Effect of Ultrasonic Impact on the Microstructure of Welded Joint of 2195 Al–Li Alloy

详细信息    查看全文

• 作者：Qi-Hao Chen ; San-Bao Lin ; Chun-Li Yang…
• 关键词：Ultrasound ; TIG welding ; Microstructure ; Al–Li alloy
• 刊名：Acta Metallurgica Sinica (English Letters)
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：29
• 期：4
• 页码：367-372
• 全文大小：1,788 KB
• 参考文献：[1]A.E. Hughes, R.J. Taylor, B.R.W. Hinton, Surf. Interface Anal. 25, 223 (1997)CrossRef
  [2]H.R. Kotadia, A. Das, E. Doernberg, R. Schmid-Fetzer, Mater. Chem. Phys. 131, 241 (2011)CrossRef
  [3]S.L. Zhang, Y.T. Zhao, X.N. Cheng, G. Chen, Q.X. Dai, J. Alloys Compd. 470, 168 (2009)CrossRef
  [4]L.H. Zhang, Y. Jun, X.M. Zhang, J. Cent, South Univ. Technol. 17, 431 (2010)CrossRef
  [5]H. Puga, S. Costa, J. Barbos, S. Ribeiro, M. Prokic, J. Mater. Process. Technol. 211, 1729 (2011)CrossRef
  [6]M. Qian, A. Ramirez, A. Das, J. Cryst. Growth 311, 3708 (2009)CrossRef
  [7]L.B. He, P. Yang, L.M. Li, M.S. Wu, Ultrasonics 54, 2178 (2014)CrossRef
  [8]Q.J. Sun, S.B. Lin, C.L. Yang, G.Q. Zhao, Sci. Technol. Weld. Join. 14, 765 (2009)CrossRef
  [9]W.L. Dai, Mater. Lett. 57, 2447 (2003)CrossRef
  [10]H.T. Qu, M.E. thesis, Harbin Institute of Technology, 2014 (in Chinese)
  [11]Y. Cui, C.L. Xu, Q. Han, Adv. Eng. Mater. 9, 161 (2007)CrossRef
  [12]L. Nastac, ISIJ Int. 54, 1830 (2014)CrossRef
  [13]J.W. Li, T. Momono, Y. Fu, J. Zheng, Y. Tayu, Trans. Nonferrous Met. Soc. China 17, 691 (2007)CrossRef
  [14]A. Ramirez, Q. Ma, B. Davis, T. Wilks, D.H. Stjohn, Scr. Mater. 59, 19 (2008)CrossRef
  [15]T.V. Atamanenko, D.G. Eskin, L. Zhang, L. Katgerman, Metall. Mater. Trans. A 41, 2056 (2010)CrossRef
  [16]G.I. Eskin, Ultrasonic Treatment of Light Alloy Melts (Gordon and Breach Science Publishers, Amsterdam, 1998)
  [17]Y. Tsunekawa, H. Suzuki, Y. Genma, Mater. Des. 22, 467 (2001)CrossRef
  [18]G. Wang, M.S. Dargusch, M. Qian, D.G. Eskin, D.H. Stjohn, J. Cryst. Growth 408, 119 (2014)CrossRef
  
• 作者单位：Qi-Hao Chen (1)
  San-Bao Lin (1)
  Chun-Li Yang (1)
  Cheng-Lei Fan (1)
  
  1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, PR China
  
• 刊物主题：Metallic Materials; Spectroscopy/Spectrometry; Organometallic Chemistry; Tribology, Corrosion and Coatings; Nanotechnology; Characterization and Evaluation of Materials;
• 出版者：Springer Berlin Heidelberg
• ISSN：2194-1289

文摘

It is known that an ultrasonic impact during tungsten inert gas welding can refine the grains and improve the mechanical properties of the welded joints of aluminum alloys. However, the influence mechanism of the ultrasonic impact on the microstructures is still unclear. In this research, the effects of the mechanical and ultrasonic impact on the microstructures of the welded joint of 2195 Al–Li alloy are analyzed. It is found that the mechanical impact could not refine the grains, but the ultrasonic impact could refine the grains. The grains become smaller in the weld center with an increase in the ultrasonic amplitude. Possible mechanisms for the grain refinement are discussed. The results show that the small temperature gradient promotes formation of the equiaxed grain and the cavitation promotes heterogeneous nucleation.