Study on Electromagnetic Deformation Combined with Heat Treatment Process of Al-Li Alloy

doi:10.3901/JME.2022.16.058

Abstract

Abstract: In order to solve the forming problem of high-performance Al-Li alloy parts, an electromagnetic deformation combined with heat treatment (ET) is proposed, and the microstructure behavior and mechanical properties advantages of 2195 Al-Li alloy under ET are studied. The process of ET is solution treatment and quenching, followed by electromagnetic deformation, and then artificial aging. Compared with traditional thermomechanical heat treatment (TMT). ET is different in that its pre-deformation method is electromagnetic deformation with the advantages of high forming limit, low die-fitting gap, and excellent surface quality. It is found that the mechanical properties of the ET specimens have the advantages of low yield strength ratio and strong work hardening ability. The ultimate tensile strength, the elongation, and the yield strength ratio of the ET specimen reach 612.3 MPa±2.4 MPa, 11.7%±0.2%, and 86.9%, respectively. The yield strength ratio of the ET specimen is 7% lower than that of the TMT specimen. After the ET component is yielded, it is more stress increase margin to reach the failure stare, which is conducive to the reliable service of the parts. In addition, in the plastic deformation stage, the strain hardening rate of the ET specimen is higher, which is twice of the TMT specimen, indicating that the work hardening ability of the ET specimen is higher. Besides, through texture and Schmid factor analysis, the mechanism of higher work hardening ability of ET specimen is revealed. The (110)//RD texture volume fraction of ET specimen is higher and the Schmid factor is lower, indicating that the subsequent deformation of the ET specimen is greater and the deformation resistance is greater during the plastic deformation process. Through fracture analysis, it is found that both TMT and ET specimens show intergranular fractures and transgranular fractures, and there are local dimple morphologies. The fracture morphology of ET specimens shows a larger area of dimples, which is consistent with the results of the higher plasticity of the ET specimen.

Key words: electromagnetic deformation combined with heat treatment, 2195 Al-Li alloy, work hardening ability, texture, Schmid factor

CLC Number:

TG391

XU Jiahui, HUANG Liang, XIE Bingxin, LI Jianjun. Study on Electromagnetic Deformation Combined with Heat Treatment Process of Al-Li Alloy[J]. Journal of Mechanical Engineering, 2022, 58(16): 58-67.

