Magnesium/hydroxyapatite composites were produced by conventional extrusion and their mechanical behavior studied under uniaxial compression at room temperature. The results evidence the capability of the HA for strengthening the Mg material, lowering its microstructural anisotropy and inhibiting deformation twinning. They also reveal that the ECAP processing is effective for improving the grain structure and reducing the crystallographic texture of these composites, giving rise to a significant enhancement of their yield strength and microhardness although the ultimate compressive stress worsens. The analysis of the strain hardening rate of the flow curves demonstrates that the HA addition and the ECAP processing are also effective in inhibiting non-basal dislocation slip.

译文

镁/羟基磷灰石复合材料是通过常规挤出生产的,并在室温下在单轴压缩下研究了它们的力学行为。结果证明了HA增强Mg材料,降低其微观结构各向异性并抑制变形孪晶的能力。他们还表明,ECAP工艺可有效改善这些复合材料的晶粒结构并降低其晶体织构,尽管最终的压缩应力会恶化,但会显着提高其屈服强度和显微硬度。对流动曲线的应变硬化率的分析表明,HA的添加和ECAP处理也可以有效抑制非基底位错滑移。

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