Mn含量对Fe-Mn合金微观组织和阻尼性能的影响  

Effect of Mn content on microstructure and damping capacity of Fe-Mn alloy

作　　者：宋顺远[1] 李宁[1] 滕劲[1] 颜家振[1] 

机构地区：[1]四川大学制造科学与工程学院,四川成都610065

出　　处：《功能材料》2013年第7期993-995,1000,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(11076019)

摘　　要：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。Fe-Mn alloys were prepared by high frequency induction melting in a vacuum atmosphere.The damping capacity was measured using reversal torsion pendulum.The effect of Mn content on microstructure and damping capacity of Fe-Mn alloy was investigated,combining with SEM and TEM.The results indicated that the damping capacity increased with increasing Mn content,attained a maximum at approximately 16.5%Mn,and then decreased with further Mn content.When Mn content is less than 16.5%,with Mn content increasing,the quantity of extended dislocation increased,and at the same time,the mobility increased with the quantity of α′ martensite decreasing,which both leaded to increasing damping capacity.When Mn content is more than 16.5%,the damping capacity decreased for the quantity of extended dislocation decreasing with increasing Mn content.

关 键 词：FE-MN合金 阻尼性能 扩展位错 

分 类 号：TG135.7[一般工业技术—材料科学与工程]