李波,刘大海,邓小范,黎俊初

• 1:南昌航空大学航空制造工程学院

摘要(Abstract)：

为评价铝合金预变形-时效成形工艺的可行性,试验研究了预变形对7075-T6铝合金时效成形性能的影响。研究表明:预变形能显著降低7075-T6铝合金的时效成形回弹率,并在一定程度上提高其塑性,但对其拉伸强度产生不利影响。随着预变形程度的增加,合金的屈服强度和抗拉强度降低,初始强化相GP区减少,η'相向粗大η相的转变,并形成较宽的无沉淀析出带,从而弱化其时效成形强度。

关键词(KeyWords)： 铝合金;时效成形;回弹率;预变形;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51375220);; 江西省自然科学基金(20161BAB206115);; 江西省教育厅科学技术项目(GJJ150709)

作者(Author): 李波,刘大海,邓小范,黎俊初

DOI: 10.13289/j.issn.1009-6264.2017-0115

参考文献(References)：

• [1]Holman M C.Autoclave age forming large aluminum aircraft panels[J].Journal of Mechanical Working Technology,1989,20:477-488.
• [2]Zhan L H,Lin J G,Dean T A.A review of the development of creep age forming:Experimentation,modeling and applications[J].International Journal of Machine Tools and Manufacture,2011,51(1):1-17.
• [3]Khamneh M E,Paykani M E,Shahverdi H,et al.Optimization of springback in creep age forming process of 7075 Al-Alclad alloy using D-optimal design of experiment method[J].Measurement,2016,88:278-286.
• [4]Ho K C,Lin J,Dean T A.Modeling of springback in creep forming thick aluminum sheets[J].International Journal of Plasticity,2004,20(4/5):733-751.
• [5]Han N M,Zhang X M,Liu S D,et al.Effect of pre-stretching and ageing on the strength and fracture toughness of aluminum alloy 7050[J].Materials Science and Engineering A,2011,528:3714-3721.
• [6]Wang H M,Yi Y P,Huang S Q.Influence of pre-deformation and subsequent ageing on the hardening behavior and microstructure of 2219 aluminum alloy forgings[J].Journal of Alloys and Compounds,2016,685:941-948.
• [7]吕凤工,黄遐,曾元松,等.预塑性变形下7B04铝合金蠕变时效成形试验研究[J].锻压技术,2016,41(5):126-130.LFeng-gong,HUANG Xia,ZENG Yuan-song,et al.Experimental research on aluminum alloy 7B04 under pre-plastic deformation in creep age forming[J].Forging&Stamping Technology,2016,41(5):126-130.
• [8]赵建华,陈泽宇,李思宇,等.初始状态对2124铝合金蠕变时效行为与力学性能的影响[J].材料工程,2012(10):63-67.ZHAO Jian-hua,CHEN Ze-yu,LI Si-yu,et al.Effect of initial states on creep aging behaviors and mechanical properties of 2124 aluminum alloy[J].Journal of Materials Engineering,2012(10):63-67.
• [9]Yang Y L,Zhan L H,Shen R L,et al.Effect of pre-deformation on creep age forming of 2219 aluminum alloy:Experimental and constitutive modeling[J].Materials Science and Engineering A,2017,683:227-235.
• [10]Zhou M Z,Yi D Q,Jia Y L,et al.Effect of pre-deformation on aging precipitation process of 2E12 aluminum alloy[J].Rare Metal Materials&Engineering,2010,39(12):2107-2111.
• [11]Michal K,Ketill O P,Sverre G,et al.Effect of pre-deformation on mechanical response of an artificially aged Al-Mg-Si alloy[J].Materials Transactions,2011,52(7):1356-1362.
• [12]宁爱林,刘志义,曾苏民,等.铝合金形变热处理工艺研究进展[J].材料导报,2007,21(3):74-76.NING Ai-lin,LIU Zhi-yi,ZENG Su-min,et al.Research and progress of thermomechanical treatment of aluminum alloy[J].Materials Review,2007,21(3):74-76.
• [13]霍望图,郭明星,侯陇刚,等.铝合金先进形变热处理研究进展[J].材料科学与工程学报,2014,32(2):284-292.HUO Wang-tu,GUO Ming-xing,HOU Long-gang,et al.Progress on research of advanced thermos-mechanical treatment of aluminum alloy[J].Journal of Materials Science&Engineering,2014,32(2):284-292.
• [14]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.
• [15]Kremp E.Viscoplasticity based on total strain.The modelling of creep with special considerations of initial strain and aging[J].Journal of Engineering Material and Technology,1979,101:380-386.
• [16]刘宗昌.材料组织结构转变原理[M].北京:冶金工业出版社,2006.
• [17]刘智恩.材料科学基础[M].西安:西北工业大学出版社,2007:261-265.
• [18]Ferragut R,Somoza A,Tolley A.Microstructural evolution of 7012 alloy during the early stages of artificial ageing[J].Acta Materialia,1999,47(17):4355-4364.
• [19]Berg L K,Gjnnes J,Hansen V,et al.GP-zones in Al-Zn-Mg alloys and their role in artificial aging[J].Acta Materialia,2001,49(17):3443-3451.
• [20]Maloney S K,Hono K,Polmear I J,et al.The chemistry of precipitates in an aged Al-2.1 Zn-1.7 Mg alloy[J].Scripta Materialia,1999,41(10):1031-1038.
• [21]L9ffler H,Kovacs I,Lendvai J.Decomposition processes in Al-Zn-Mg alloys[J].Journal of Materials Science,1983,18(8):2215-2240.
• [22]苏睿明,曲迎东,李荣德,等.时效处理对喷射成形7075合金晶间腐蚀的影响[J].中国有色金属学报,2014,24(3):659-667.SU Rui-ming,QU Ying-dong,LI Rong-de,et al.Effect of aging treatment on intergranular corrosion of spray forming 7075 alloy[J].The Chinese Journal of Nonferrous Metals,2014,24(3):659-667.

文章评论(Comment)：