| 热变形Ti-15-3合金再结晶晶粒的分形分析 |
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| 引用本文： | 张青,李萍,薛克敏.热变形Ti-15-3合金再结晶晶粒的分形分析[J].中国有色金属学报,2007,17(7):1149-1154. |
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| 作者姓名： | 张青 李萍 薛克敏 |
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| 作者单位： | 合肥工业大学,材料科学与工程学院,合肥,230009 |
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| 摘 要： | 根据分形几何学理论,分析热变形Ti-15-3合金固溶处理后的再结晶组织。分别采用小岛法和盒维数法计算出晶粒的分形维数,并探讨分形维数、晶粒尺寸与变形条件之间的关系。结果表明：再结晶晶粒形态具有自相似性,表现出典型的分形特征;且随着变形程度、变形速率的增加和变形温度的降低,再结晶晶粒尺寸减小,分维增大。分形理论的应用为非规则热变形组织的定量研究提供了一种新的方法。
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| 关 键 词： | Ti-15-3合金 热变形 再结晶组织 分形 |
| 文章编号： | 1004-0609（2007）07-1149-06 |
| 收稿时间： | 2006-08-30 |
| 修稿时间： | 2007-05-20 |
Fractal analysis of recrystallized grains of Ti-15-3 alloy after hot deformation |
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| ZHANG Qing,LI Ping,XUE Ke-min.Fractal analysis of recrystallized grains of Ti-15-3 alloy after hot deformation[J].The Chinese Journal of Nonferrous Metals,2007,17(7):1149-1154. |
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| Authors: | ZHANG Qing LI Ping XUE Ke-min |
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| Affiliation: | School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China |
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| Abstract: | The fractal theory was applied to analyze the recrystallized microstructure of Ti-15-3 alloy after hot deformation and solution treatment. Slit Island Method and Box Counting Method were used to calculate the fractal dimension of grains. The influence of processing parameters on fractal dimension and grain size was studied. The results show that the shapes of recrystallized grain boundaries are self-similar. The fractal dimension of grain boundaries increases with increasing deformation degree and strain rate whereas decreases with increasing deformation temperature, It might provide a new method for quantified study on irregular hot deformation microstructure. |
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| Keywords: | Ti-15-3 alloy hot deformation recrystallized microstructure fractal |
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