CuNiSiP合金的动态再结晶行为
Dynamic Recrystallization Behavior of CuNiSiP Alloy
摘 要
在Gleeble-1500D热模拟试验机上对CuNiSiP合金在高温压缩变形中的流变应力和组织变化进行了研究,分析了其再结晶行为.结果表明:应变速率和变形温度对合金的再结晶影响较大,在0.1,0.01 s-1应变速率下,650 ℃以上即可发生再结晶,而在1,5 s-1应变速率下,700 ℃以上才能发生再结晶;变形温度越高、应变速率越小,合金越容易发生再结晶;利用Arrhenius双曲正弦函数求得CuNiSiP合金的热变形激活能Q为485.6 kJ·mol-1.
热压缩变形
动态再结晶
热模拟
CuNiSiP alloy
hot compression deformation
dynamic recrystallization
hot simulation
Abstract
The flow stress behavior and microstructure change of CuNiSiP alloy during hot compression deformation process were studied by isothermal compression test on Gleeble-1500D thermal-mechanical simulator.The results show that both strain rate and deforming temperature had great effect on the dynamic recrystallization of the alloy.When the strain rates were 0.1 and 0.01 s-1,recrystallization could happened when the temperature was higher than 650 ℃.However,when the strain rates were 1 and 5 s-1,the recrystallization could happened only when the temperature was higher than 700 ℃.The higher the temperature,and the smaller the strain rate,the easier the dynamic recrystallization.The hot deformation activation energy of the CuNiSiP alloy was gained by Arrhenius hyperbolic sine function to be Q=485.6 kJ·mol-1.
中图分类号 TG146.1 TG113.2
所属栏目 物理模拟与数值模拟
基金项目 国家863计划资助项目(2006AA03Z528);国家自然科学基金资助项目(50571035);河南省杰出青年基金资助项目(0521001200)
收稿日期 2007/11/13
修改稿日期 2008/3/19
网络出版日期
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备注李银华(1982-),女,河南西华人,硕士研究生.
引用该论文: LI Yin-hua,LIU Ping,JIA Shu-guo,ZHANG Yi,TIAN Bao-hong,REN Feng-zhang. Dynamic Recrystallization Behavior of CuNiSiP Alloy[J]. Materials for mechancial engineering, 2008, 32(11): 82～85
李银华,刘平,贾淑果,张毅,田保红,任凤章. CuNiSiP合金的动态再结晶行为[J]. 机械工程材料, 2008, 32(11): 82～85
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【3】张红钢,张辉,彭大暑,等.KFC铜合金热压缩变形流变应力[J].热加工工艺,2004(1):121-24.
【4】李红英,欧 玲,张建飞,等.一种新型Al-Cu-Li系合金的热压缩流变应力[J].北京科技大学学报,2006,28(8):750-754.
【5】Bardi F,Cabibbo M.An analysis of hot deformation of an Al-Cu-Mg alloy produced by power metallurgy[J].Mater Sci Eng A,2003,339(1/2):43-53.
【6】王战锋,张辉,张昊,等.喷射沉积5A06铝合金热压缩变形的流变应力行为[J].中国有色金属学报,2006,11(16):1938-1944.
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【12】Davenpot S B,Silk N J,Sparks C N,et al.Development of constitutive equations for modeling of hot rolling[J].Mater Sci and Technol,2000,16(5):539-546.
【13】Gao W,Belyakov A.Dynamic recrystallization of copper polycrystal with different purities[J].Materials Science and Engineering,1999,A265:233-236.
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