本文研究了不同Cr含量的AlTiFeNiCuCrx多主元高熵合金的微观组织和力学性能特点。结果表明，Cr含量的增加使合金的凝固模式从亚共晶向过共晶凝固转移，铸态组织由一先析出枝晶相和枝晶间的菊花状共晶组织组成。合金仅由简单的面心立方结构(富Cr相)和体心立方结构(贫Cr相)两相组成。Cr含量的增加对合金硬度的提高较小。该合金为室温脆性材料，但在1073K高温时具有很好的塑性变形能力和较高的强度，当xCr=1-1.5左右时，合金具有最优的压缩强度和塑性组合。
The microstructure and mechanical properties of AlTiFeNiCuCrx with different Cr content have been studied. The results show that, with increasing Cr content, the solidification model of the alloys has a hypoeutectic-to-hypereutectic transition. The matrix is composed of primary dendrite phase and chrysanthemum-shaped eutectic structure. The alloys exhibit simple FCC(high Cr content) and BCC(low Cr content) phases. The hardness value does not increase obviously with Cr content. The alloy is brittle in room temperature, but at 1073K has high ductility and higher strength. When xCr=1-1.5, the alloy exhibits the best combination of the compressive strength and the ductility.
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