C5210磷青铜薄板微弯曲回弹的尺寸效应
Size Effect of Micro-bending Spring-Back for C5210 Phosphor Bronze Sheet
摘 要
采用RG-2000型微机控制电子万能试验机，通过微弯曲试验，研究了C5210磷青铜薄板的厚度、晶粒尺寸以及弯曲半径等相关尺寸对其微弯曲回弹的影响。结果表明：C5210磷青铜薄板的厚度、晶粒尺寸和弯曲半径等对其回弹均有显著的影响，具有明显的尺寸效应；薄板的厚度越大，回弹量越小，厚度对回弹量的影响非常显著；薄板的晶粒尺寸越大，回弹量越小，当晶粒尺寸大于40 μm时，回弹量呈缓慢减小趋势；回弹量随着弯曲半径的增大而增大，而且薄板的厚度越小，增大的趋势越明显。
微弯曲
C5210磷青铜
回弹量
size effect
micro-bending
C5210 phosphor bronze
spring-back amount
Abstract
Micro-bending tests were conducted by RG-2000 micro-computer control electronic universal testing machine. The influence of thickness, grain size, bending radius of C5210 phosphor bronze sheet on micro-bending spring-back was researched. Results show that the thickness, grain size, bending radius of C5210 phosphor bronze sheet had a significant effect on the spring-back and that showed an obvious size effect. The spring-back amount decreased as sheet thickness increased, and thickness affected the spring-back amount obviously. The spring-back amount decreased with increasing of grain size, when the grain size was larger than 40 μm, the amount of spring-back decreased slowly. The spring-back amount increased as the bending radius increased, and the trend of increase was more obvious when the thickness of sheet was smaller.
中图分类号 TG146.2 DOI 10.11973/jxgccl201707006
所属栏目 试验研究
基金项目
收稿日期 2016/2/29
修改稿日期 2017/4/12
网络出版日期
作者单位点击查看
备注刘慧慧(1982-),女,安徽阜阳人,高级工程师,硕士
引用该论文: LIU Huihui,WANG Xin,OUYANG Jindong,YI Long,HAO Chuanhai,ZHANG Bo. Size Effect of Micro-bending Spring-Back for C5210 Phosphor Bronze Sheet[J]. Materials for mechancial engineering, 2017, 41(7): 29～33
刘慧慧,王欣,欧阳金栋,易龙,郝传海,张博. C5210磷青铜薄板微弯曲回弹的尺寸效应[J]. 机械工程材料, 2017, 41(7): 29～33
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参考文献
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【3】XU J, YANG H, LI H, et al. Significance-based optimization of processing parameters for thin-walled aluminum alloy tube NC bending with small bending radius[J]. Transactions of Nonferrous Metals Society of China, 2012, 22(1):147-156.
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【5】KUO C C, LIN B T. Optimization of springback for AZ31 magnesium alloy sheets in the L-bending process based on the Taguchi method[J]. The International Journal of Advanced Manufacture Technology, 2012, 58(1):161-173.
【6】ZHU Y X, LIU Y L, YANG H. Sensitivity of springback and section deformation to process parameters in rotary draw bending of thin-walled rectangular H96 brass tube[J]. Transactions of Nonferrous Metals Society of China, 2012, 22(9):2233-2240.
【7】王春举, 汪鑫伟, 郭斌, 等. C2680黄铜箔微弯曲回弹规律研究[J]. 材料科学与工艺, 2009, 17(1):5-7.
【8】STOLKEN J S, EVANS A G. A microbend test method for measuring the plasticity length scale[J]. Acta Materialia, 1998, 46(14):5109-5115.
【9】张永胜,胡丽天. Y-TZP/Al2O3纳米复合陶瓷的压痕尺寸效应[J]. 机械工程材料, 2011, 35(4):95-97.
【10】马增胜,龙士国,韩海生,等. 变形对镍镀层纳米压痕尺寸效应的影响及预测[J]. 机械工程材料, 2008, 32(8):20-22.
【11】GAU J T, PRINCIPE C, YU M. Springback behavior of brass in micro sheet forming[J]. Journal of Materials Processing Technology, 2007, 191(1):7-10.
【12】GAU J T, PRINCIPE C, WANG J. An experimental study on size effects on flow stress and formability of aluminum and brass for microforming[J]. Journal of Materials Processing Technology, 2007, 184(1):42-46.
【13】LI H Z, DONG X H, SHEN Y, et al. Size effect on springback behavior due to plastic strain gradient hardening in microbending process of pure aluminum foils[J]. Materials Science and Engineering A, 2010,527(16):4497-4504.
【14】LI H Z, DONG X H, SHEN Y, et al. Analysis of microbending of CuZn37 brass foils based on strain gradient hardening models[J]. Journal of Materials Processing Technology, 2012, 212(3):653-661.
【15】CHAN K C,WANG S H.Theoretical analysis of springback in bending of integrated circuit leadframes[J]. Journal of Materials Processing Technology, 1999, 91(1/2/3):111-115.
【16】俞叶峰, 穆宏巍, 邹化民. 一种用微弯曲实验测定内禀材料长度的新方法[J]. 材料研究学报, 2007, 21(1):37-40.
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