References

[1] XU Jinjun, JIANG Mang, XIONG Chun. Research progress of Al-Li alloys and its forming technology for aeronautic and astronautic industry[J]. Hot Working Technology, 2019, 48(24): 11-16. 徐进军, 江茫, 熊纯. 铝锂合金及其在航空航天领域成形技术的研究进展[J]. 热加工工艺, 2019, 48(24): 11-16.
[2] WANG Y, ZHAO G. Hot extrusion processing of Al–Li alloy profiles and related issues: A review[J]. Chinese Journal of Mechanical Engineering, 2020, 33(1): 64.
[3] EL-ATY A A, XU Y, GUO X, et al. Strengthening mechanisms, deformation behavior, and anisotropic mechanical properties of Al-Li alloys: A review[J]. J. Adv. Res., 2018, 10: 49-67.
[4] LI Jianjun, XU Jiahui, HUANG Liang, et al. Research progress of thermomechanical treatment process for Al-Li alloy[J]. Forging & Stamping Technology, 2021, 46(11): 1-10. 李建军, 徐佳辉, 黄亮, 等. 铝锂合金形变热处理工艺研究进展[J]. 锻压技术, 2021, 46(11): 1-10.
[5] ZHANG Xing. General development of high strength structural steel with low yield-tensile strength ratio[J]. Wide and Heavy Plate, 2018, 24(4): 35-38. 张兴. 低屈强比高强度结构钢的发展概况[J]. 宽厚板, 2018, 24(4): 35-38.
[6] TAYON W A, NYGREN K E, CROOKS R E, et al. In-situ study of planar slip in a commercial aluminum-lithium alloy using high energy X-ray diffraction microscopy[J]. Acta Materialia, 2019, 173: 231-241.
[7] FENG Zhaohui, YU Juan, HAO Min, et al. Research progress and development trend of aluminum-lithium alloys[J]. Journal of Aeronautical Materials, 2020, 40(1): 1-11. 冯朝晖, 于娟, 郝敏, 等. 铝锂合金研究进展及发展趋势[J]. 航空材料学报, 2020, 40(1): 1-11.
[8] XIAO W, HUANG L, LI J, et al. Investigation of springback during electromagnetic-assisted bending of aluminium alloy sheet[J]. The International Journal of Advanced Manufacturing Technology, 2019, 105(1-4): 375-394.
[9] LIU X L, HUANG L, LI J J, et al. An Electromagnetic incremental forming (EMIF) strategy for large-scale parts of aluminum alloy based on dual coil[J]. International Journal of Advanced Manufacturing Technology, 2019, 104(1-4): 411-431.
[10] HUANG Liang, LUO Wenyong, LIU Xianlong, et al. Research on plastic flow behaviors for hole flanging part of aluminum alloy with large complicated profiles by electromagnetic forming[J]. Journal of Mechanical Engineering, 2013, 49(24): 24-38. 黄亮, 骆文勇, 刘贤龙, 等. 大型复杂型面铝合金翻边件电磁成形塑性流动行为研究[J]. 机械工程学报, 2013, 49(24): 24-38.
[11] CUI X H, MO J H, LI J J, et al. Electromagnetic incremental forming (EMIF): A novel aluminum alloy sheet and tube forming technology[J]. Journal of Materials Processing Technology, 2014, 214(2): 409-427.
[12] XU J R, XIE X Y, WEN Z S, et al. Deformation behaviour of az31 magnesium alloy sheet hybrid actuating with al driver sheet and temperature in magnetic pulse forming[J]. Journal of Manufacturing Processes, 2019, 37: 402-412.
[13] GONG C P, FAN Z S, CHENG L, et al. Predictions of the total electromagnetic repulsion force in electromagnetic riveting process: Numerical analysis model and experiments[J]. Journal of Manufacturing Processes, 2021, 69: 656-670.
[14] YU Haiping, LI Chunfeng, LI Zhong. Numerical simulation of coupled field of electromagnetic forming for tube-compression based on FEM[J]. Journal of Mechanical Engineering, 2006, 42(7): 231-234. 于海平, 李春峰, 李忠. 基于FEM的电磁缩径耦合场数值模拟[J]. 机械工程学报, 2006, 42(7): 231-234.
[15] ZHAO Zhiheng, LI Chunfeng, LI Jianhui, et al. Magnetic field characteristic and magnetic pressure distribution in tube electromagnetic expansion[J]. Journal of Mechanical Engineering, 2005, 41(4): 185-188. 赵志衡, 李春峰, 李建辉, 等. 管坯电磁胀形磁场特性及磁压力分布[J]. 机械工程学报, 2005, 41(4): 185-188.
[16] MENG Zhenghua, HUANG Shangyu, HU Jianhua, et al. Experimental research on warm and electromagnetic hybrid forming of magnesium alloy sheet[J]. Journal of Mechanical Engineering, 2011, 47(10): 38-42. 孟正华, 黄尚宇, 胡建华, 等. 镁合金板材温热电磁复合成形试验研究[J]. 机械工程学报, 2011, 47(10): 38-42.
[17] LI J J, LI L, WAN M, et al. Innovation applications of electromagnetic forming and its fundamental problems[J]. Procedia Manufacturing, 2018, 15: 14-30.
