Transactions of Materials and Heat Treatment

Title：Warm drawing process for 7075-T6 high strength aluminum alloy

Authors： Yang Cheng1 Shi Yuanjing1 Peng Yu1 Zeng Hairui1 Zhao Shengdun2

Unit： 1. School of Metallurgical Engineering Xi′an University of Architecture and Technology 2. School of Mechanical Engineering Xi′an Jiaotong University

KeyWords： 7075-T6 aluminum alloy drawing cylindrical part microstructure forming temperature

ClassificationCode：TG386.3

year,vol(issue):pagenumber：2024,49(10):21-29

Abstract：

In order to explore the influence of intermediate temperature on the deep drawing of 7075-T6 high strength aluminum alloy sheet with the thickness of 0.3 mm, the forming cloud map, wall thickness change, maximum forming height, grain morphology and size of drawing parts at the temperature range of 25-300 ℃ were analyzed by finite element simulation and experiment methods, and the influence laws of forming temperature on forming quality and microstructure of cylindrical parts were obtained. The results show that with the increasing of forming temperature, the wall thickness reduction rate in the dangerous area of sample decreases, and it is easier to draw into cylindrical parts. The maximum forming height increases first and then decreases. The optimal forming temperature is 250 ℃, and the ultimate deep drawing ratio reaches the maximum value of 2.31. With the increasing of forming temperature, the dynamic recovery and dynamic recrystallization softening mechanisms are enhanced, the hardness is reduced, and the plasticity of sheet metal is improved. The error of maximum forming height between finite element simulation and experiment is less than 2.0%, and the simulation model can be used to optimize the parameters of deep drawing process for 7075-T6 aluminum alloy.

Funds：

国家自然科学基金资助项目（52271067）

作者简介：杨程（1976-），男，博士，副教授,E-mail：yang.cheng@stu.xjtu.edu.cn

Reference：

[1]Hajjioui E A, Bouchala K, Faqir M, et al. A review of manufacturing processes, mechanical properties and precipitations for aluminum lithium alloys used in aeronautic applications [J]. Heliyon, 2023, 9(3): e12565.

[2]牛莎莎, 董盈盈. 新能源汽车对车用铝合金产业发展的影响 [J]. 世界有色金属, 2022(14): 154-157.

Niu S S, Dong Y Y. The impact of new energy vehicles on the development of the automotive aluminum alloy industry [J]. World Nonferrous Metals, 2022(14): 154-157.

[3]张钧萍, 方刚, 路洪洲,等. 汽车车身用铝合金板材的研究现状 [J]. 汽车工艺与材料, 2022(8): 10-18.

Zhang J P, Fang G, Lu H Z, et al. Research status on aluminum alloy sheets for automotive body panels [J].Automobile Technology & Material, 2022(8): 10-18.

[4]Fakir O E, Chen S H, Wang L L, et al. Numerical investigation on the hot forming and cold-die quenching of an aluminium-magnesium alloy into a complex component [J]. Materials Science Forum, 2013, 765: 368-372.

[5]张王军, 李云, 吴玉娜,等. 超高强7XXX系铝合金的研究现状及发展趋势 [J].现代交通与冶金材料, 2023,3(3): 52-60，84.

Zhang W J, Li Y, Wu Y N, et al. A critical review of the state-of-the-art of ultra-high strength 7XXX aluminum alloys [J].Modern Transportation and Metallurgical Materials, 2023,3(3): 52-60，84.

[6]黄华. 高强铝合金板材温热成形实验与理论研究 [D]. 上海: 上海交通大学, 2010.

Huang H. Experimental and Theoretical Investigation of Warm Forming of High-strength Aluminum Alloy Sheet [D]. Shanghai：Shanghai Jiao Tong University, 2010.

[7]Finch D M, Wilson S P，Dorn J E. Deep-drawing aluminum alloys at elevated temperatures[J]. ASM Transactions, 1946, 36: 254-289.

[8]刘合军, 郎利辉, 李涛. 铝合金板材温热成形性能 [J]. 塑性工程学报, 2009, 16(3): 145-148,181.

Liu H J, Lang L H, Li T. Investigation of formability of aluminum alloy sheet at elevated temperature [J].Journal of Plasticity Engineering, 2009, 16(3): 145-148,181.

[9]庄蔚敏, 王鹏跃, 高瑞娟,等. 温热成形对AA5754铝合金静态力学性能的影响 [J]. 吉林大学学报(工学版), 2021, 51(3): 847-854.

Zhuang W M, Wang P Y, Gao R J, et al. Effect of hot forming on static mechanical properties of AA5754 aluminum alloy [J]. Journal of Jilin University （Engineering and Technology Edition）, 2021,51(3): 847-854.

[10]Hua L, Zhang W P, Ma H J, et al. Investigation of formability, microstructures and post-forming mechanical properties of heat-treatable aluminum alloys subjected to pre-aged hardening warm forming [J]. International Journal of Machine Tools and Manufacture, 2021, 169（18）: 103799.

[11]高景洲, 赵升吨, 杜威,等. 铝合金板材热冲压成形装备的合理性探讨 [J]. 锻压技术, 2022, 47(9): 168-173.

Gao J Z, Zhao S D, Du W, et al. Discussion on rationality of hot stamping equipment for aluminum alloy sheet [J]. Forging & Stamping Technology, 2022, 47(9): 168-173.

[12]Liu Y, Zhu Z J, Wang Z J, et al. Formability and lubrication of a B-pillar in hot stamping with 6061 and 7075 aluminum alloy sheets [J]. Procedia Engineering, 2017, 207: 723-728.

