Numerical and experimental investigation into effect of temperature field on sensitization of AISI 304 in butt welds fabricated by gas tungsten arc welding

Hwa Teng Lee, Chun Te Chen

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This study examines the effect of the temperature field on the sensitization tendencies of AISI 304 two-pass butt welds fabricated using the gas tungsten arc welding (GTAW) method. The thermal cycles induced in the two-pass welding process are simulated using ANSYS software based upon a moving heat source model and the function of Element Birth and Death was employed also in the filled metal GTA welding. The validity of the numerical model is confirmed by comparing the simulation results with the corresponding experimental results. The results show that the heat-affected zone (HAZ) in the 2nd pass specimen is susceptible to intergranular corrosion (IGC). However, the HAZ in the 1st pass specimen shows no obvious signs of IGC. The difference in the sensitization tendencies of the two specimens is attributed to a difference in their respective heating and cooling times.

Original languageEnglish
Pages (from-to)1506-1514
Number of pages9
JournalMaterials Transactions
Volume52
Issue number7
DOIs
Publication statusPublished - 2011 Jul 1

Fingerprint

gas tungsten arc welding
Tungsten
Electric arc welding
Heat affected zone
intergranular corrosion
Welding
Welds
Temperature distribution
temperature distribution
heat affected zone
Gases
Corrosion
welding
tendencies
Numerical models
Metals
heat sources
Cooling
Heating
death

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "This study examines the effect of the temperature field on the sensitization tendencies of AISI 304 two-pass butt welds fabricated using the gas tungsten arc welding (GTAW) method. The thermal cycles induced in the two-pass welding process are simulated using ANSYS software based upon a moving heat source model and the function of Element Birth and Death was employed also in the filled metal GTA welding. The validity of the numerical model is confirmed by comparing the simulation results with the corresponding experimental results. The results show that the heat-affected zone (HAZ) in the 2nd pass specimen is susceptible to intergranular corrosion (IGC). However, the HAZ in the 1st pass specimen shows no obvious signs of IGC. The difference in the sensitization tendencies of the two specimens is attributed to a difference in their respective heating and cooling times.",
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