蒋何苗,王小雨,肖翔,李凯,靳东

• 1:中南大学材料科学与工程学院
• 2:中南大学有色金属材料科学与工程教育部重点实验室
• 3:长春汽车制造有限公司
• 4:中铝材料应用研究院有限公司

摘要(Abstract)：

采用维氏硬度计、万能力学试验机、扫描电镜(SEM)和透射电镜(TEM)等研究了预变形量对2024铝合金时效后力学性能和显微组织的影响。结果表明：随着预变形量的增加，合金的时效响应速度加快，硬度达到峰值的时间逐渐缩短，硬度峰值呈现先增加后减小的趋势。当预变形量为2.0%时，合金经190℃×7 h的峰时效，能够获得比较理想的强塑性匹配，其屈服强度达到489.7 MPa,抗拉强度达到509.4 MPa,断后伸长率为11.3%。这是因为当预变形量为2.0%时，合金中S相的数量增加而尺寸减少，能够有效阻碍位错运动，显著提高合金的强度，但会降低塑性。

关键词(KeyWords)： 2024铝合金;预变形;时效;S相

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 蒋何苗,王小雨,肖翔,李凯,靳东

DOI: 10.13289/j.issn.1009-6264.2022-0439

参考文献(References)：

• [1] 张立杰，闫洪.超声振动功率对2024铝合金显微组织、显微硬度及耐腐蚀性能的影响[J].锻压技术，2021,46(9):138-144.ZHANG Li-jie,YAN Hong.Influence of ultrasonic vibration power on microstructure,microhardness and corrosion resistance property for 2024 aluminum alloy[J].Forging Technology,2021,46(9):138-144.
• [2] 骆宏文，徐琨，张文昌，等.烧结温度对Al3(Zr,Ti)/2024Al复合材料组织与性能的影响[J].材料热处理学报，2022,43(4):34-43.LUO Hong-wen,XU Kun,ZHANG Wen-chang,et al.Effect of sintering temperature on microstructure and properties of Al3(Zr,Ti)/2024Al composites[J].Transactions of Materials and Heat Treatment,2022,43(4):34-43.
• [3] 杨淑晟.Al-5.10Cu-0.65Mg(wt.%)合金微观组织与性能研究[D].长沙：湖南大学，2014:.YANG Shu-sheng.Study of the microstructure and properties of Al-5.10Cu-0.65Mg (wt.%) aluminum alloy[D].Changsha:Hunan University,2014.
• [4] 徐晓峰.Al-Cu-Mg-(Ag)/Al-Zn-Mg-Cu-(Ag)合金的组织演变及强韧化研究[D].长春：吉林大学，2015.XU Xiao-feng.Study of the microstructure evolution and toughening-strengthening in Al-Cu-Mg-(Ag)/Al-Zn-Mg-Cu-(Ag) alloys[D].Changchun:Jilin University,2015.
• [5] 刘峤.生产工艺条件下2024铝合金组织性能及改进试验研究[D].长沙：中南大学，2014.LIU Qiao.Research on microstructure,properties and improvement of 2024 aluminum alloy under production process[D].Changsha:Central South University,2014.
• [6] 崔岩，董和谦，曹雷刚，等.55%SiCp/2024Al复合材料时效过程的微观组织与力学性能[J].金属热处理，2022,47(1):142-148.CUI Yan,DONG He-qian,CAO Lei-gang,et al.Microstructure and mechanical properties of 55% SiCp/2024Al composite during aging process[J].Heat Treatment of Metals,2022,47(1):142-148.
• [7] 赵海洋，高多龙，张童，等.电弧增材制造航空AA2024铝合金的微观结构及其腐蚀行为研究[J].中国腐蚀与防护学报，2022,42(4):621-628.ZHAO Hai-yang,GAO Duo-long,ZHANG Tong,et al.Microstructure and corrosion evolution of aerospace AA2024 Al-alloy thin wall structure produced through WAAM[J].Journal of Chinese Society for Corrosion and Protection,2022,42(4):621-628.
• [8] Chen X,Marioara C D,Andersen S J,et al.Precipitation processes and structural evolutions of various GPB zones and two types of S phases in a cold-rolled Al-Mg-Cu alloy[J].Materials & Design,2021,199(1):1-14.
• [9] 牛凤姣，伍翠兰，武静，等.形变时效态Al-3.0Cu-1.8Mg-0.5Si合金的强化机制研究[J].湖南大学学报(自然科学版),2022,49(6):192-202.NIU Feng-jiao,WU Cui-lan,WU Jing,et al.Study on strengthening mechanism of Al-3.0Cu-1.8Mg-0.5Si alloy processed by thermo-mechanical treatment[J].Journal of Hunan University (Natural Sciences),2022,49(6):192-202.
• [10] 殷剑，金康，黎诚.时效处理对7022 铝合金组织与性能的影响[J].材料热处理学报，2022,43(2):49-57.YIN Jian,JIN Kang,LI Cheng.Effect of aging treatment on microstructure and properties of 7022 aluminum alloy[J].Transactions of Materials and Heat Treatment,2022,43(2):49-57.
• [11] 吴杨，黄晖，石薇，等.固溶时效处理对Al-Cu-Mn-Er铸造合金力学性能和显微组织的影响[J].金属热处理，2022,47(6):7-13.WU Yang,HUANG Hui,SHI Wei,et al.Effect of solution and aging treatments on mechanical properties and microstructure of Al-Cu-Mn-Er cast alloy[J].Heat Treatment of Metals,2022,47(6):7-13.
• [12] An L H,Cai Y,Liu W,et al.Effects of pre-deformation on microstructure and mechanical properties in deformation heat treatment of 2219 aluminum alloy sheets[J].Transactions of Nonferrous Metals Society of China,2012,22(S2):370-375.
