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中文摘要：
通过光学和电子显微镜、XRD分析以及抗拉和蠕变测试,研究热处理对Mg-3Sn-1Mn镁合金组织和性能的影响。结果表明,热处理对Mg-3Sn-1Mn镁合金的组织和性能有明显影响。当在420℃固溶处理后,合金中的大多数Mg2Sn相溶入基体。但在250℃时效处理后,在时效合金的晶界和晶内析出大量细小的Mg2Sn相,从而时效合金的抗拉性能和蠕变性能被明显改善,其强化机理可能与α-Mg基体中Mg2Sn相的弥散析出有关。
英文摘要：
The effects of heat treatment on the microstructure and mechanical properties of Mg-3Sn-1Mn alloy were preliminarily investigated by using optical and electron microscopy,X-ray diffraction（XRD） analysis,and tensile and creep test.The results indicate that the heat treatment has an obvious effect on the microstructure and mechanical properties of the Mg-3Sn-1Mn alloy.After the solid solution treatment at 420 ℃,a majority of the Mg2Sn phases in the alloy are dissolved into the matrix.However,after the further aging treatment at 250 ℃,lots of fine Mg2Sn phases in the aged alloy are precipitated at the grain boundaries and within the grains.As a result,the tensile and creep properties of the aged alloy are significantly improved.The mechanism for the higher tensile and creep properties of the aged alloy is related to the dispersive distribution of the Mg2Sn phase in the--Mg matrix.
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