hefei 230009,China |
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| Abstract: | The microstructure and precipitation process of the rapidly solidified Al-Cr-Zr-Nb alloy have been investigated using TEM,EDS,XRD.The results indicate that,the equiaxed and cellular crystal structures were formed under rapid solidification,and Zr,Cr and Nb were retained in Al-matrix supersaturated solid solution;during subsequent 350℃×2h heat treatment,a small amount of fine particles of Al 13 Cr 2 phase and metastable Ll 2-Al 3Zr phase precipitated;during 500℃×2h annealing treatment,the metastable Ll 2-Al 3Zr phase transferred into stable DO 23 -Al 3Zr phase,and a great quantity of Al 13 Cr 2 phase particles precipitated;the change of Al-matrix lattice parameters were consistent with the above-mentioned aging process. |
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| Keywords: | rapid solidification Al-Cr-Zr-Nb alloy microstructure precipitation |
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