加载方式对Cu棒晶粒细化的影响.pdfVIP

·机械制造 · 吕枫,等 ·加载方式对Cu棒晶粒细化的影响 - DOI:10.19344/ j.cnki.issn1671 5276.2018.01.007 加载方式对 Cu棒晶粒细化的影响 吕枫,詹金文,马秋晨,李昱龙,林昌棠,邓将华 (福州大学 机械工程及自动化学院,福建 福州350108) 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。 关键词:磁脉冲加载;放电电压;镦粗;晶粒细化 中图分类号:TG391 文献标志码:A 文章编号:1671-5276(2018)01-0025-05 Effect of Loading Ways on Copper Grain Refinement LV Feng,ZHANJinwen,MA Qiuchen,LI Yulong,LIN Changtang,DENGJianghua (Schoolof Mechanical Engineering and Automation,Fuzhou University,Fuzhou350108,China) Abstract:To study the effect of loadingways ongrain refinement,this paper uses testing method to analyzethe influence of mag- - netic pulse loadingandquasi static loadingon upsettingdeformation laws of purecopperand graindeformationfrommacro and mi- cro aspects.Theresults indicatesthattheloadingwayshaveimportant influenceonthegrainrefinement.Withtheincreaseof loading speed andthedecreaseoftheaveragegrainsizeof purecopper,theeffectofthegrainrefinement isenhancedgreatly.Thegrainre- finement efficiency is improved greatly withthe increase of specimendeformationand dischargevoltage undermagnetic pulse load- ing.At the same deformation,the average grainsize under highvoltage is smallerthanthat underlow voltage andthe grain refine- ment under highvoltage is betterthanthat under low voltage. Keywords:magnetic pulse loading;dischargevoltage;upsetting,grain refinement 载对Cu棒镦粗变形规律