Abstract A re-rolling method was successfully developed to add more layer of carbon fibers into the composite plate that already contained one layer fibers. The thickness and state of covering-layer were synchronously controlled to achieve a subtle equilibrium between the solidification and deformation behaviors. It could offer sufficient infiltration effects on the upper fibers and protection effects on the lower fibers at the same time. Due to the ideal micro-structure of both layers fibers, the maximum bending stress value of the composite could reach 139.8 MPa, an improvement of 42 % than the corresponding matrix, and 16 % than the composite with one layer fibers. The distribution characteristics of alloying elements were systematically investigated, and the elements with the tendency to aggregating in the last solidification part that proved to be more prone to locate in the fiber region. The mixing enthalpy theory was introduced to explain the distribution of coating elements in the composite.

中文翻译：

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碳纤维增强铝基复合材料再轧工艺及合金元素分布

摘要 成功地开发了一种再轧制方法，在已经含有一层纤维的复合板中加入更多层碳纤维。同步控制覆盖层的厚度和状态，以实现凝固和变形行为之间的微妙平衡。它可以同时对上层纤维提供足够的渗透作用，同时对下层纤维提供保护作用。由于两层纤维的理想微观结构，复合材料的最大弯曲应力值可达139.8 MPa，比相应的基体提高42%，比含一层纤维的复合材料提高16%。系统研究了合金元素的分布特征，以及在最后凝固部分具有聚集趋势的元素被证明更容易位于纤维区域。引入混合焓理论来解释复合材料中涂层元素的分布。