中文摘要：

对Al-Mn合金的显微组织、力学性能以及在不同热处理状态下的力学性能进行了研究。研究结果表明：Al-Mn合金的显微组织为a固溶体基体上分布着AlMn6和Al11Mn4金属间化合物,随着锰含量的增加,析出金属化合物数量增加,晶粒变粗;合金在Mn含量为0.90wt%～2.15wt%的范围内,强度随含Mn量的增加而增加;当含Mn量大于2.15%时,强度随含Mn量的增加而降低。Al-Mn合金的硬度随含锰量的增加而增加,塑性韧性随含Mn量的增加而下降;Al-Mn合金不能通过热处理进行强化。

英文摘要：

Microstructure and mechanics properties of the Al-Mn alloy under different thermal treatment were researched.Research results show that the microstructure of alloy is AlMn6 和Al11Mn4 distributing on a solid basement.With increasing content of Mn,the precipitations increase,and grains become bulky.When the content of Mn is within the range of 0.90%～2.15%,the strength of alloy increases along the content of Mn increaseing.After the content above 2.15%,with the increase of Mn content,the strength decreases.The Al-Mn alloy hardness increases,and its plasticity and toughness decrease,with the increase of Mn content.Al-Mn alloy cannot be intensified by thermal treatment.