REDUCTION OF DISTORTION IN WELDMENTS

In-plane distortion of several basic structural shapes during welding is investigated. Both steel and aluminum are examined. An attempt is made to understand the basic mechanism and to identify the significant characteristics of the process by which materials distort during welding. Theoretical and experimental results are compared to ascertain the applicability of the theoretical models. Currently used theoretical heat flow models are generally in good agreement with experimental results. The most recent version of the Finite Element Program developed at M.I.T. is in dissappointly pour agreement with experimental results. The second phase of this study was intended to discover methods of reducing distortion with ready industrial application. One powerful technique utilizing temperature difference between parts to be joined is presented. Professor K. Masubuchi has coined the term "differential heating" to describe this technique. Results of experiments using differential heating are presented. A theoretical analysis is attempted. An empirical formulation intended to permit application of this method is also presented. Finally, several recommendations are made concerning areas for further investigation of methods for reducing distortion and for applications of differential heating.

  • Corporate Authors:

    Massachusetts Institute of Technology

    Department of Civil Engineering, 77 Massachusetts Avenue
    Cambridge, MA  USA  02139
  • Authors:
    • Serotta, M D
  • Publication Date: 1975-8

Subject/Index Terms

Filing Info

  • Accession Number: 00131220
  • Record Type: Publication
  • Source Agency: Massachusetts Institute of Technology
  • Files: TRIS
  • Created Date: Apr 21 1976 12:00AM