【摘要】 本文研究了在Ｆｅ、Ｃｒ、Ｍｎ合金化的Ａｌ_３Ｔｉ基金属间化合物中添加微量元素Ｍｇ所起微合金化的作用。结果发现，Ａｌ_３Ｔｉ基合金仍保持了ＬＩ２的有序结构，微合金化处理的材料金相显微组织与Ｆｅ、Ｃｒ、Ｍｎ等元素合金化处理的材料基本一致，在基体上分布着少量的待定第二相组织，屈服强度明显有所提高，但塑性依然很差，断口表现为穿晶解理。更多还原

【Abstract】 Into the Al₃ Ti-base intermetallic compound alloyed with Fe, Cr and Mn, trace amount of Mg is added and plays a role of microalloying.Results show that the ordered structure of LI₂ is still remained in Al₃ Ti-base alloy; the metalloscopic structure of the material after microalloying is fundamentally the same as that alloyed with elements such as Fe, Cr and Mn; on the substrate is distributed small amount of material of a second phase which remains to be determined; the yield strength is increased obviously, but plasticity is still bad; the fracture shows that of intracrystalline cleavage.更多还原