Role of phase transformations in residual stress development in multipass ferritic steel welds and Gleeble test bars

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Neutron strain scanning has proven very effective in non-destructive mapping of the distribution of residual stresses in weldments. Strain scanning of Gleeble test bars of 2 1/4 Cr-1 Mo steel has been carried out in conjunction with strain scanning investigations of a multipass weld in 0.5-in. plate of the same alloy. The residual stresses in the Cleeble bars depend on the time spent at the maximum temperature and the rate of cooling. The longitudinal strains on the Gleeble bar center-line are tensile with a maximum on either side of the central hot zone. The transverse strains are compressive but vary ... continued below

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5 p.

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Spooner, S.; David, S.A. & Hubbard, C.R. December 31, 1995.

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Neutron strain scanning has proven very effective in non-destructive mapping of the distribution of residual stresses in weldments. Strain scanning of Gleeble test bars of 2 1/4 Cr-1 Mo steel has been carried out in conjunction with strain scanning investigations of a multipass weld in 0.5-in. plate of the same alloy. The residual stresses in the Cleeble bars depend on the time spent at the maximum temperature and the rate of cooling. The longitudinal strains on the Gleeble bar center-line are tensile with a maximum on either side of the central hot zone. The transverse strains are compressive but vary with thermal treatment to a higher degree than variations in the longitudinal strains. The difference between strains at the center-line and off the center-line can be significantly greater than statistical error in aircooled Gleeble bars. The strains in the Gleeble bar have a high tensile component parallel to the direction of maximum heat transfer (viz. along the bar axis). By contrast, the large tensile strains in the heat-affected zone (HAZ) of the weldment are along the weld line which is essentially perpendicular to the direction of maximum heat transfer. The simulated conditions present in Gleeble bar test specimens are different from that observed in weld HAZ.

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5 p.

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OSTI as DE96005553

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  • 4. international conference on trends in welding research, Gatlinburg, TN (United States), 5-9 Jun 1995

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  • Other: DE96005553
  • Report No.: CONF-950682--16
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 207054
  • Archival Resource Key: ark:/67531/metadc667345

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  • December 31, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 1, 2016, 9:17 p.m.

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Spooner, S.; David, S.A. & Hubbard, C.R. Role of phase transformations in residual stress development in multipass ferritic steel welds and Gleeble test bars, article, December 31, 1995; Tennessee. (digital.library.unt.edu/ark:/67531/metadc667345/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.