Phase selection phenomena during low-alloy steel weld solidification

S. S. Babu, S. A. David, J. M. Vitek, J. W. Elmer, Todd Palmer, M. A. Quintana

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Transitions from equilibrium δ-ferrite to nonequilibrium austenite mode of solidification were investigated in a Fe-0.28C - 0.45Mn - 3.7Al (wt.%) steel weld under rapid laser welding and gas tungsten arc spot welding conditions. In laser welds, the transition from δ-ferrite to austenite phase selection did not occur due to geometry of the weld pool restricting the liquid-solid interface velocity below a critical level. In spot-weld, the liquid-solid interface velocity increased above a critical velocity due to sudden arc motion. This increase in the interface velocity lead to nonequilibrium austenite solidification and this phenomenon was confirmed with in-situ time-resolved X-ray diffraction investigation with Synchrotron radiation.

Original languageEnglish (US)
Title of host publicationTrends in Welding Research - Proceedings of the 7th International Conference
Number of pages6
StatePublished - Dec 1 2005
Event7th International Conference on Trends in Welding Research - Pine Mountain, GA, United States
Duration: May 16 2005May 20 2005

Publication series

NameASM Proceedings of the International Conference: Trends in Welding Research


Other7th International Conference on Trends in Welding Research
Country/TerritoryUnited States
CityPine Mountain, GA

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Mechanical Engineering


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