磁场热处理对M2052合金阻尼性能的影响  

Effect of magnetic field heat treatment ondamping capacity of M2052 alloy

作　　者：张思斌 江泽超 田青超 李传军[1] 任忠鸣[1] ZHANG Sibin;JIANG Zechao;TIAN Qingchao;LI Chuanjun;REN Zhongming(State Key Laboratory of Advanced Special Steel,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学省部共建高品质特殊钢冶金与制备国家重点实验室,上海200444

出　　处：《功能材料》2020年第10期10138-10144,共7页Journal of Functional Materials

摘　　要：对M2052合金进行磁场热处理,利用金相显微镜、XRD、动态机械分析仪和拉伸试验机研究了交变磁场对合金阻尼性能和力学性能的影响。结果表明,由于磁致塑性效应和位错增值机制,磁场固溶可以提高合金的位错密度,且位错作为顺磁中心可使磁性转变温度T N上升,并加速磁性转变过程。磁场时效会提高合金的T M,同时增加合金的内耗峰值。磁场热处理后的合金晶粒尺寸减小,细晶强化作用使合金的抗拉强度提高约25 MPa。合金在拉伸过程中存在孪晶-去孪晶现象,最后沿拉伸方向形成较强的[111]取向和微弱的[001]取向。Magnetic field was applied to the M2052 alloy during the heat treatment process.The effects of the alternating magnetic field on the damping capacity and mechanical properties of the alloy were studied by using metallurgical microscope,XRD,dynamic mechanical analyzer,and tensile testing machine.The results show that,due to the magnetoplastic effect and the dislocation increment mechanism,solid solution under magnetic field could increase the dislocation density of the alloy,and dislocation as a paramagnetic center could increase the magnetic transition temperature T N and accelerate the magnetic transition process.Aging under magnetic field could increase the T M as well as the peak internal friction of the alloy.After the magnetic field heat treatment,the alloy grain size was reduced,and then the fine grain strengthening effect increased the alloy's tensile strength by about 25 MPa.During the tensile process,the alloy exhibited a twinning-de-twinning phenomenon,and finally formed a strong[111]orientation and a weak[001]orientation along the stretching direction.

关 键 词：磁场热处理 阻尼合金 弹性模量 内耗 力学性能 

分 类 号：TG146[一般工业技术—材料科学与工程]