Transactions of Materials and Heat Treatment

Title：Pulse current auxiliary deep drawing for Al-Li alloy sheet 5A90

Authors： Yi Zhuoxun Lai Xiaoming Wang Bo Zhang Kaifeng Xiao Han

Unit： Beijing Spacecrafts Harbin Institute of Technology

KeyWords： Al-Li alloy 5A90 pulse current deep drawing elongation uniaxial tensile mechanical properties at high temperature

ClassificationCode：TG316

year,vol(issue):pagenumber：2017,42(8):28-32

Abstract：

In order to solve the difficulty in producing Al-Li alloy 5A90, the heating characteristics of sheet 5A90 heated by pulse current were studied by the theoretical analysis and experimental test. It is found that the sheet 5A90 can be heated to 300 ℃ in two minutes by pulse current of 10 A·mm-2. Then, the mechanical properties of sheet 5A90 at high temperature were tested by uniaxial tensile test. The results show that the elongation of sheet 5A90 can reach 63.4% at 300 ℃. Furthermore, based on the study of heating characteristics and mechanical properties, the forming process of workpiece 5A90 is designed, and the stringer 5A90 is successfully formed by the process of pulse current assisted thermoforming. Finally, the dimensional accuracy of the workpiece meets the design requirements and the surface quality is good without cracks and scratches. The pulse current assisted thermoforming technology provides a simple and efficient way for the forming of Al-Li alloy 5A90 parts with thin-wall.

Funds：

国家自然科学基金资助项目（51405487）

易卓勋（1992-），男，硕士，助理工程师王博（1984-），男，博士，高级工程师

Reference：

［1］Wanhill R J H, Prasad N E, Gokhale A A. Aluminum-Lithium Alloys: Processing, Properties and Applications [M]. United Kingdom: Butterworth-Heinemann, 2013.
［2］宋鹏超, 李细锋, 陆彬, 等. 电塑性效应下5A90铝锂合金折弯性能[J]. 塑性工程学报, 2014，21(4): 38-41.Song P C, Li X F, Lu B, et al. Study on the electroplastic effect on the bending properties of 5A90 Al-Li alloys [J]. Journal of Plasticity Engineering, 2014, 21(4):38-41.
［3］郭奕文, 邓运来, 王宇,等. 2024铝合金航空座椅支撑零件等温模锻成形研究[J]. 锻压技术, 2016,41(8): 12-16.Guo Y W, Deng Y L, Wang Y, et al. Study on isothermal mould forging for aviation seat supporting parts of aluminum alloy 2024[J]. Forging & Stamping Technology, 2016, 41(8): 12-16.
［4］方进秀, 莫健华, 崔晓辉,等. 铝合金筒形件的电磁脉冲辅助渐进拉深成形[J]. 塑性工程学报, 2016, 23(3):58-61.Fang J X, Mo J H, Cui X H, et al. Electromagnetic pulse assisted incremental deep drawing of aluminum cylindrical cup[J]. Journal of Plasticity Engineering, 2016, 23(3):58-61.
［5］Salandro W A, Jones J J, Bunget C, et al. Electrically Assisted Forming: Modeling and Control [M]. Germany: Springer, 2015.
［6］王博, 张凯锋, 赖小明, 等. SiCp/2024Al复合材料板材脉冲电流辅助拉深成形[J]. 锻压技术, 2012, 37(5): 22-26.Wang B, Zhang K F, Lai X M, et al. Pulse current auxiliary deep drawing of SiCp/2024Al composites sheet [J]. Forging & Stamping Technology, 2012, 37(5):22-26.
［7］Song H, Wang Z J. Improvement in formability of TiAl and Ti alloys by high density electropulsing [J]. Materials Science & Technology, 2013, 21(5):117-124.
［8］张宁, 张艳苓, 毕静, 等. 1420铝锂合金电致超塑性本构方程[J]. 锻压技术, 2015, 40(5): 63-68.Zhang N, Zhang Y L, Bi J, et al. Constitutive equation of electro-superplastic for 1420 Al-Li alloy[J]. Forging & Stamping Technology, 2015,40(5):63-68.
［9］Hosoi A, Kishi T, Ju Y. Healing of fatigue crack by high-density electropulsing in austenitic stainless steel treated with the surface-activated pre-coating [J]. Materials, 2013, 6(9):4213-4225.
［10］邓德伟, 刘倩倩, 牛婷婷, 等. 脉冲电流对奥氏体不锈钢止裂效果的影响[J]. 热加工工艺, 2015,44 (16) :49-52.Deng D W, Liu Q Q, Niu T T, et al. Effect of pulse current on crack arrest of austenitic stainless steel [J]. Hot Working Technology, 2015, 44(16) :49-52.
［11］杜引, 赵亦希, 于忠奇,等. 2060-T8铝锂合金电致塑性本构方程[J]. 塑性工程学报, 2017, 24(1):133-139.Du Y, Zhao Y X, Yu Z Q, et al. Constitutive equation of electroplastic effect for 2060-T8 Al-Li alloy [J]. Journal of Plasticity Engineering, 2017, 24(1):133-139.
［12］李超, 张凯锋, 蒋少松. 轻合金板材超塑成形中的脉冲电流加热方法及其宏微观分析[J]. 机械工程学报, 2011, 47(18): 43-49.Li C, Zhang K F, Jiang S S. Pulse Current heating method for light alloy superplastic forming and macroscopic and microscopic effects analysis[J]. Journal of Mechanical Engineering, 2011, 47(18):43-49.

Service：

【This site has not yet opened Download Service】【Add Favorite】