采用粉末冶金法制备了20%Ti-6A1-4V颗粒增强MB15镁基复合材料的试样.按照阿基米得法检测了不同状态试样的密度,借助光镜和扫描电镜探索了挤压棒变形和组织的特点,并结合室温拉伸试验研究了热挤压变形对试样组织及力学性能的影响规律.结果表明:烧结态的密度较低,而热挤后的密度已接近理论值;挤压棒的变形和组织都不均匀;二次挤压可以进一步细化晶粒、提高复合材料的力学性能;Ti-6Al-4V颗粒可以用来强化镁合金,且其增强效果明显好于SiC陶瓷颗粒.
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