[13]Serkan Toros，Fahrettin Ozturk，Ilyas Kacar. Review of warm forming of aluminum-magnesium alloys [J]. Journal of Materials Processing Technology, 2008, 207(1-3): 1-12.

[14]吴新星, 范家春, 邢阳,等. 铝合金板温成形和热成形技术应用研究 [J].轻合金加工技术, 2021, 49(1): 22-28.

Wu X X, Fan J C, Xing Y, et al. Application research of warm ＆ hot deformation technology for aluminum alloys [J]. Light Alloy Fabrication Technology, 2021, 49(1): 22-28.

[15]周国伟, 李大永, 彭颖红. 7075-T6高强度铝合金温热条件下的拉深成形性能 [J]. 上海交通大学学报, 2012, 46(9): 1482-1486.

Zhou G W, Li D Y, Peng Y H. Deep drawability of 7075-T6 high strength aluminum alloy at warm condition [J]. Journal of Shanghai Jiao Tong University, 2012, 46(9): 1482-1486.

[16]Ji H C, Ma Z, Huang X M, et al. Damage evolution of 7075 aluminum alloy basing the Gurson Tvergaard Needleman model under high temperature conditions [J]. Journal of Materials Research and Technology, 2022, 16: 398-415.

[17]Jeong H T, Kim H K, Kim W J. Processing maps (with flow instability criterion based on power-law breakdown) integrated into finite element simulations for evaluating the hot workability of 7075 aluminum alloy [J]. Materials Today Communications, 2021, 27: 102254.

[18]Kim H S, Ko M, Ni J. Development of an analytical model for warm deep drawing of aluminum alloys [J]. Journal of Materials Processing Technology, 2008, 197(1-3): 393-407.

[19]范泽. 冲压速度对板料成形性能的影响研究 [D]. 合肥: 合肥工业大学, 2015.

Fan Z. Study of the Effect of Punch Speed on Sheet Metal Forming [D]. Hefei：Hefei University of Technology, 2015.

[20]Wei T, Wang Y D, Tang Z H, et al. The constitutive modeling and processing map of homogenized Al-Mg-Si-Cu-Zn alloy [J]. Materials Today Communications, 2021, 27:102471.

[21]倪炀, 蔡玉俊, 董晓传,等. 7075铝合金高温力学性能及本构方程研究 [J]. 塑性工程学报, 2020, 27(2): 128-134.

Ni Y, Cai Y J, Dong X C, et al. Study on high temperature mechanical properties and constitutive equation of 7075 aluminum alloy [J]. Journal of Plasticity Engineering, 2020, 27(2): 128-134.

[22]彭宇, 杨程, 彭迎娇,等. 7075-T6高强铝合金温热变形本构方程及热加工图 [J]. 锻压技术, 2023, 48(9): 230-238.

Peng Y, Yang C, Peng Y J, et al. Warm deformation constitutive equation and thermal processing map of 7075-T6 high strength aluminum alloy [J]. Forging & Stamping Technology, 2023, 48(9): 230-238.

[23]GB/T 15825.3—2008，金属薄板成形性能与试验方法第3部分：拉深与拉深载荷试验 [S].

GB/T 15825.3—2008，Sheet metal formability and test methods—Part 3: Drawing and drawing load test [S].

[24]Naka T, Yoshida F. Deep drawability of type 5083 aluminium-magnesium alloy sheet under various conditions of temperature and forming speed[J]. Journal of Materials Processing Technology, 1999, 89-90: 19-23.

[25]闫巧云. 超高强7000系铝合金板材温热成形性能研究 [D]. 大连：大连理工大学, 2015.

Yan Q Y. Research of Warm Formability of Ultra-high 7000 Series Aluminum Alloy [D]. Dalian：Dalian University of Technology, 2015.

[26]陈水生, 冯莽, 杨志波. 7075-T6铝合金的高温成形性能和微观组织 [J]. 金属热处理, 2021, 46(6): 191-194.

Chen S S, Feng M, Yang Z B. High temperature formability and microstructure of 7075-T6 aluminum alloy [J]. Heat Treatment of Metals, 2021, 46(6): 191-194.

[27]吴思昕. 7075铝合金预时效—温成形工艺研究 [D]. 长春: 吉林大学, 2021.

Wu S X. Research of PreAging-Warm Forming (PAWF) Process for 7075 Aluminium Alloy [D]. Changchun：Jilin University, 2021.

[28]刘光祖, 李俊峰, 杨延涛,等. 7055铝合金筒形件强力旋压成形规律研究 [J]. 轻合金加工技术, 2022, 50(11): 55-61.

Liu G Z, Li J F, Yang Y T, et al. Study on the high-strength spinning forming of 7055 aluminum alloy cylindrical parts [J].Light Alloy Fabrication Technology, 2022, 50(11): 55-61.

[29]Wang H, Luo Y B, Friedman P, et al. Warm forming behavior of high strength aluminum alloy AA7075 [J]. Transactions of Nonferrous Metals Society of China, 2012, 22(1): 1-7.

[30]仇建桐, 邓沛然, 邵威,等. 6061铝合金热拉深成形研究 [J]. 塑性工程学报, 2020, 27(9): 124-131.

Chou J T, Deng P R, Shao W, et al. Study on hot deep drawing of 6061 aluminum alloy [J]. Journal of Plasticity Engineering, 2020, 27(9): 124-131.

[31]Huo W T, Hou L G, Zhang Y S, et al. Warm formability and post-forming microstructure/property of high-strength AA7075-T6 Al alloy [J]. Materials Science and Engineering A, 2016, 675: 44-54.

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