| 原位TiC颗粒细化喷射沉积7075铝合金组织的机理 |
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| 引用本文： | 刘慧敏,郝斌,杨滨,张济山. 原位TiC颗粒细化喷射沉积7075铝合金组织的机理[J]. 北京科技大学学报, 2006, 28(4): 369-372 |
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| 作者姓名： | 刘慧敏 郝斌 杨滨 张济山 |
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| 作者单位： | 1. 内蒙古工业大学材料科学与工程学院,呼和浩特,010051;北京科技大学新金属材料国家重点实验室,北京,100083
2. 北京科技大学新金属材料国家重点实验室,北京,100083 |
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| 摘 要： | 采用原位反应喷射沉积法制备TiCP/7075(TiCP体积分数为2.91%)铝合金,观察其微观组织. 应用Image Tool软件及平均截线法统计平均晶粒尺寸,并与喷射沉积7075铝合金进行对比. 发现前者的晶粒尺寸比后者减小50%左右,表明原位TiC颗粒对喷射沉积7075铝合金组织具有显著的细化作用. 从形核的属性、速度以及过程的晶体学分析对其细化机理进行了解释.
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| 关 键 词： | 7075铝合金 原位TiC颗粒 喷射沉积 微观组织 颗粒细化 喷射沉积 合金组织 细化机理 Al alloys spray microstructure TiC particles mechanism 解释 晶体学分析 过程 速度 属性 形核 细化作用 晶粒尺寸比 发现 平均晶粒尺寸 统计 |
| 收稿时间： | 2005-05-04 |
| 修稿时间： | 2005-06-28 |
Refinement mechanism of in-situ TiC particles on the microstructure of spray formed 7075 Al alloys |
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| LIU Huimin,HAO Bin,YANG Bin,ZHANG Jishan. Refinement mechanism of in-situ TiC particles on the microstructure of spray formed 7075 Al alloys[J]. Journal of University of Science and Technology Beijing, 2006, 28(4): 369-372 |
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| Authors: | LIU Huimin HAO Bin YANG Bin ZHANG Jishan |
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| Affiliation: | 1 School of Materials Science and Engineering, Inner Mongolia University of Technology, Huhehaote 010062, China; 2State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | The microstructure of an in-situ reactive spray formed TiC_P/7075 (TiC_P=2.91% in volume fraction) Al alloy was observed using SEM. The grain sizes were measured by Image Tool software and a mean linear intercept method and compared with that of spray formed 7075 Al alloys. The result showed that the grain size of the former alloy was decreased 50% compared to the later. It is indicated that in-situ TiC particles play a significant role on refining the microstructure of spray formed 7075 Al alloys. The refinement mechanism was interpreted from nucleation attribute, nucleation velocity and crystallographic analysis in nucleation process. |
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| Keywords: | 7075 Al alloy in-situ TiC particles spray forming microstructure |
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