合金元素对Fe-Mn合金层错几率和阻尼性能的影响
Effect of Alloy Elements on Stacking Fault Probability and Damping Capacity of Fe-Mn Alloy
作者：李宁(四川大学 制造科学与工程学院，四川 成都610065)；黄姝珂(四川大学 制造科学与工程学院，四川 成都610065)；滕劲(四川大学 制造科学与工程学院，四川 成都610065)
Author：(School of Manufacturing Sci. and Eng., Sichuan Univ.,Chengdu 610065,China)；(School of Manufacturing Sci. and Eng., Sichuan Univ.,Chengdu 610065,China)；(School of Manufacturing Sci. and Eng., Sichuan Univ.,Chengdu 610065,China)
收稿日期：2006-12-28 年卷（期）页码：2007,39(4):98-102
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：阻尼合金；阻尼性能；Fe-Mn合金；Shockley不全位错；层错几率
Key words：damping alloy;damping capacity;Fe-Mn;Shockley partial dislocation;stacking fault probability
基金项目：新世纪优秀人才支持计划资助项目(NCET-06-0793);上海交通大学机械系统与振动国家重点实验室开放基金(VSN-2007-04);教育部科学技术研究重点项目（107093）
中文摘要
对Fe-19Mn、Fe-17Mn-2Cr和Fe-19Mn-1.5Si这3种合金的层错几率和阻尼性能进行研究。采用倒扭摆测试合金的阻尼性能，XRD测试合金的层错几率和ε马氏体体积分数。结果表明，3种合金的阻尼性能都随着应变振幅的增加呈现近似线形增加，这可以通过Shockley不全位错的脱钉运动来解释；Si元素增加了Fe-Mn合金的层错几率和Shockley不全位错数量，但是由于原子半径的差异，其引起的晶格畸变很大，产生的空位等缺陷钉扎了Shockley不全位错的运动，因此显著降低了Fe-Mn合金的阻尼性能；
英文摘要
The stacking fault probability and damping capacity of Fe-19Mn,Fe-17Mn-2Cr and Fe-19Mn-1.5Si alloys were studied. The damping capacity was measured using reversal torsion pendulum. The stacking fault probability and volume fraction of ε-martensite were determined using XRD. The result indicated that the damping capacity of three alloys increases almost linearly with the increasing of strain amplitude. This can be explained using the breakaway model of Shockley partial dislocations. Si increases the stacking fault probability and the number of Shockley partial dislocations of Fe-Mn alloy, but decreases the damping capacity because it introduces much distortions of lattice which pin the moving of Shcokley partial dislocations. Cr also decreases the damping capacity of Fe-Mn alloy, but its effect is not heavier than Si because the distortion of lattice after adding Cr is not more serious than adding Si.
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