In-Situ Observations of Phase Transformations in the HAZ of 2205 Duplex Stainless Steel Weldments

Todd Palmer, J. W. Elmer, Joe Wong

Research output: Contribution to conferencePaperpeer-review

Abstract

Ferrite (δ)/austenite (γ) transformations in the heat affected zone (HAZ) of a gas tungsten arc (GTA) weld in 2205 duplex stainless steel are observed in real-time using spatially resolved X-ray diffraction (SRXRD) with high intensity synchrotron radiation. A map showing the locations of the δ and γ phases with respect to the calculated weld pool dimensions has been constructed from a series of SRXRD scans. Regions of liquid, completely transformed γ, a combination of partially transformed γ with untransformed δ, and untransformed δ+γ are identified. Analysis of each SRXRD pattern provides a semi-quantitative definition of both the δ/γ phase balance and the extent of annealing which are mapped for the first time with respect to the calculated weld pool size and shape. A combination of these analyses provides a unique real-time description of the progression of phase transformations in the HAZ. Using these real-time observations, important kinetic information about the transformations occurring in duplex stainless steels during heating and cooling cycles typical of welding can be determined.

Original languageEnglish (US)
Pages108-117
Number of pages10
StatePublished - Dec 1 2001
EventJoining of Advanced and Specialty Materials IV: Proceedings from Materials Solutions 2001 - Indianapolis, IN, United States
Duration: Nov 5 2001Nov 8 2001

Other

OtherJoining of Advanced and Specialty Materials IV: Proceedings from Materials Solutions 2001
CountryUnited States
CityIndianapolis, IN
Period11/5/0111/8/01

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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