Numerical and experimental investigation into effect of temperature field on sensitization of Alloy 690 butt welds fabricated by gas tungsten arc welding and laser beam welding

Hwa Teng Lee, Chun Te Chen, Jia Lin Wu

研究成果: Article同行評審

27 引文 斯高帕斯(Scopus)

摘要

This study examines the effects of the temperature field on the sensitization of Alloy 690 butt welds fabricated using the gas tungsten arc welding (GTAW) method and the laser beam welding (LBW) method, respectively. The welding thermal cycles of the two welding methods are simulated using ANSYS software based upon a moving heat source model and the high-temperature thermal physical property data maintained in the JMatPro database. The validity of the numerical model is confirmed by comparing the simulation results with the corresponding experimental findings. It is found that the agreement between the numerical results for the temperature field and the experimental temperature measurements by utilizing the value of the thermal diffusivity (α) in the thermal model for the GTAW and LBW weldments. In addition, it is shown that the LBW weldment experiences a more rapid heating and cooling effect than the GTAW weldment, and therefore has both a smaller heat-affected zone (HAZ) and a narrower sensitization region. Overall, the simulation results presented in this study are found to be in good agreement with the experimental findings. Thus, the validity and general applicability of the thermal welding model are confirmed.

原文English
頁(從 - 到)1636-1645
頁數10
期刊Journal of Materials Processing Technology
210
發行號12
DOIs
出版狀態Published - 2010 9月 1

All Science Journal Classification (ASJC) codes

  • 陶瓷和複合材料
  • 電腦科學應用
  • 金屬和合金
  • 工業與製造工程

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