董建华,王瑞红

• 1:西安理工大学材料科学与工程学院

摘要(Abstract)：

采用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)、显微硬度计、电导率测试仪和拉伸试验等研究了不同含量Er的添加及Mg/Si比对Al-Mg-Si合金微观组织和性能的影响。结果表明：当Mg/Si为0.8及Er的添加量为0.3 mass%时，Al-Mg-Si合金峰值时效后β″相尺寸更小、数密度更大，人工时效强化效果得到提升，显微硬度提高了9%,电导率提高了2%IACS;适量Er(0.3 mass%)的添加诱导形成富含Al、Si、Er元素的第二相，有利于合金的强度和电导率提升；当Mg/Si比为0.4时，合金中由于Si含量的增加，可以析出更多的β″相，但其尺寸略有长大，有更好的时效强化效果，固溶时效后合金的峰值硬度为118 HV0.2,但由于析出相数密度的增大，导致析出相的平均间距变小，对合金电导率不利，由于Si含量的增多，Si与Er相互作用形成更多的富含Al、Si、Er元素的第二相，粗大的第二相不利于合金的塑性。

关键词(KeyWords)： Al-Mg-Si合金;稀土Er;Mg/Si比;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52071260)

作者(Author): 董建华,王瑞红

DOI: 10.13289/j.issn.1009-6264.2024-0325

参考文献(References)：

• [1] 赖玉香.Al-Mg-Si合金时效析出行为的透射电镜研究[D].长沙：湖南大学，2019.LAI Yu-xiang.Transmission electron microscopy for the aging precipitation behavior of Al-Mg-Si alloys[D].Changsha:Hunan University,2019.
• [2] 邓运来，张新明.铝及铝合金材料进展[J].中国有色金属学报，2019,29(9):2115-2141.DENG Yun-lai,ZHANG Xin-ming.Development of aluminium and aluminium alloy[J].The Chinese Journal of Nonferrous Metals,2019,29(9):2115-2141.
• [3] Miller W S,Zhuang L,Bottema J,et al.Recent development in aluminium alloys for the automotive industry[J].Materials Science and Engineering A,2000,280(1):37-49.
• [4] Edwards G A,Stiller K,Dunlop G L,et al.The precipitation sequence in Al-Mg-Si alloys[J].Acta Materialia,1998,46(11):3893-3904.
• [5] Huis A V M,Chen J H,Sluiter M H F,et al.Phase stability and structural features of matrix-embedded hardening precipitates in Al-Mg-Si alloys in the early stages of evolution[J].Acta Materialia,2007,55(6):2183-2199.
• [6] Vissers R,Huis A V M,Jansen J,et al.The crystal structure of the β′ phase in Al-Mg-Si alloys[J].Acta Materialia,2007,55(11):3815-3823.
• [7] Ding L P,Jia Z H,Zhang Z Q,et al.The natural aging and precipitation hardening behaviour of Al-Mg-Si-Cu alloys with different Mg/Si ratios and Cu additions[J].Materials Science and Engineering A,2015,627:119-126.
• [8] Yan L Z,Zhang Y A,Li X W,et al.Effect of Zn addition on microstructure and mechanical properties of an Al-Mg-Si alloy[J].Progress in Natural Science:Materials International,2014,24(2):97-100.
• [9] Chrominski W,Lewandowska M.Precipitation phenomena in ultrafine grained Al-Mg-Si alloy with heterogeneous microstructure[J].Acta Materialia,2016,103:547-557.
• [10] Zandbergen H W,Andersen S J,Jansen J.Structure determination of Mg5Si6 particles in Al by dynamic electron diffraction studies[J].Science,1997,277(5330):1221-1225.
• [11] Kim S N,Kim J H,Kobayashi E,et al.Influence of Mg/Si ratio on nanocluster formation in Al-Mg-Si alloys with constant Mg+Si concentration[J].Materials Transactions,2014,55(11):1647-1655.
• [12] 桑益，陈江华，刘春辉，等.Mg/Si含量比值对Al-Mg-Si 合金析出行为的影响[J].电子显微学报，2012,31(5):384-390.SANG Yi,CHEN Jiang-hua,LIU Chun-hui,et al.A comparison study of precipitation in three Al-Mg-Si alloys with different Mg/Si composition[J].Journal of Chinese Electron Microscopy Society,2012,31(5):384-390.
• [13] Marioara C D,Andersen S J,Zandbergen H W,et al.The influence of alloy composition on precipitates of the Al-Mg-Si system[J].Metallurgical and Materials Transactions A,2005,36(3):691-702.
• [14] Hirth S M,Marshall G J,Court S A,et al.Effects of Si on the aging behaviour and formability of aluminium alloys based on AA6016[J].Materials Science and Engineering A,2001,319(12):452-456.