• [13] 李慧中，张新明，陈明安，等.预变形对2519铝合金组织与力学性能的影响[J].中国有色金属学报，2004(12):1990-1994.LI Hui-zhong,ZHANG Xin-ming,CHEN Ming-an,et al.Effect of pre-deformation on microstructure and mechanical properties of 2519 aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2004 (12):1990-1994.
• [14] 陈敏.预变形方式及时效对2024铝合金组织和性能的影响研究[D].常州：常州大学，2021.CHEN Min.Study on the influence of pre-deformation mode and time effect on the microstructure and properties of aluminum alloy in 2024[D].Changzhou:Changzhou University,2021.
• [15] Hu Z Y,Fan C H,Zheng D S,et al.Microstructure evolution of Al-Cu-Mg alloy during rapid cold punching and recrystallization annealing[J].The Chinese Journal of Nonferrous Metals,2019,29(9):1816-1823.
• [16] 董宇，叶凌英，孙大翔，等.预变形量对2519A-T9I6铝合金力学性能和组织的影响[J].中国有色金属学报，2017,27(12):2434-2442.DONG Yu,YE Ling-ying,SUN Da-xiang,et al.Effect of pre-deformation on microstructure and mechanical properties of 2519A-T9I6 aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2017,27(12):2434-2442.
• [17] Niu F J,Chen J H,Duan S Y,et al.The effect of pre-deformation on the precipitation behavior of AlCuMg(Si) alloys with low Cu/Mg ratios[J].Journal of Alloys and Compounds,2020,823(1):1-9.
• [18] Muggerud A M F,Mortsell E A,Li Y,et al.Dispersoid strengthening in AA3xxx alloys with varying Mn and Si content during annealing at low temperatures[J].Materials Science and Engineering A,2013,567:21-28.
• [19] 郭云月.2024铝合金冷轧板固溶时效热处理工艺参数优化[D].济南：山东大学，2019.GUO Yun-yue.2024 Aluminum alloy cold-rolled plate solid solution aging heat treatment process parameters optimization[D].Jinan:Shandong University,2019.
• [20] 宁爱林，刘志义，曾苏民.时效制度对大冷变形2024铝合金力学性能的影响[J].特种铸造及有色合金，2006(8):529-531.NING Ai-lin,LIU Zhi-yi,ZENG Su-min.Effect of aging on mechanical properties of 2024 aluminum alloy by severe cold plastic deformation[J].Special Casting & Nonferrous Alloys,2006(8):529-531.
• [21] 高川，邓运来，王冯权，等.蠕变时效对欠时效7075铝合金力学性能的影响[J].金属学报，2022,58(6):746-759.GAO Chuan,DENG Yun-lai,WANG Feng-quan,et al.Effect of creep aging on mechanical properties of under-aged 7075 aluminum alloy[J].Acta Metallurgica Sinica,2022,58(6):746-759.
• [22] 余永宁.金属学原理[M].北京：冶金工业出版社，2013.YU Yong-ning.The Principles of Metalliography[M].Beijing:Metallurgical Industry Press,2013.
• [23] 张新明，刘玲，贾寓真.拉伸与轧制预变形对2519A铝合金组织与力学性能的影响[J].中国有色金属学报，2010,20(6):1088-1094.ZHANG Xin-ming,LIU Ling,JIA Yu-zhen.Effects of stretching and rolling pre-deformation on microstructures and mechanical properties of 25l9A aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2010,20(6):1088-1094.
• [24] 郭绘芬，李子岩，李秋睿，等.ECAP对Mg-9Al-1.5Bi-0.5In合金组织及电化学性能的影响[J].中国有色金属学报，2022,32(6):1695-1707.GUO Hui-fen,LI Zi-yan,LI Qiu-rui,et al.Effect of ECAP on microstructure and electrochemical properties of Mg-9Al-1.5Bi-0.5In alloy[J].The Chinese Journal of Nonferrous Metals,2022,32(6):1695-1707.
• [25] 周娴，陈志国，黄裕金，等.微量Ge对Al-1.5Cu-4.0Mg合金时效行为及微观组织的影响[J].中国有色金属学报，2011,21(7):1513-1520.ZHOU Xian,CHEN Zhi-guo,HUANG Yu-jin,et al.Effect of trace addition of Ge on aging behaviour and microstructure of Al-1.5Cu-4.0Mg alloy[J].The Chinese Journal of Nonferrous Metals,2011,21(7):1513-1520.
• [26] 金硕勋.结构材料用Al-Mg-Si-Cu合金的析出强化及细晶强化研究[D].广州：华南理工大学，2019.JIN Shuo-xun.Study on precipitation strengthening and fine-grained strengthening of an Al-Mg-Si-Cu alloy for structural use[D].Guangzhou:South China University of Technology,2019.

文章评论(Comment)：