Mg2B2O5wAZ31z镁基复合材料热压缩性能及其织构研究

Mg2B2O5wAZ31z镁基复合材料热压缩性能及其织构研究AbstractIn this study, we investigated the hot compression behavior an

Mg2B2O5wAZ31z 镁基复合材料热压缩性能及其织 构研究 Abstract In this study, we investigated the hot compression behavior and texture evolution of Mg2B2O5wAZ31z magnesium-based composites. The composite samples were prepared by asqueeze casting method. Hot compression tests were conducted at various temperatures and strain rates. The results showed that the composites exhibited better high-temperature mechanical properties compared with the pure AZ31 magnesium alloy. The flow stress and activation energy increased with increasing strain rate and decreasing temperature. The texture analysis revealed that the Mg2B2O5w phase significantly influenced the texture evolution during hot compression. The dominant texture components were basal and prismatic planes of pure Mg2B2O5w, indicating that the Mg2B2O5w phase played an important role in controlling the texture formation during hot deformation. Keywords: magnesium-based composite, Mg2B2O5wAZ31z, hot compression behavior, texture evolution. Introduction In recent years, magnesium-based composites have attracted increasing attention due to their high specific strength and excellent properties, such as ahigh damping capacity and good thermal conductivity [1,2]. The AZ31 magnesium alloy is the most commonly used magnesium alloy due to its good castability, excellent weldability, and relatively low cost. However, it has some limitations, such as poor high-temperature mechanical properties and low wear resistance. To improve these properties, various reinforcements, such as SiC, Al2O3, and carbon fibers, have been added to AZ31 [3,4,5]. Among these reinforcements, metal borides, such as MgB2, AlB2, and TiB2, have been found to be efficient in improving the mechanical properties of Mg-based composites due to their high strength, stiffness, and wear resistance [6,7,8]. Mg2B2O5w is anovel metal boride that has recently attracted considerable attention due to its unique structure and properties [9]. It has alayered structure consisting of MgO and B2O3 layers, which intercalate to form astructure similar to that of graphite [10]. Thus, this