[18] DENG H K, MAO Y F, LI G Y, et al. A study of electromagnetic free forming in AA5052 using digital image correlation method and FE analysis [J]. Journal of Manufacturing Processes, 2019, 37: 595-605.
[19] SU H L, HUANG L, LI J J, et al. Formability of AA 2219-O sheet under quasi-static, electromagnetic dynamic, and mechanical dynamic tensile loadings[J]. Journal of Materials Science & Technology, 2021, 70: 125-135.
[20] LI J J, QIU W, HUANG L, et al. Gradient electromagnetic forming (GEMF): A new forming approach for variable-diameter tubes by use of sectional coil[J]. International Journal of Machine Tools & Manufacture, 2018, 135: 65-77.
[21] XU J H, HUANG L, HONG X D, et al. Research on the electromagnetic blanking based on force-free region deformation: Simulation and experiments[J]. The International Journal of Advanced Manufacturing Technology, 2020, 108(5-6): 1751-1766.
[22] ZHANG Q X, HUANG L, LI J J, et al. Investigation of dynamic deformation behaviour of large-size sheet metal parts under local lorentz force[J]. Journal of Materials Processing Technology, 2019, 265: 20-33.
[23] ZHU H, HUANG L, LI J J, et al. Strengthening mechanism in laser-welded 2219 aluminium alloy under the cooperative effects of aging treatment and pulsed electromagnetic loadings[J]. Materials Science and Engineering: A, 2018, 714: 124-139.
[24] XU J J, DENG Y L, CHEN J Q, et al. Effect of ageing treatments on the precipitation behavior and mechanical properties of Al-Cu-Li alloys[J]. Materials Science and Engineering: A, 2020, 773: 138885.
[25] WANG Y, MA X, XI H, et al. Effects of pre-stretching and aging treatments on microstructure, mechanical properties, and corrosion behavior of spray-formed Al-Li alloy 2195[J]. Journal of Materials Engineering and Performance, 2020, 29(10): 6960-6973.
[26] RODGERS B I, PRANGNELL P B. Quantification of the influence of increased pre-stretching on microstructure-strength relationships in the Al-Cu-Li alloy AA2195[J]. Acta Materialia, 2016, 108: 55-67.
[27] SUN J W, WU G H, ZHANG L, et al. Microstructure characteristics of an ultra-high strength extruded Al-4.7Cu-1Li-0.5Mg-0.1Zr-1Zn alloy during heat treatment[J]. Journal of Alloys and Compounds, 2020, 813: 152216.
[28] WEI X, JIN L, WANG F, et al. High Strength and ductility Mg-8Gd-3Y-0.5Zr alloy with bimodal structure and nano-precipitates[J]. Journal of Materials Science & Technology, 2020, 44: 19-23.
[29] GUMBMANN E, DE GEUSER F, SIGLI C, et al. Influence of Mg, Ag and Zn minor solute additions on the precipitation kinetics and strengthening of an Al-Cu-Li alloy[J]. Acta Materialia, 2017, 133: 172-185.
[30] XIE Bingxin, HUANG Liang, XU Jiahui. Aging precipitation behavior and strengthening mechanism of 2195 Al-Li alloy[J/OL]. [2021-11-18]. The Chinese Journal of Nonferrous Metals, http://ysxb.csu.edu.cn/paper/onlinepaperview.aspx?id=paper_777763. 谢冰鑫, 黄亮, 徐佳辉, 等. 2195铝锂合金时效析出行为与强化机理[J/OL]. [2021-11-18]. 中国有色金属学报, http://ysxb.csu.edu.cn/paper/onlinepaperview.aspx?id=paper_777763.
[31] XIE B X, HUANG L, XU J H, et al. Effect of the aging process and pre-deformation on the precipitated phase and mechanical properties of 2195 Al–Li alloy[J]. Materials Science and Engineering: A, 2022, 832: 142394.
[32] WANG X M, SHAO W Z, JIANG J T, et al. Quantitative analysis of the influences of pre-treatments on the microstructure evolution and mechanical properties during artificial ageing of an Al-Cu-Li-Mg-Ag alloy[J]. Materials Science and Engineering: A, 2020, 782: 139253.
[33] YAN S L, YANG H, LI H W, et al. A unified model for coupling constitutive behavior and micro-defects evolution of aluminum alloys under high-strain-rate deformation[J]. International Journal of Plasticity, 2016, 85: 203-229.
[34] XU Jiahui, HUANG Liang, XU Yike, et al. Research on the thermomechanical treatment of 2195 Al-Li alloy based with pulsed electromagnetic field treatment) [J/OL]. [2021-10-13]. The Chinese Journal of Nonferrous Metals, http://ysxb.csu.edu.cn/paper/onlinepaperview.aspx?id=paper_777529. 徐佳辉, 黄亮, 徐毅珂, 等. 基于脉冲电磁场作用的2195铝锂合金形变热处理研究[J/OL]. [2021-10-13]. 中国有色金属学报, http://ysxb.csu.edu.cn/paper/onlinepaperview.aspx?id=paper_777529.
