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摘要：
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材料的变形抗力是进行热加工的依据,其精确的模型是有限元数值模拟的基础和关键。介绍了测试变形抗力的常用试验方法,从影响镁合金高温变形抗力的关键因素着手,研究了当前镁合金变形抗力常用数学模型的构建方法及现状,介绍了当前报道的软化因子、人工神经网络等模型,并比较了各种模型的特点。新型镁合金变形抗力模型的合理构建能为高温变形抗力的预测、数值模拟及后续锻造工艺的制订提供依据。
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Material deformation resistance is the basis of hot working whose reasonable model is the key for finite element method numerical simulation.In the paper,the commonly-used method for testing deformation resistances was introduced and the general modeling technology and status were investigated based on the key factors affecting the resistances of magnesium alloys at high temperatures.Other modeling methods,such as softening factor and artificial neural networks(ANNs) were also discussed.Then the characteristics of the methods were compared.Reasonable model of deformation resistances of new magnesium alloys provided the guidance for predicting the deformation resistances at elevated temperatures,numerical simulation and forging process.
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基金项目：
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教育部重点基金资助项目(No.204085)
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作者简介：
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参考文献：
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[1]何利东,张光明.模拟技术在大型锻件工艺改进方面的应用[J].锻压技术,2006,31(6):12 14.
[2]咸奎峰,张辉,陈振华.AZ31镁合金板温拉深流变应力行为研究[J].锻压技术,2006,31(3):46 47.
[3]周计明,齐乐华,陈国定.热成形中金属本构关系建模方法综述[J].机械科学与技术,2005,24{2}:212 216.
[4]林启权,张辉,彭大暑,等.5182铝合金热压缩变形流变应力[J].湘潭大学自然科学学报,2002,24(3):84 88.
[5]Takuda H.Morishita T,Kinoshita T.Modelling of formulafor flow stress of a magnesium alloy AZ31 sheet at elevatedtemperatures[J].Journal of Materials Processing Technolo-gy,2005,164 165:1258 1262.
[6]Zhang P,Lindemann J.Influence of shot peening on high cy-cle fatigue properties of the high-strength wrought magnesiumalloy AZ80[J].Scripta Materialia,2005,52:485 490.
[7]刘楚明,刘子娟,朱秀荣,等.镁及镁合金动态再结晶研究进展[J].中国有色金属学报,2006,16(1):1 12.
[8]张士宏,王忠堂,许沂.镁合金的塑性加工技术[J].金属成形工艺,2002,20(5):1 4.
[9]Trojanov偄Z,Luk偄P.Compressive deformation behaviourof magnesium alloys[J].Journal of Materials ProcessingTechnology,2005,162 163:416 421.
[10]Barbagallo S,Cavaliere P,Cerri E.Compressive plastic de-formation of an AS21X magnesium alloy produced by highpressure die casting at elevated temperatures[J].MaterialsScience and Engineering,2004,A367:9 16.
[11]夏巨谌,王新云,程俊伟,等.AZ31镁合金管材挤压过程的数值模拟[J].锻压技术,2005,30(2):49 51.
[12]徐文臣,单德彬,李春峰.TA15钛合金的动态热压缩行为及其机理研究[J].航空材料学报,2005,25(4):10 16.
[13]李跃宇,舒小平,刘树春,等.超塑性材料的镦粗变形力的研究[J].锻压技术,2005,30(5):9 11.
[14]牛济泰.材料和热加工领域的物理模拟技术[M].北京:国防工业出版社,1999.
[15]Sheng Z Q,Shivpuri R.Modeling flow stress of magnesiumalloys at elevated temperature[J].Materials Science and En-gineering 2006,A419:202 208.
[16]刘晓霏,严巍,陈国学.AZ31B镁合金塑性变形动态再结晶的实验研究[J].塑性工程学报,2005,12(3):10 13.
[17]林高用,张辉,郭武超,等.7075铝合金热压缩变形流变应力[J].中国有色金属学报,2001,11(3):412 415.
[18]林治平.锻压变形力的工程计算[M].北京:机械工业出版社,1986.
[19]Takuda H,Fuji moto H,Hatta N.Modelling on flow stressof Mg-Al-Zn alloys at elevated temperatures[J].Journal ofMaterials Processing Technology,1998,80 81:513 516.
[20]于翔,丁培道,彭健.AZ61B镁合金热变形动力学的研究[J].热加工工艺,2005,(3):14 16.
[21]Kun Yu,Wenxian Li,Jun Zhao,et al.Plastic deformationbehaviors of a Mg-Ce-Zn-Zr alloy[J].Scripta Materialia,2003,48:1319 1323.
[22]张新明,陈健美,邓运来.Mg2Gd2Y2Zr耐热镁合金的压缩变形行为[J].中国有色金属学报,2005,15(12):19251932.
[23]范永革,汪凌云,黄光胜.变形镁合金高温变形流变应力分析[J].重庆大学学报(自然科学版),2003,26(3):9 11.
[24]Chino Y,Kobata M,Iwasaki H,et al.An investigation ofcompressive deformation behaviour for AZ91 Mg alloy contai-ning a small volume of liquid[J].Acta Materialia,2003,51:3309 3318.
[25]Sellars C M,MeTegart WJ.Hot workability[J].Int.Met-allurg.Rev.,1972,17:1 24.
[26]Shi H,Mclaren AJ,Sellars C M,et al.Constitutive equa-tions for hightemperature flowstress of aluminumalloys[J].Materials Science and Technology,1997,13(3):210 214.
[27]Li L,Zhou J,Duszczyk J.Determination of a constitutive re-lationship for AZ31B magnesiumalloy and validation throughcomparison between si mulated and real extrusion[J].Journalof Materials Processing Technology,2006,172:372 C380.
[28]Cho S H.The prediction of deformation resistance of Al6061during hot deformation[J].J.Kor.Inst.Met.Mater.,1998,36(4):502 508.
[29]郭强,严红革,陈振华.AZ31镁合金高温热压缩变形特性[J].中国有色金属学报,2005,15(6):900 906.
[30]Al-Haik M S,Hussaini M Y,Garmestani H.Prediction ofnonlinear viscoelastic behavior of polymeric composites usingan artificial neural network[J].International Journal ofPlasticity,2006,22:1367 1392.
[31]刘海定,汤爱涛,潘复生.基于BP神经网络的镁合金晶粒尺寸及流变应力模型[J].轻合金加工技术,2006,36(8):48 51.
[32]张先宏.镁合金热变形过程试验研究和数值模拟[博士论文][D].上海:上海交通大学,2003.
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