The effects of nanosized TiB₂ particles on microstructural and mechanical properties of the hot extruded in-situ TiB₂/Al-Cu-Li composite after T6 heat treatment are quantitatively evaluated by using scanning electron microscopy, transmission electron microscopy, electron backscatter diffraction technique and X-ray diffraction. Most TiB₂ particles are aggregated together to form the particle bands. The composite develops the typical fiber textures, <111> and <l00> paralleling to extruded direction, while the matrix alloy only develops weak <111> and <113> textures. The intensity and volume fraction of major texture components can increase significantly with the addition of TiB₂ particles. Due to the introduction of TiB₂ particles, T1 and S phases not only have higher number density, but also are smaller. In addition, the T1 phases can connect with each other to form a continuous network in the composite. The θ’ phase, identified in matrix alloy, is rarely observed in the composite. The yield strength and ultimate tensile strength of composite have increased by 248 MPa and 152 MPa compared with matrix alloy, respectively.

采用扫描电子显微镜，透射电子显微镜，电子背散射衍射技术和扫描电镜，定量评估了纳米尺寸的TiB ₂颗粒对T6热处理后热挤压原位TiB ₂ / Al-Cu-Li复合材料的组织和力学性能的影响。X射线衍射。大多数TiB ₂颗粒聚集在一起形成颗粒带。该复合材料呈现出平行于挤出方向的典型纤维织构<111>和<100>，而基体合金仅呈现出弱的<111>和<113>织构。通过添加TiB ₂，主要纹理成分的强度和体积分数可以显着增加粒子。由于引入了TiB ₂颗粒，T1和S相不仅具有较高的数密度，而且较小。此外，T1相可以相互连接以在复合材料中形成连续网络。在基体合金中确定的θ'相很少在复合材料中观察到。与基体合金相比，复合材料的屈服强度和极限拉伸强度分别提高了248 MPa和152 MPa。