[35] SU H L, HUANG L, LI J J, et al. Two-step electromagnetic forming: a new forming approach to local features of large-size sheet metal parts[J]. International Journal of Machine Tools & Manufacture, 2018, 124: 99-116.
[36] ZHU H, HUANG L, WANG Z Y, et al. Fracture behaviour of laser-welded 2219-T6 aluminium alloy under pulsed lorentz force[J]. Journal of Materials Science, 2019, 54(13): 9857-9874.
[37] CUI Xiaohui, MO Jianhua, WANG Bo, et al. Loose coupling simulation for electromagnetic sheet forming: 3d finite element method[J]. Journal of Mechanical Engineering, 2011, 47(16): 45-51. 崔晓辉, 莫健华, 王波, 等. 基于松散耦合法的电磁平板成形3D限元仿真[J]. 机械工程学报, 2011, 47(16): 45-51.
[38] SU H L, HUANG L, LI J J, et al. Inhomogeneous deformation behaviors of oblique hole-flanging parts during electromagnetic forming[J]. Journal of Manufacturing Processes, 2020, 52: 1-11.
[39] CHU Hongyan, FEI Renyuan, LU Xin, et al. Relation of sheet metal thickness and deforming depth in electromagnetic forming[J]. Journal of Mechanical Engineering, 2003, 39(3): 62-65. 初红艳, 费仁元, 陆辛, 等. 电磁成形中板料厚度与变形深度的关系[J]. 机械工程学报, 2003, 39(3): 62-65.
[40] LI Z, WANG Y C, CHENG X W, et al. Compressive behavior of a Fe-Mn-Al-C lightweight steel at different strain rates[J]. Materials Science and Engineering: A, 2020, 772: 138700.
[41] ZHANG Chaohua, WANG Xiaoxia, CHANG Maochun, et al. Effects of yield strength of weld metal and material strain hardening on prediction accuracy of welding residual stress and deformation in a Q345 steel joint[J]. Journal of Mechanical Engineering, 2021, 57(10): 160-168. 张超华, 王晓霞, 常茂椿, 等. 焊缝金属的屈服强度和材料的加工硬化对Q345钢焊接残余应力与变形计算精度的影响[J]. 机械工程学报, 2021, 57(10): 160-168.
[42] BO G W, WANG G, JIANG F L, et al. Dynamic softening and microstructural evolution during hot deformation of Al-Cu-Mg-Zr alloys with different homogenization cooling rates[J]. Rare Metals, 2020, 40(3): 626-634.
[43] LIU Y, LU C, WANG H, et al. Microstructure evolution, lattice rotation retardation and grain orientation fragmentation in commercial purity aluminium deformed by high pressure torsion[J]. Journal of Materials Research and Technology, 2020, 9(3): 6642-6654.
[44] TIAMIYU A A, ODESHI A G, SZPUNAR J A. Crash-worthiness of a recently-developed AA 2624 aluminum alloy: Experimental studies[J]. Materials Science and Engineering: A, 2019, 766: 138389.
[45] XU J H, HUANG L, XIE B X, et al. Microstructure evolution and mechanical properties of as-annealed and solution treated Al-Cu-Li alloy 2195 under dynamic compression[J]. Journal of Materials Processing Technology, 2022, 303: 117516.
[46] YU H P, JIN Y Y, HU L H, et al. Mechanical properties of the solution treated and quenched Al–Cu–Li alloy (AA2195) sheet during high strain rate deformation at room temperature[J]. Materials Science and Engineering: A, 2020, 793: 139880.
[47] GODET S, JIANG L, LUO A, et al. Use of schmid factors to select extension twin variants in extruded magnesium alloy tubes[J]. Scripta Materialia. 2006, 55(11): 1055-1058.
[48] LI Hongying, WANG Xiaoyu, YU Weichen. Effect of aging treatment on microstructures and properties of 2050 aluminum lithium alloy[J]. The Chinese Journal of Nonferrous Metals, 2018, 28(12): 2433-2440. 李红英, 王小雨, 余玮琛. 时效制度对2050铝锂合金微观组织和力学性能的影响[J]. 中国有色金属学报, 2018, 28(12): 2433-2440.
[49] ZHANG C S, LIU M F, MENG Z J, et al. Microstructure evolution and precipitation characteristics of spray-formed and subsequently extruded 2195 Al-Li alloy plate during solution and aging process[J]. Journal of Materials Processing Technology, 2020, 283: 116718.
[50] WEN Peigang, LI Guoai, LU Zheng, et al. Effect of aging treatment on fracture behavior of Ai-Li alloy[J]. Failure Analysis and Prevention, 2016, 11(3): 139-142. 温培刚, 李国爱, 陆政, 等. 时效处理对铝锂合金断裂行为的影响[J]. 失效分析与预防, 2016, 11(3): 139-142.