Pi Xufeng, Yu Wenbo, Ma Chaosheng, Wang Xiaojun, Xiong ShouMei, Guitton Antoine
Center of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China.
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
Materials (Basel). 2020 Feb 23;13(4):995. doi: 10.3390/ma13040995.
AE44 alloys and nanolaminated TiAlC particle-reinforced AE44 magnesium composites were synthesized by stir casting techniques and textured by hot extrusion methods. It was found that lamellar AlRE precipitates spheroidized with the introduction of TiAlC into the AE44 matrix. Both transmission electron microscope and planar disregistries calculations reveal a good match for interfacial lattice transition between Mg (0001) and the basal plane (0001) of TiAlC. This suggests that TiAlC is an efficient potent nucleating substrate for Mg, thus fertilizing the formation of strong interfacial bonds. After hot extrusion treatment, TiAlC particles were reoriented in the textured magnesium matrix, as confirmed by X-ray diffraction. This texture effect on the composite's mechanical properties was carefully studied by tensile and compressive tests.
采用搅拌铸造技术合成了AE44合金和纳米层状TiAlC颗粒增强AE44镁基复合材料，并通过热挤压方法使其具有织构。研究发现，随着TiAlC引入到AE44基体中，层片状AlRE析出相发生了球化。透射电子显微镜和平面错配计算均表明，Mg(0001)与TiAlC基面(0001)之间的界面晶格过渡匹配良好。这表明TiAlC是镁的一种高效成核基底，从而促进了强界面键的形成。经X射线衍射证实，热挤压处理后，TiAlC颗粒在织构化的镁基体中发生了重新取向。通过拉伸和压缩试验仔细研究了这种织构对复合材料力学性能的影响。
