热循环对Fe-19Mn阻尼合金组织和性能的影响  

Effect of Thermal Cycling on Microstructure and Properties of Fe-19Mn Damping Alloy

作　　者：黎为[1] 李宁[1] 滕劲[1] 文玉华[1] 

机构地区：[1]四川大学制造学院材料成型系,四川成都610065

出　　处：《热加工工艺》2010年第6期6-8,11,共4页Hot Working Technology

基　　金：教育部科学技术研究重点资助项目(1070939);教育部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资助项目(MSV-2009-11)

摘　　要：采用Olympus光学显微镜XRD以及倒扭摆法,研究了热循环温度对Fe-19Mn合金的微观组织和阻尼性能的影响。结果表明,当热循环温度在As以下时,ε马氏体形貌基本保持不变,由于淬火空位的浓度降低,阻尼性能提高;当热循环温度在As与Af之间,合金内马氏体明显粗大,减少了合金阻尼源界面,阻尼性能降低;当热循环温度高于Af时,由于反复的ε圮γ相变过程,导致马氏体形貌的明显改变,进而影响到合金的阻尼性能,随循环温度的提高,合金的马氏体形貌和阻尼性能都逐渐恢复到固溶态水平。The effects of thermal cycling temperature on microstructure and damping capacity of Fe-19Mn alloy were studied by Olympus optical microscope,XRD and reversal torsion pendulum. The results show that,when upper peak temperature is below As,the damping capacity is improved due to quenched-vacancy decaying. When upper peak temperature is between As and Af,because ε martensite plates become wider,the interface phase between ε martensite decreases,which reduces damping capacity dramatically. When upper peak temperature is above Af,the morphology of the alloy greatly changes owing to the repetition of εγ,which alters the damping capacity of the alloy. With the increase of temperature,the morphology of martensite and damping capacity of the alloy return to as-quenched gradually.

关 键 词：Fe-19Mn合金 热循环 阻尼性能 Ε马氏体 

分 类 号：TG135.7[一般工业技术—材料科学与工程]