FATIGUE CRACK GROWTH BEHAVIOR FOR WELDED JOINT OF X80 PIPELINE STEEL

2008 ◽  
Author(s):  
YOUNGPYO KIM ◽  
CHEOLMAN KIM ◽  
WOOSIK KIM ◽  
KWANGSEON SHIN
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Welded Joint ◽  
Pipeline Steel ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Fatigue Crack Growth Behavior ◽  
X80 Pipeline Steel

scholarly journals MECHANICAL CHARACTERISTICS OF 9% Ni STEEL WELDED JOINT FOR LNG STORAGE TANK AT CRYOGENIC

2012 ◽  
Vol 06 ◽  
pp. 355-360 ◽  
Author(s):  
YONG-KEUN YOON ◽  
JAE-HOON KIM ◽  
KYU-TAEK SHIM ◽  
YOUNG-KYUN KIM
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Storage Tank ◽  
Mechanical Characteristics ◽  
Welded Joint ◽  
Growth Behavior ◽  
Safety Performance ◽  
Crack Growth Behavior ◽  
Fatigue Crack Growth Behavior

To confirm the safety performance of LNG storage tank, the change in fatigue crack growth rate and fracture toughness within X-grooved weld heat-affected zone (HAZ) of newly developed 9% Ni steel, which was SMAW welded, was investigated. These materials were produced by QT (quenching, tempering) heat treatment. The weld metal specimens were prepared by taking the same weld procedure applied in actual inner shell of LNG storage tank. All tests were performed in the temperature ranging from R.T. and -162°C. The fatigue crack growth behavior was carried out using CT specimen. Investigation has been carried out to study the influence of temperature and weld effect on fatigue crack growth behavior. Also, Fracture surfaces after tests were observe by scanning electron microscope (SEM).

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