7075铝合金对AZ91镁合金组织和性能的影响

稀有金属材料与工程, 2013, 42(12): 2576-2580.

7075铝合金对AZ91镁合金组织和性能的影响

毛萍莉 ^1, , 杨春海 ^2, , 张越 ^3, , 王峰 ^4, , 刘正 ^5,

1.沈阳工业大学,辽宁沈阳110870

2.沈阳工业大学,辽宁沈阳110870

3.沈阳工业大学,辽宁沈阳110870

4.沈阳工业大学,辽宁沈阳110870

5.沈阳工业大学,辽宁沈阳110870

基金项目: 辽宁省工业公关计划资助项目(2013201018)

关键词： AZ91镁合金 , 7075铝合金 , 显微组织 , 力学性能

Effect of 7075 Al Alloy on Microstructures and Mechanical Properties of AZ91 Mg Alloy

Mao Pingli ^1, , Yang Chunhai ^2, , Zhang Yue ^3, , Wang Feng ^4, , Liu Zheng ^5,

1.沈阳工业大学,辽宁沈阳110870

2.沈阳工业大学,辽宁沈阳110870

3.沈阳工业大学,辽宁沈阳110870

4.沈阳工业大学,辽宁沈阳110870

5.沈阳工业大学,辽宁沈阳110870

Keywords： AZ91 magnesium alloy , 7075 aluminum alloy , microstructure , mechanical properties

为了研究7075铝合金对AZ91镁合金组织与性能的影响,采用光学显微镜、扫描电镜、X射线衍射仪、万能材料试验机研究了AZ91镁合金的显微组织与力学性能.结果表明:向AZ91镁合金中加入7075铝合金可使该合金的铸态组织明显细化,当7075铝合金含量超过4％(质量分数,下同)时,AZ91镁合金铸态组织中Mg17Al12相数量明显减少,并且组织中生成了A16Mn新相.合金抗拉强度与延伸率随着7075铝合金加入量的增加而提高,当7075铝合金的加入达到4％,其抗拉强度与延伸率达到最大值,分别为186 MPa和8.2％.

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