• [15] Tao G H,Liu C H,Chen J H,et al.The influence of Mg/Siratio on the negative natural aging effect in Al-Mg-Si-Cu alloys[J].Materials Science and Engineering A,2015,642:241-248.
• [16] Maruyama N,Uemori R,Hashimoto N,et al.Effect of silicon addition on the composition and structure of fine-scale precipitates in Al-Mg-Si alloys[J].Scripta Materialia,1997,36(1):89-93.
• [17] M?rtsell Eva A,Marioara Calin D,Andersen Sigmund J,et al.The effects and behaviour of Li and Cu alloying agents in lean Al-Mg-Si alloys[J].Journal of Alloys and Compounds,2017,699:235-242.
• [18] Buchanan K,Colas K,Ribis J,et al.Analysis of the metastable precipitates in peak-hardness aged Al-Mg-Si(-Cu) alloys with differing Si contents[J].Acta Materialia,2017,132:209-221.
• [19] 邱铨强，吴蔚，袁悠悠，等.末道次冷轧变形量对Al-Mg-Si-Cu合金织构和力学性能的影响[J].材料热处理学报，2024,45(1):62-69.QIU Quan-qiang,WU Wei,YUAN You-you,et al.Effect of cold rolling deformation amount of final pass on texture and mechanical properties of Al-Mg-Si-Cu alloy[J].Transactions of Materials and Heat Treatment,2024,45(1):62-69.
• [20] Pereira L H,Asato G H,Otani L B,et al.Changing the solidification sequence and the morphology of iron-containing intermetallic phases in AA6061 aluminum alloy processed by spray forming[J].Materials Characterization,2018,145:507-515.
• [21] Wang R H,Jiang S Y,Chen B A,et al.Size effect in the Al3Sc dispersoid-mediated precipitation and mechanical/electrical properties of Al-Mg-Si-Sc alloys[J].Journal of Materials Science & Technology,2020,57(22):78-84.
• [22] 王振，李亨，唐锴，等.控温变形对Al-Mg-Si-Sc-Zr合金时效及微观组织的影响[J].材料热处理学报，2019,40(12):47-53.WANG Zhen,LI Heng,TANG Kai,et al.Effect of temperature controlled deformation on aging and microstructure of Al-Mg-Si-Sc-Zr alloy[J].Transactions of Materials and Heat Treatment,2019,40(12):47-52.
• [23] 孙顺平，易丹青，陈莹，等.Al-Er 和Si-Er 二元合金的热力学性质[J].中国有色金属学报，2009,19(9):1580-1586.SUN Shun-ping,YI Dan-qing,CHEN Ying,et al.Thermodynamic properties of binary alloys of Al-Er and Si-Er[J].The Chinese Journal of Nonferrous Metals,2009,19(9):1580-1586.
• [24] Hu X W,Jiang F G,Ai F R,et al.Effects of rare earth Er additions on microstructure development and mechanical properties of die-cast ADC12 aluminum alloy[J].Journal of Alloys and Compounds,2012,538:21-27.
• [25] 孙顺平，易丹青，陈振湘，等.Er在Al-Mg-Si合金中的存在形式及其热力学分析[J].材料热处理学报，2011,32(1):138-143.SUN Shun-ping,YI Dan-qing,CHEN Zhen-xiang,et al.Form and thermodynamic analysis of element Er in Al-Mg-Si alloy[J].Transactions of Materials and Heat Treatment,2011,32(1):138-143.
• [26] Pandee P,Patakham U,Limmaneevichitr C.Microstructural evolution and mechanical properties of Al-7Si-0.3Mg alloys with erbium additions[J].Journal of Alloys and Compounds,2017,728:844-853.
• [27] Xu Z,Luan S,Tian S Y,et al.Effect of erbium on microstructure and properties of AA6061 twin-roll casting sheet[J].Journal of Alloys and Compounds,2022,907:164458.
• [28] Wen S P,Xing Z B,Huang H,et al.The effect of erbium on the microstructure and mechanical properties of Al-Mg-Mn-Zr alloy[J].Materials Science and Engineering A,2009,516(1):42-49.
• [29] Liu Z T,Wang B Y,Wang C,et al.Microstructure and mechanical properties of Al-Mg-Si alloy fabricated by a short process based on sub-rapid solidification[J].Journal of Materials Science & Technology,2020,41:178-186.
• [30] Nie J F,Muddle B C.Strengthening of an Al-Cu-Sn alloy by deformation-resistant precipitate plates[J].Acta Materialia,2008,56(14):3490-3501.

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