7075铝合金热压缩动态软化行为的本构模型
Constitutive Model of Dynamic Softening Behavior of 7075 Aluminum Alloy during Hot Compression
摘 要
在应变速率为0.01~10 s-1、温度为250~450℃的条件下,采用Gleeble-1500型热模拟试验机对7075铝合金进行了高温热压缩试验,得出其变形过程中的真应力-真应变曲线;通过拟合回归分析得出了该合金高温变形过程中的本构模型并对其应变行为进行了预测.结果表明:在峰值应力之前,Fields-Backofen本构模型预测值与试验值比较吻合;在加入软化因子之后,模型的预测值更接近试验值.
热压缩
流变应力
本构模型
7075 aluminum alloy
hot compression
flow stress
constitutive model
Abstract
Hot compression tests of 7075 aluminum alloy were performed on Gleeble-1500 thermal simulater at strain rate of 0.01-10 s-1and deformation temperature of 250-450℃.The true stress-true strain curves during the deformation process were obtained.The constitutive model of the alloy during deformation at high temperatures was obtained through fitting regression and the strain behavior was predicted.The results show that the simulation results of the Fields-Backofen constitutive model agreed well with the test values before the peak value of the flow stress,while the predicted values of the model which contained a softening factor were closer to the test values.
中图分类号 TB301
所属栏目 物理模拟与数值模拟
基金项目 国家科技部技术创新基金资助项目(07C26215110824);重庆市重大科技攻关项目(cstc2009aa3012-1);重庆大学大型仪器设备开放基金资助项目
收稿日期 2009/8/30
修改稿日期 2010/5/16
网络出版日期
作者单位点击查看
备注权国政(1980-),男,河南南阳人,副教授,博士.
引用该论文: QUAN Guo-zheng,LIU Ke-wei,WANG Feng-biao,SONG Tao,ZHOU Yi-jun. Constitutive Model of Dynamic Softening Behavior of 7075 Aluminum Alloy during Hot Compression[J]. Materials for mechancial engineering, 2010, 34(10): 82～86
权国政,刘克威,王凤彪,宋涛,周一俊. 7075铝合金热压缩动态软化行为的本构模型[J]. 机械工程材料, 2010, 34(10): 82～86
共有人对该论文发表了看法，其中：
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】杨立斌,张辉,彭大暑.7075 铝合金高温流变行为的研究[J].热加工工艺,2002,31(1):1-3.
【2】曾渝,尹志民,潘青林,等.超高强铝合金的研究现状及发展趋势[J].中南工业大学学报,2002,33(6):592-596.
【3】林高用,张辉,孟力平,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.
【4】刘文娟,韩冰,袁 成,等.7075铝合金高温等温变形的流变应力特征[J].广东有色金属学报,2004,14(1):44-47.
【5】FIELDS D S,BACKOFEN W A.Determination of strain hardening characteristics by torsion testing[J].Proceedings-American Society of Testing Materials,1957,57:1259-1272.
【6】ZHOU M,CLODE M P.Constitutive equations for model in flow softening due to dynamic recovery and heat generation during plastic deformation[J].Mechanics of Materials,1998,27(2):63-76.
【7】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(3):46-49,95.
【8】邓学峰,张辉,陈振华.耐热铝合金(FVS0812)板材温拉伸本构方程[J].塑性工程学报,2006,13(3):83-87.
【9】王孟君,任杰,黄电源,等.汽车用5182铝合金板材的温拉伸流变行为[J].中国有色金属学报,2008,18(11):1958-1963.
【10】杨积慧.7050铝合金高温流变行为研究[D].长沙:中南大学,2006.
【11】张先宏,崔振山,阮雪榆.镁合金塑性成形技术——AZ31B成形性能及流变应力[J].上海交通大学学报,2003,12(3):1874-1877.
【2】曾渝,尹志民,潘青林,等.超高强铝合金的研究现状及发展趋势[J].中南工业大学学报,2002,33(6):592-596.
【3】林高用,张辉,孟力平,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.
【4】刘文娟,韩冰,袁 成,等.7075铝合金高温等温变形的流变应力特征[J].广东有色金属学报,2004,14(1):44-47.
【5】FIELDS D S,BACKOFEN W A.Determination of strain hardening characteristics by torsion testing[J].Proceedings-American Society of Testing Materials,1957,57:1259-1272.
【6】ZHOU M,CLODE M P.Constitutive equations for model in flow softening due to dynamic recovery and heat generation during plastic deformation[J].Mechanics of Materials,1998,27(2):63-76.
【7】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(3):46-49,95.
【8】邓学峰,张辉,陈振华.耐热铝合金(FVS0812)板材温拉伸本构方程[J].塑性工程学报,2006,13(3):83-87.
【9】王孟君,任杰,黄电源,等.汽车用5182铝合金板材的温拉伸流变行为[J].中国有色金属学报,2008,18(11):1958-1963.
【10】杨积慧.7050铝合金高温流变行为研究[D].长沙:中南大学,2006.
【11】张先宏,崔振山,阮雪榆.镁合金塑性成形技术——AZ31B成形性能及流变应力[J].上海交通大学学报,2003,12(3):1874-1877.
相关信息
