分析了偏晶合金薄带垂直连续凝固过程,发展了描述该条件下偏晶合金凝固组织演变的数学模型.将计算的温度场和浓度场与凝固组织演变的控制方程相耦合.模拟了Al 5Pb(质量分数.%)合金的凝固过程.结果表明.在固/液界面前存在一过冷区.弥散相液滴在此区间内形核.这些液滴在移向凝固界面的过程中进行扩散长大.随着凝固速度的提高.形核率升高,弥散相液滴的数量密度增大.平均半径减小.
参考文献
| [1] | Zhao J Z, Ratke L. Z Metallkd, 1998; 89:241 |
| [2] | Zhao J. Z, Ratke L. Scr Mater, 1998; 39:181 |
| [3] | Liu Y, Guo J J, Su Y Q, Ding H S, Jia J. Trans Nonferrous Met Soc Chin, 2001; 11:84 |
| [4] | Guo J J, Liu Y, Jia J, Su Y Q, Ding H S, Zhao J Z, Xue X. Scr Mater, 2001; 45:1197 |
| [5] | Prinz B, Romero A. In: Ratke L ed, Immiscible Liquid Metals and Organics, Germany: DGMInformationsgesellschaft, 1993:281 |
| [6] | Eckstein H J. Technologie der Warmebehandlung yon Stahl. Leibzig: VEB Deutscher Verlag fur Grundstoffindustrie, 1976:1 |
| [7] | Patankar S V. Numerical Heat Transfer and Fluid Flow,New York: McGraw-Hill, 1980:1 |
| [8] | Sommer F. Z Metallkd, 1996; 87:865 |
| [9] | Yu Sun-Keun, Sommer F. Z Metallkd, 1996; 87:574 |
| [10] | Eustathopoulos N, Chatain D, Vahlas C. Scr Metall, 1984;18:1 |
| [11] | Falk F. In: Ratke L ed, Immiscible Liquid Metals and Organics. Germany: DGM-Informationsgesellschaft, 1993:93 |
| [12] | Falk F, Langbein D, Heide W, In: Ratke L ed, Immiscible Liquid Metals and Organics, .Germany: DGMInformationsgesellschaft, 1993:111 |
| [13] | Prinz B, Romero A, Ratke L. J Mater Sci, 1995; 30:4715 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%