首页> 外文期刊>International Journal of Thermal Sciences >Double-diffusive convective modes and induced microstructure localisation during solidification of binary alloys
【24h】

Double-diffusive convective modes and induced microstructure localisation during solidification of binary alloys

机译:二元合金凝固过程中的双扩散对流模式和诱导的微观结构局部化

获取原文
获取原文并翻译 | 示例
           

摘要

We analysed the coupling of convection and solid-liquid interface morphology during upward Bridgman solidification of both transparent and metallic alloys in a cylinder. Localised microstructures are observed for typical alloys but not for lead-30 wt% thallium. This difference is quantitatively explained from phase diagrams and from the more general form of constitutional supercooling criterion, extended for non-dilute alloys. Even if the convection induces a lateral concentration gradient, there is not any lateral gradient on the level of morphological instability and there is not any propagation front of morphological instability for lead-30 wt% thallium alloy. In solidification experiments, convection can be generated by either radial thermal gradient or solute axial gradient. The formation and dynamics of double-diffusive convective pattern is analysed during the transient and different thermal radial gradient conditions.
机译:我们分析了圆柱体中透明和金属合金的向上布里奇曼凝固过程中对流和固液界面形态的耦合。对于典型的合金,观察到局部微观结构,但对于重量百分比为30%的lead,则未观察到。从相图和从更普通的构造过冷准则(适用于非稀合金)中定量地解释了这种差异。即使对流引起横向浓度梯度,对于30 wt%的lead合金,在形态不稳定性水平上也没有任何横向梯度,并且在形态不稳定性上没有任何传播前沿。在凝固实验中,对流可以通过径向热梯度或溶质轴向梯度产生。在瞬态和不同的热径向梯度条件下,分析了双扩散对流模式的形成和动力学。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号