Process of Cryo-forming for Al-Li Alloy Curved-shaped Components
CSTR:
Author:
Affiliation:

1.School of Mechanical Engineering, Dalian University of Technology, Dalian 116024;2.Beijing Satellite Manufacturing Factory, Beijing 100090

Clc Number:

TG394

  • Article
  • | |
  • Metrics
  • |
  • Reference [11]
  • |
  • Related [20]
  • |
  • Cited by
  • | |
  • Comments
    Abstract:

    To solve the problems of poor formability at room temperature and weakening property at elevated temperature, a new process of cryogenic forming was proposed to form Al-Li alloy curved-shaped compoent, based on the double increase of elongation and work hardening at cryogenic temperature. The deformation behavior of 2195 Al Li alloy sheet at different cryogenic temperatures and heat treatment states was studied. The critical temperature of double hardening was determined to be lower than -140 ℃. The elongation could be increased to more than 40% and the hardening index could reach 0.44. The cryo-forming device was established. The 2195 aluminum lithium alloy spherical bottom with a diameter of 200 mm was formed for the first time. The ratio of depth to diameter reached 0.55, the forming limit was increased by 104%. Finally, the corresponding thickness and springback distributions were clarified, the maximum thinning rate is 10.3%.

    Reference
    [1] DURSUN T, SOUTIS C. Recent developments in advanced aircraft aluminium alloys[J]. Materials & Design, 2014, 56: 862-871.
    [2] 冯朝辉, 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.FENG Zhaohui, YU Juan, HAO Min, et al. Research progress and development trend of Al-Li alloy[J]. Journal of Aeronautical Materials, 2020, 40(1): 1-11.
    [3] 吴秀亮, 刘铭, 臧金鑫, 等. 铝锂合金研究进展和航空航天应用[J]. 材料导报, 2016, 30: 571-578.WU Xiuliang, LIU Ming, ZANG Jinxin, et al. Research progress and aerospace application of aluminum lithium alloys[J]. Material Reports, 2016, 30: 571-578.
    [4] 李劲风, 郑子樵, 陈永来, 等. 铝锂合金及其在航天工业上的应用[J]. 宇航材料工艺, 2012, 42(1): 13-19.LI Jinfeng, ZENG Ziqiao, CHEN Yonglai, et al. Al-Li alloys and their application in aerospace industry[J]. Aerospace Material & Technology, 2012, 42(1): 13-19.
    [5] YUAN S J, FAN XB. Developments and perspectives on the precision forming processes for ultra-large size integrated components[J].International Journal of Extreme Manufacturing, 2019,1(2): 1-18.
    [6] YUAN S J. Fundamentals and processes of fluid pressure forming technology for complex thin-walled components[J]. Engineering, 2021. 7(3): 358-366.
    [7] ZHENG K L, POLITIS D J, WANG L L, et al. A review on forming techniques for manufacturing lightweight complexdshaped aluminium panel components[J]. International Journal of Lightweight Materials and Manufacture, 2018,1(2): 55-80.
    [8] FAKIR O, WANG L L, BALINT D, et al. Numerical study of the solution heat treatment, forming, and in-die quenching (HFQ) process on AA5754[J]. Int. J. Mach. Tool. Manu., 2014, 87: 39-48.
    [9] ZHANG Z C, XU Y C, YUAN S J. Reverse deep drawability of 5A06 aluminum alloy plate at elevated temperatures [J]. Transactions of Nonferrous Metals Society of China, 2016, 26(6): 1538-1545.
    [10] 陈鼎, 陈振华. 铝合金在低温下的力学性能[J]. 宇航材料工艺, 2000,30(4):1-7.CHEN D, CHEN Z H. Mechanical properties of pure aluminum alloys at cryogenic temperatures[J]. Aerospace Materials & Technology, 2000,30(4):1-7.
    [11] CHENG W J, LIU W, FAN X B, et al. Cooperative enhancements in ductility and strain hardening of a solution-treated Al-Cu-Mn alloy at cryogenic temperatures[J]. Materials Science and Engineering: A, 2020, 790:139707.
    Cited by
    Comments
    Comments
    分享到微博
    Submit
Get Citation
Share
Article Metrics
  • Abstract:631
  • PDF: 2091
  • HTML: 344
  • Cited by: 0
History
  • Received:June 01,2021
  • Revised:August 04,2021
  • Adopted:July 26,2021
  • Online: August 25,2021
  • Published: August 30,2021
Article QR Code