董宇,费文慧,王新宇,何立子,崔建忠,贾品峰

• 1:东北大学新材料技术研究院
• 2:东北大学材料电磁加工重点实验室
• 3:东北大学材料科学与工程学院
• 4:辽宁科技大学材料与冶金学院

摘要(Abstract)：

采用维氏硬度仪、电导率测试和差热分析(DSC)、透射电镜(TEM)等方法研究了在固溶和/或时效过程中施加直流电和交流电对7050合金时效析出行为的影响。结果表明:固溶和/或时效过程中施加电流会提高7050合金的硬度、降低电导率、提高热焓值、降低激活能。120℃常规时效24 h后合金达到峰值强度,而施加直流电或交流电后均在时效6 h后达到峰值强度。固溶过程中施加电流的强化效果优于时效过程,固溶和时效过程均施加电流且施加直流电强化效果最好。

关键词(KeyWords)： 电流场;硬度;固溶;时效;激活能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51574076)

作者(Author): 董宇,费文慧,王新宇,何立子,崔建忠,贾品峰

DOI: 10.13289/j.issn.1009-6264.2019-0045

参考文献(References)：

• [1] Moon-Jo K,Keunho L,Kyu Hwan O,et al.Electric current-induced annealing during uniaxial tension of aluminum alloy[J].Scripta Materialia,2014,75:58-61.
• [2] Zhang Y H,Song C J,Zhu L,et al.Influence of electric-current pulse treatment on the formation of regular eutectic morphology in an Al-Si eutectic alloy[J].Metallurgical and Materials Transactions B,2011,42(3):604-611.
• [3] Liu W,Cui J Z.The effect of electric field on the recrystallization of 2091 Al-Li alloy[J].Journal of Materials Science Letters,1997,16(16):1400-1401.
• [4] Cao Y H,He L Z,Zhou Y Z,et al.Contributions to yield strength in an ultrafine grained 7050 aluminum alloy after DC current annealing[J].Material Science and Engineering A,2016,674:193-202.
• [5] Jia P F,Cao Y H,Geng Y D,et al.Effects of d.c.current on the phase transformation in 7050 alloy during homogenization[J].Materials Characterization,2014,96:21-27.
• [6] Bhaumik S,Molodova X,Molodov D A,et al.Magnetically enhanced recrystallization in an aluminum alloy[J].Scripta Materialia,2006,55(11):995-998.
• [7] Liu W,Liang K M,Zheng Y K,et al.Influence of homogenization treatment in an electric field on the work ability of 1420 Al-Li alloy during hot rolling[J].Journal of Materials Science Letters,1996,15(21):1918-1920.
• [8] He L Z,Cao Y H,Liu X T,et al.Influences of magnetic annealing on the grain growth in a cryoECAPed 1050 aluminum alloy[J].Materials Characterization,2013,84(10):188-195.
• [9] 黎俊初,朱义灯,刘大海.电场固溶对7050铝合金时效成形回弹及力学性能的影响[J],塑性工程学报,2014,21(2):94-97.LI Jun-chu,ZHU Yi-deng,LIU Da-hai.Effects of solution heat treatment with electric field on springback and mechanical properties of 7050 aluminum alloy after age forming[J].Journal of Plasticity Engineering,2014,21(2):94-97.
• [10] Wang J,Conrad H.Effect of electric field on solute solubility in Al alloys measured by hardness[J].Materials Science and Technology,2012,28(9/10):1198-1201.
• [11] Yin D Y,Zhou M Z,Qi N,et al.Precipitation behavior of Al-Cu-Mg alloy during electric field-assisted aging[J].Journal of Materials Engineering and Performance,2013,22(1):206-209.
• [12] 魏齐龙,陈铮,刘兵.电场时效对铝锂合金性能和断裂特征的影响[J].稀有金属,2002,26(3):161-165.WEI Qi-long,CHENG Zheng,LIU Bing,et al.Effect of aging treatment under electric field on properties and fracture characteristics of Al-Li alloys[J].Chinese Journal of Rare Metals,2002,26(3):161-165.
• [13] 王志强,钟云波,饶显君.Cu-Cr-Zr合金在施加直流电流时效后的电性能和力学性能[J].中国有色金属学报,2012,22(5):1106-1111.WANG Zhi-qiang,ZHONG Yun-bo,RAO Xian-jun.Electrical and mechanical properties of Cu-Cr-Zr alloy aged under imposed direct continuous current[J].Transactions of Nonferrous Metals Society of China,2012,22(5):1106-1111.
• [14] 何立子,贾品峰,张林,等.7B04铝合金直流电均匀化过程中的第二相和性能演化[J].中国有色金属学报:英文版,2016(2):319-327.HE Li-zi,JIA Pin-feng,ZHANG Lin,et al.Evolution of secondary phases and properties of 7B04 aluminum alloy during DC homogenization[J].The Chinese Journal of Nonferrous Metals,2016(2):319-327.
• [15] Bush R,Kiyota M,Kiyota C.Characterization of a friction stir weld in aluminum alloy 7055 using microhardness,electrical conductivity,and differential scanning calorimetry (DSC)[J].Metallurgical and Materials Transactions A,2016,47(7):3522-3532.
• [16] 赵兴明,邓厚阳.不同时效处理对7075高强铝合金组织性能的影响[J].热加工工艺,2017,46(14):216.ZHAO Xing-ming,DENG Hou-yang.Effects of different aging treatment on micro structure and properties of 7075 high strength aluminum alloy[J].Hot Working Technology,2017,46(14):216.
• [17] Buha J,Lumley R N,Crosky A G.Secondary aging in an aluminium alloy 7050[J].Materials Science and Engineering,2008,492(1):1-10.
• [18] 陈树川,陈凌冰.材料物理性能[M].上海:上海交通大学出版社,1999.
• [19] Conrad H,Gou Z,Sprecher A F,et al.Electroplasticity the effect of electricity on the mechanical properties of metals[J].Journal of the Minerals Metals and Materials Society,1990,42(9):28-33.
• [20] Ghosh K S,Gao N.Determination of kinetic parameters from calorimetric study of solid state reactions in 7150 Al-Zn-Mg alloy[J].Transactions of Nonferrous Metals Society of China,2011,21(6):1199-1209.
• [21] Deiasi R,Philip N A.Calorimetric studies of 7000 series aluminum alloys:I.Matrix precipitate characterization of 7075[J].Metallurgical Transactions A,1977,8(7):1177-1183.

文章评论(Comment)：