Thermal-mechanical modeling and experimental validation of weld solidification cracking in 6061-T6 aluminum

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Description

Finite element simulation using an internal state variable constitutive model coupled with a void growth and damage model are used to study weld solidification cracking of 6061-T6 aluminum. Calculated results are compared with data from an experimental program determining the locations of failure as a function of weld process parameters and specimen geometry. Two types of weld solidification cracking specimen were studied. One specimen, in which cracking did not occur, was used to evaluate finite element simulations of the thermal response and calculations of average strain across the weld. The other specimen type was used to determine the location of ... continued below

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9 p.

Creation Information

Dike, J.J.; Brooks, J.A.; Bammann, D.J. & Li, M. December 31, 1997.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Livermore, CA (United States)
    Place of Publication: Livermore, California

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Description

Finite element simulation using an internal state variable constitutive model coupled with a void growth and damage model are used to study weld solidification cracking of 6061-T6 aluminum. Calculated results are compared with data from an experimental program determining the locations of failure as a function of weld process parameters and specimen geometry. Two types of weld solidification cracking specimen were studied. One specimen, in which cracking did not occur, was used to evaluate finite element simulations of the thermal response and calculations of average strain across the weld. The other specimen type was used to determine the location of crack initiation as a function of weld process parameters. This information was used to evaluate the finite element simulations of weld solidification cracking. A solidification model which includes dendrite tip and eutectic undercooling was used in both thermal and mechanical finite element analyses. A strain rate and temperature history dependent constitutive model is coupled with a ductile void growth damage model in the mechanical analyses. Stresses near the weld pool are examined to explain results obtained in the finite element analyses and correlated with experimental observations. Good agreement is obtained between simulation and experiment for locations of crack initiation and extent of cracking. Some effects of uncertainties in material parameters are discussed.

Physical Description

9 p.

Notes

OSTI as DE99001420

Source

  • ASM international conference on welding and joining science and technology, Madrid (Spain), 3-10 Mar 1997

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  • Other: DE99001420
  • Report No.: SAND--97-8582C
  • Report No.: CONF-970369--
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/304022 | External Link
  • Office of Scientific & Technical Information Report Number: 304022
  • Archival Resource Key: ark:/67531/metadc677005

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 31, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • April 12, 2016, 8:21 p.m.

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Dike, J.J.; Brooks, J.A.; Bammann, D.J. & Li, M. Thermal-mechanical modeling and experimental validation of weld solidification cracking in 6061-T6 aluminum, report, December 31, 1997; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc677005/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.