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材料工程  2016, Vol. 44 Issue (9): 89-95    DOI: 10.11868/j.issn.1001-4381.2016.09.014
  测试与表征 本期目录 | 过刊浏览 | 高级检索 |
7050铝合金时效成形中应力松弛行为与回弹方程
任魏巍1, 邹林池2, 张兴峰1, 符殿宝1, 陈俊锋1
1 福州大学 材料科学与工程学院, 福州 350116;
2 福建工程学院 材料科学与工程学院, 福州 350118
Stress Relaxation Behavior and Springback Equation of 7050 Aluminum Alloys During Age-forming Process
REN Wei-wei1, ZOU Lin-chi2, ZHANG Xing-feng1, FU Dian-bao1, CHEN Jun-feng1
1 College of Materials Science and Engineering, Fuzhou University, Fuzhou 350116, China;
2 School of Materials Science and Engineering, Fujian University of Technology, Fuzhou 350118, China
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摘要 通过自主设计的单向拉伸应力松弛装置研究7050铝合金时效成形过程中的应力松弛行为和回弹方程。结果表明:时效温度范围内7050铝合金的应力松弛曲线表现为典型的对数衰减曲线。该松弛过程可以分为应力快速下降,应力缓慢衰减和应力保持相对恒定3个阶段。随着温度的升高应力松弛极限逐渐降低。由于7050铝合金时效析出与应力松弛中位错蠕变的共同作用引起了松弛过程槛应力现象。通过解析7050铝合金应力松弛行为的特征和松弛曲线的泰勒方程得到该合金在时效温度范围内的应力松弛经验公式,以此获得该合金时效成形过程中的应力松弛方程,并利用该经验公式较好地预测时效成形后试样的回弹率。
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任魏巍
邹林池
张兴峰
符殿宝
陈俊锋
关键词 7050铝合金时效成形应力松弛回弹预测    
Abstract:The stress relaxation behavior and springback equation of 7050 aluminum alloys during the age-forming process were studied through self-designed uniaxial tension device. The results show that in traditional aging temperature, the stress relaxation curve of 7050 aluminum alloys exhibits a classical logarithmic decrement curve. The stress relaxation process can be divided into three stages, which are the initial stress decayed fast stage, the subsequent stress slowly decayed stage and the stress constantly maintained stage, respectively. Stress relaxation limit of 7050 aluminum alloys decreases with increasing aging temperature. The threshold stress presents during the stress relaxation process due to the interaction between precipitation behavior and dislocation creep of 7050 aluminum alloys. The stress relaxation equation of 7050 aluminum alloys is obtained through resolving the feature and Taylor equation of relaxation process, and using the stress relaxation equation can precisely predict the springback of workpiece after age-forming.
Key words7050 aluminium alloy    age-forming    stress relaxation    springback prediction
收稿日期: 2016-03-02      出版日期: 2016-09-27
中图分类号:  TG113.25  
通讯作者: 陈俊锋(1983-),男,博士,讲师,研究方向:轻合金的变形行为,联系地址:福建省福州市闽侯上街镇学园路2号福州大学旗山校区材料科学楼401室(350116),E-mail:chenjunfeng@fzu.edu.cn     E-mail: chenjunfeng@fzu.edu.cn
引用本文:   
任魏巍, 邹林池, 张兴峰, 符殿宝, 陈俊锋. 7050铝合金时效成形中应力松弛行为与回弹方程[J]. 材料工程, 2016, 44(9): 89-95.
REN Wei-wei, ZOU Lin-chi, ZHANG Xing-feng, FU Dian-bao, CHEN Jun-feng. Stress Relaxation Behavior and Springback Equation of 7050 Aluminum Alloys During Age-forming Process. Journal of Materials Engineering, 2016, 44(9): 89-95.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.09.014      或      http://jme.biam.ac.cn/CN/Y2016/V44/I9/89
[1] ZHAN L,LIN J,DEAN T A.A review of the development of creep age forming:experimentation,modelling and applications[J].International Journal of Machine Tools and Manufacture,2011,51(1):1-17.
[2] CHEN J F,ZOU L C,LI Q,et al.Microstructure evolution of 7050 Al alloy during age-forming[J].Materials Characterization,2015,102:114-121.
[3] 王俊彪,刘中凯,张贤杰.大型机翼整体壁板时效成形技术[J].航空学报,2008,29(3):728-733.WANG J B,LIU Z K,ZHANG X J.Age forming of large scale integral aircraft wing panel[J].Acta Aeronautica et Astronautica Sinica,2008,29(3):728-733.
