Mn含量对Al-Mg合金板材组织与性能的影响

发布时间：2019-06-16 12:29

【摘要】：通过拉伸试验和扫描电镜/能谱以及金相分析,研究了Mn含量对Al-Mg合金均匀化组织、退火后的力学性能及显微组织的影响。研究表明,两种成分合金均匀化组织中弥散相多为近等轴状粒子,尺寸约1μm,低Mn含量合金均匀化组织中弥散相数量少于高Mn合金均匀化组织中的弥散相;经480℃×10 s退火后高Mn含量和低Mn含量合金屈服强度分别为113 MPa和84 MPa,断后伸长率分别为23%和26%,退火再结晶平均晶粒大小分别为17μm和27μm。提高合金中Mn含量,板材强度增大,伸长率降低,退火再结晶晶粒尺寸减小;延长退火保温时间,两种合金屈服强度都有所降低,合金显微组织再结晶晶粒随着退火保温时间延长逐渐增大,伸长率逐渐增加。
[Abstract]:The effects of Mn content on homogenized microstructure, mechanical properties and microstructure of Al-Mg alloy after annealing were studied by tensile test, scanning electron microscope / energy dispersive spectroscopy and metallographic analysis. The results show that most of the dispersed phases in the homogenized microstructure of the two alloys are nearly isometric particles with a size of about 1 渭 m, and the number of dispersed phases in the homogenized microstructure of low Mn alloy is less than that of high Mn alloy. After annealing at 480 鈩，

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