【作者】 滕劲； 李宁； 宋顺远； 文玉华； 黄姝珂；

【Author】 Jin TENG1,Ning LI1,Shunyuan SONG1,Yuhua WEN1,Shuke HUANG2 1 School of Manufacturing Science and Engineering,Sichuan University,Chengdu,Sichuan,China,610065 2 Institute of Mechanical Manufacturing Technology,China Academy of Engineering Physics,Mianyang,621900

【机构】 四川大学制造科学与工程学院； 中国工程物理研究院机械制造工艺研究所；

【摘要】 研究了不同C含量对Fe-Mn阻尼合金组织和性能的影响。通过光学显微镜和透射电镜观察合金的微观组织,倒扭摆测试合金的阻尼性能。结果表明,Fe-Mn合金的阻尼性能是由合金内扩展位错的运动引起,且随应变振幅的增大而增大;C元素的加入显著恶化Fe-Mn合金的阻尼性能,这是由于一方面C元素提高了合金的层错能,减少了合金中的层错数量,进而减少了合金阻尼源界面,另一方面,C原子作为间隙原子,易偏聚于层错区形成能力更低的铃木气团,钉扎阻碍阻尼源界面的移动,进一步降低了合金的阻尼性能。更多还原

【Abstract】 The effects of C content on microstructure and damping capacity of Fe-Mn alloy have been studied.The microstructure was observed using optical microscope and TEM.The damping capacity was measured using reversal torsion pendulum with free decay method.The results showed that the damping capacity of Fe-Mn alloy increased with the increasing strain amplitude which could be explained by the movement of the extended dislocations.The addition of C deteriorated the damping capacity of Fe-Mn alloy observably.This is because that C element will increase the SFE and decrease the amount of stacking faults and extended dislocations of Fe-Mn alloy.And moreover,Suzuki atmosphere caused by the segregation of C atoms will pin the movement of extended dislocations.更多还原