Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Fatigue Damage Behavior in TIG Welded Joint of F82H Steel under Low Cycle Fatigue Loading

저주기 피로부하에서 F82H 강 TIG 용접 접합부의 피로손상거동

  • Kim, Dong-Hyun (Dept. of Mechanical Design Engineering, Youngsan University) ;
  • Park, Ki-Won (Dept. of Green Automobile Engineering, Youngsan University)
  • 김동현 (영산대학교 기계설계학과) ;
  • 박기원 (영산대학교 그린자동차학과)
  • Received : 2015.10.23
  • Accepted : 2015.12.10
  • Published : 2015.12.30
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Abstract

Reduced activation ferritic/martensitic steels are recognized as the primary candidate structural materials for fusion blanket systems. Welding is an inevitable for breeding blanket for pressure tightness and radioisotope confinement. Especially, TIG welding was chosen for sealing because it has the largest gap allowance compared to the other welding methods, and its properties are controllable by feed wire and welding conditions. In this study, the low cycle fatigue test using two-type gage such as extensometer and strain gage was applied to the TIG welded joint of F82H steel, for evaluating fatigue damage accumulation behavior of the HAZs. As the result, the over-tempered HAZ have shown a higher fatigue damage accumulation compared with other materials at all the testing conditions.

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References

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