高能球磨Ti/Al粉末挤压固结致密过程数值分析

Numerical simulation of extrusion of high energy milled Ti/Al powders

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摘要基于高能球磨过程中粉末的大塑性变形行为的分析 ,推导了球磨粉体的本构方程 ,并针对球磨Ti/Al粉末的挤压过程进行了有限元模拟。分析结果表明 ,随着球磨时间的延长 ,粉末固结致密难度增加 ,所需挤压力显著增大。该趋势和模拟数值均与挤压实验结果基本一致 ,验证了所推导的球磨粉体本构方程的合理性。 On the basis of analysis of deformation behavior of powders during high energy milling, the plastic constitutive equation of milled powders was established. And using the equation, the extrusion of milled Ti/Al powders was further simulated by finite element method. The simulation results show that, with increasing the milling time, the densification of powders becomes more and more difficult, and the needed extrusion pressure substantially rises. Both the trend and the simulation data agree well with the experimental results, which affirms that the established plastic constitutive equation of milled powders is reasonable.

作者李小强李元元龙雁胡连喜王尔德

机构地区华南理工大学机械工程学院哈尔滨工业大学材料科学与工程学院

出处《中国有色金属学报》 EI CAS CSCD 北大核心 2003年第6期1338-1342,共5页 The Chinese Journal of Nonferrous Metals

基金国家自然科学基金资助项目 (5 9875 0 15 ) 华南理工大学自然科学基金资助项目 (E5 3 0 5 2 93 )

关键词 Ti/Al粉末挤压数值分析高能球磨本构关系合金粉末 Ti/Al powder high energy ball milling plastic constitutive equation extrusion numerical simulation

分类号 TF124 [冶金工程—粉末冶金] TB115 [理学—应用数学]

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中国有色金属学报

2003年第6期

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高能球磨Ti/Al粉末挤压固结致密过程数值分析

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