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Inverse Thermal Analysis of 21-6-9 Stainless Steel Laser Welds

  • S. G. Lambrakos
Article
  • 144 Downloads

Abstract

Case study results of inverse thermal analyses of 21-6-9 stainless steel laser welds are presented in this article. These analyses employ a methodology that is depicted in terms of analytic basis functions for inverse thermal analysis of steady-state energy deposition in plate structures. The results of the case studies presented provide parametric representations of weld temperature histories that can be adopted as input data to various types of computational procedures, such as those for prediction of solid-state phase transformations. In addition, these temperature histories can be used to construct parametric-function representations for inverse thermal analysis of welds corresponding to other process parameters or welding process conditions of which are within similar regimes. The case studies presented also examine specific aspects the inverse-analysis methodology relevant to further development of algorithms for its application in practice.

Keywords

modeling processes stainless steel welding 

Notes

Acknowledgment

This study was supported by the Naval Research Laboratory (NRL) internal core program.

References

  1. 1.
    S.G. Lambrakos, A.D. Zervaki, G.N. Haidemenopoulos, and V. Stergiou, Basis Functions and Parameterizations for Inverse Analysis of Welding Processes, Mathematical Modelling of Weld Phenomena, Vol. 9, 793, Verlag der Technischen Universite Graz, Austria, 2011, p 793Google Scholar
  2. 2.
    A.D. Zervaki, G.N. Haidemenopoulos, and S.G. Lambrakos, Analysis of Heat Affected Zone Using Direct and Inverse Modelling in 6XXX Aluminum Alloys, Mathematical Modelling of Weld Phenomena, Vol. 8, Verlag der Technischen Universite Graz, Austria, 2007, p 907Google Scholar
  3. 3.
    S.G. Lambrakos and S.G. Michopoulos, Algorithms for Inverse Analysis of Heat Deposition Processes, Mathematical Modelling of Weld Phenomena, Vol. 8, Verlag der Technischen Universite Graz, Austria, 2007, p 847Google Scholar
  4. 4.
    S.G. Lambrakos, J.O. Milewski, Analysis of Welding and Heat Deposition Processes Using an Inverse-Problem Approach, Mathematical Modelling of Weld Phenomena, Vol. 7, Verlag der Technischen Universite Graz, Austria 2005, p 1025–1055Google Scholar
  5. 5.
    J. Xie and J. Zou, Numerical Reconstruction of Heat Fluxes, SIAM J. Numer. Anal., 2005, 43(4), p 1504–1535CrossRefGoogle Scholar
  6. 6.
    A. Tarantola, Inverse Problem Theory and Methods for Model Parameter Estimation, SIAM, Philadelphia, PA, 2005CrossRefGoogle Scholar
  7. 7.
    H.S. Carslaw and J.C. Jaegar: Conduction of Heat in Solids, 2nd ed., Clarendon Press, Oxford, 1959, p 374Google Scholar
  8. 8.
    T.A. Palmer, B. Wood, J.W. Elmer, C. Westrich, J.O. Milewski, M. Piltch, and R. Carpenter, Characterization of Stainless Steel and Refractory Metal Welds Made Using a Diode-Pumped, Continuous Wave Nd:YAG Laser, Report UCRL-ID-146005, Lawrence LivermoreGoogle Scholar

Copyright information

© ASM International 2013

Authors and Affiliations

  1. 1.Center for Computational Materials, Code 6390, Materials Science and Technology DivisionNaval Research LaboratoryWashingtonUSA

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