Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Study on Hydrogen Effect in TIG Welded Stainless Steel

TIG 용접된 스테인리스강의 수소영향에 대한 연구

  • Lee, Jin-Kyung (Department of Mechanical Engineering, Dongeui University) ;
  • Lee, Sang-Pill (Department of Mechanical Engineering, Dongeui University) ;
  • Bae, Dong-Su (Department of Advanced Materials Engineering, Dongeui University) ;
  • Lee, Joon-Hyun (School of Mechanical Engineering, Pusan National University)
  • Received : 2016.09.09
  • Accepted : 2016.12.09
  • Published : 2016.12.31
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Abstract

A stainless steel has high corrosion resistance because of nickel in material, so it is used as materials for transportation and storage of hydrogen. In this study, TIG(tungsten ingot gas) welding was carried out on the stainless steel using the storage vessel of hydrogen. The microscopic structures at each region of TIG welded material such as HAZ, weld and base metals using optical microscope were observed. And the damage behavior of stainless steel that underwent the hydrogen charging using nondestructive evaluation was also studied. Ultrasonic test, which is the most generalized nondestructive technique, was applied to evaluate the relationship between the ultrasonic wave and mechanical properties at each zone of TIG welded stainless steel. The velocity and attenuation coefficients of ultrasonic wave didn't show a remarkable difference at each region of welded stainless steel. However, the attenuation coefficient was the highest at the weld zone when hydrogen charged stainless steel. In addition, acoustic emission test was also used to study the dynamic behavior of stainless steel experienced both hydrogen charging and weld. Lots of AE event at elastic region of stress-strain curve were occurred both the hydrogen charged specimen and the free specimen.

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References

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Cited by

  1. Characteristics of Ultrasonic Wave on Thermal Shock Damage of Tungsten vol.22, pp.4, 2018, https://doi.org/10.9726/kspse.2018.22.4.005