| 新型Mg-Li-Mn合金的显微组织和力学性能 |
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| 引用本文： | 李红斌,吉海宾,姚广春,刘宜汉,郭志强,刘振刚.新型Mg-Li-Mn合金的显微组织和力学性能[J].过程工程学报,2006,6(3):491-494. |
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| 作者姓名： | 李红斌 吉海宾 姚广春 刘宜汉 郭志强 刘振刚 |
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| 作者单位： | 东北大学材料与冶金学院,辽宁,沈阳,110004;东北大学材料与冶金学院,辽宁,沈阳,110004;东北大学材料与冶金学院,辽宁,沈阳,110004;东北大学材料与冶金学院,辽宁,沈阳,110004;东北大学材料与冶金学院,辽宁,沈阳,110004;东北大学材料与冶金学院,辽宁,沈阳,110004 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 向Mg-9Li合金中添加0.5%~2%(w)Mn，并在室温下对合金板材进行拉伸测试. 结果表明，Mn能够细化a-Mg相，铸态显微组织由a-Mg, b-Li相及富Mn新相组成，合金板材具有较高的强度和良好的延伸率；随着Mn含量的增加，强度不断提高，延伸率有所下降. 通过金相观察、SEM和XRD分析可知，随着Mn含量的增加，其存在形式由固溶状态转变为以富Mn新相为主，对合金起到了强化作用，进而能够提高强度.
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| 关 键 词： | Mg-Li-Mn合金 冷轧 显微组织 力学性能 |
| 文章编号： | 1009-606X（2006）03-0491-04 |
| 收稿时间： | 2005-09-05 |
| 修稿时间： | 2005-10-24 |
Microstructure and Mechanical Properties of Mg-Li-Mn Alloy |
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| LI Hong-bin,JI Hai-bin,YAO Guang-chun,LIU Yi-han,GUO Zhi-qiang,LIU Zhen-gang.Microstructure and Mechanical Properties of Mg-Li-Mn Alloy[J].Chinese Journal of Process Engineering,2006,6(3):491-494. |
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| Authors: | LI Hong-bin JI Hai-bin YAO Guang-chun LIU Yi-han GUO Zhi-qiang LIU Zhen-gang |
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| Affiliation: | School of Materials and metallurgy, Northeastern University |
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| Abstract: | Mg-Li-Mn alloy is produced and rolled to thin sheet at room temperature in the present work. Adding Mn from 0.5% to 2% to the alloy can refine the crystalline grains. The resulting microstructure of alloy consists of α-Mg, β-Li and new Mn-rich phase. Uniaxial tension tests are carried out at room temperature. The prepared sheets have good tensile strengthen and yield strength. They can be raised by 16% and 17%, respectively, with Mn content increasing from 1% to 2%. It is observed that the existence of Mn on the grain boundary makes the grains refined, and hard particles of MgMn2O4 and Li0.5MnO2 forming in the alloy improves its mechanical properties. |
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| Keywords: | Mg-Li-Mn alloy cold-rolling microstructure mechanical properties |
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