[4] CHEN J F,ZOU L C,LI Q,et al.Effect of stress on precipitation behavior of 7xxx alloy during age forming process[J].Materials Science and Technology,2016,32(1):77-87.
[5] LIN J,HO K C,DEAN T A.An integrated process for modelling of precipitation hardening and springback in creep age-forming[J].International Journal of Machine Tools and Manufacture,2006,46(11):1266-1270.
[6] HUANG L,WANG M,CHI C L,et al.FEM analysis of spring-backs in age forming of aluminum alloy plates[J].Chinese Journal of Aeronautics,2007,20(6):564-569.
[7] CHEN J F,JIANG J T,ZHEN L,et al.Stress relaxation behavior of an Al-Zn-Mg-Cu alloy in simulated age-forming process[J].Journal of Materials Processing and Technology,2014,214(4):775-783.
[8] CHOUDHRY,ASHRAF M.Effect of heat treatment and stress relaxation in 7075 aluminum alloy[J].Journal of Alloys and Compounds,2007,437(2):113-116.
[9] SINHA N K,SINHA S.Stress relaxation at high temperatures and the role of delayed elasticity[J].Materials Science and Engineering:A,2005,393(1):179-190.
[10] 湛利华,阳凌.时效蠕变与时效应力松弛行为转换关系[J].塑性工程学报,2013,20(3):127-131.ZHAN L H,YANG L.Research on conversion relationship between aging creep and aging stress relaxation[J].Journal of Plasticity Engineering,2013,20(3):127-131.
[11] 湛利华,王萌,黄明辉.基于蠕变公式的时效应力松弛行为预测模型[J].机械工程学报,2013,49(10):70-76.ZHAN L H,WANG M,HUANG M H.Prediction model for aging stress-relaxation behavior based on creep equations[J].Journal of Mechanical Engineering,2013,49(10):70-76.
[12] 李超,张坤,汝继刚,等.温度对7050时效成形应力松弛及回弹影响[J].塑性工程学报,2013,20(2):112-115.LI C,ZHANG K,RU J G,et al.Effect of temperature on stress relaxations and springback of 7050 during age forming[J].Journal of Plasticity Engineering,2013,20(2):112-115.
[13] 李超,戴圣龙,张坤,等.应力对7050铝合金时效成形组织和性能的影响[J].航空材料学报,2013,33(2):19-23.LI C,DAI S L,ZHANG K,et al.Effect of stress on microstructure and mechanical properties during age forming process of 7050 aluminum alloy[J].Journal of Aeronautical Materials,2013,33(2):19-23.
[14] XIAO L,BAI J L.Stress relaxation properties and microscopic deformation structure of H68 and QSn6.5-0.1 copper alloys at 353K[J].Materials Science and Engineering:A,1998,244(2):250-256.
[15] LIU Y,ZHU J C.Effects of triple heat treatment on stress relaxation resistance of BT20 alloy[J].Mechanics of Materials,2008,40(10):792-795.
[16] KAIBYSHEV R,SITDIKOV O,MAZURINA I,et al.Deformation behavior of a 2219 Al alloy[J].Materials Science and Engineering:A,2002,334(1-2):104-113.
[17] ?ADEK J,OIKAWA H,ŠUSTEK V.Threshold creep behaviour of discontinuous aluminium and aluminium alloy matrix composites:an overview[J].Materials Science and Engineering:A,1995,190(1-2):9-23.
[18] 刘勇,朱景川,尹钟大,等.TC4合金应力松弛行为[J].金属学报,2002,38(增刊1):255-257.LIU Y,ZHU J C,YIN Z D,et al.Stress relaxation behavior in TC4 alloy[J].Acta Metallurgica Sinica,2002,38(Suppl 1):255-257.
[19] ABDU M T,SOLIMAN M S,ALMAJID A,et al.Creep characteristics and microstructure in nano-particle strengthened AA6082[J].Materials Science and Engineering:A,2012,531(1):35-44.
[20] YANG Y L,ZHAN L H,MA Q Q,et al.Effect of pre-deformation on creep age forming of AA2219 plate:springback,microstructures and mechanical properties[J].Journal of Materials Processing Technology,2016,229:697-702.
[21] YANG Y L,ZHAN L H,LI J.Constitutive modeling and springback simulation for 2524 aluminum alloy in creep age forming[J].Transactions of Nonferrous Metals Society of China,2015,25(9):3048-3055.
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