加载方式对Cu棒晶粒细化的影响  

Effect of Loading Ways on Copper Grain Refinement

作　　者：吕枫[1] 詹金文 马秋晨[1] 李昱龙[1] 林昌棠 邓将华[1] LV Feng;ZHAN Jinwen;MA Qiuchen;LI Yulong;LIN Changtang;DENG Jianghua(School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学机械工程及自动化学院,福建福州350108

出　　处：《机械制造与自动化》2018年第1期25-29,共5页Machine Building & Automation

基　　金：国家大学生创新训练计划基金资助项目(201410386006);福州大学SRTP项目基金(21013);福州大学本科专业核心课程立项建设项目(2015-50)

摘　　要：为研究加载方式对材料晶粒细化的影响,采用试验的方法,从宏观和微观角度分析准静态和磁脉冲加载对纯铜棒镦粗变形规律和晶粒变形的影响。结果表明,加载方式对晶粒细化有重要影响,随着加载速率增加,试样晶粒平均尺寸愈小,细化效果愈明显。在磁脉冲加载条件下,随着放电电压增加,试样变形量增加,晶粒细化效果越显著。在相同变形量时,高电压下晶粒平均尺寸较低电压小,高电压比低电压具有更好的晶粒细化效果。To study the effect of loading ways on grain refinement,this paper uses testing method to analyze the influence of magnetic pulse loading and quasi-static loading on upsetting deformation laws of pure copper and grain deformation from macro and micro aspects.The results indicates that the loading ways have important influence on the grain refinement.With the increase of loading speed and the decrease of the average grain size of pure copper,the effect of the grain refinement is enhanced greatly.The grain refinement efficiency is improved greatly with the increase of specimen deformation and discharge voltage under magnetic pulse loading.At the same deformation,the average grain size under high voltage is smaller than that under low voltage and the grain refinement under high voltage is better than that under low voltage.

关 键 词：磁脉冲加载 放电电压 镦粗 晶粒细化 

分 类 号：TG391[金属学及工艺—金属压力加工]