通过真空感应电炉熔炼Fe-Mn合金、运用葛氏倒扭摆测量阻尼性能,结合SEM和TEM照片研究了Mn含量对Fe-Mn合金微观组织阻尼性能的影响.结果显示,随着Mn含量的增加,Fe-Mn合金的阻尼性能先增加后减小,在Mn含量为16.5％时取得峰值.原因在于,当Mn含量＜16.5％时,随着Mn含量增加,合金中扩展位错数量增加,同时α’马氏体数量减少直至消失,扩展位错的移动性能增加,合金的阻尼性能增加；当Mn含量＞16.5％以后,合金中的扩展位错数量减少,合金的阻尼性能降低.
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