Title :
Mechanical Characteristics of Austenitic Stainless Steel 316LN Weldments at Cryogenic Temparature
Author :
Sa, J.W. ; Kim, H.K. ; Choi, C.H. ; Kim, H.T. ; Hong, K.H. ; Park, H.K. ; Bak, J.S. ; Lee, K.W. ; Ha, E.T.
Author_Institution :
Korea Basic Sci. Inst., Daejon
Abstract :
KSTAR (Korea superconducting tokamak advanced research) has chosen the stainless steel 316LN as main material for the magnet structure. Two welding methods such as GTAW (gas tungsten arc welding) and EBW (electron beam welding) have applied to achieve proper weld condition and good weld properties. In order to determine the strength and toughness of stainless steel 316LN at low temperature, mechanical tests were carried out at 4 K, 77 K, and room temperature. The weld joint specimens are successfully produced without weld defects. Also yield strength and fracture toughness at 4 K satisfy the structural design criteria
Keywords :
Tokamak devices; arc welding; austenitic stainless steel; cryogenics; electron beam welding; fracture toughness; fusion reactor design; fusion reactor materials; superconducting magnets; 316LN; EBW; GTAW; KSTAR magnet structure; Korea superconducting tokamak advanced research; austenitic stainless steel; cryogenic material; cryogenic temparature; electron beam welding; fracture toughness; gas tungsten arc welding; mechanical characteristics; structural design criteria; weld defects; weld joint specimens; weld properties; Building materials; Cryogenics; Magnetic materials; Plasma welding; Steel; Superconducting magnets; Superconducting materials; Temperature; Tokamaks; Tungsten; EBW(electron beam welding); Fracture toughness; GTAW(gas tungsten arc welding); KSTAR; Stainless steel; component;
Conference_Titel :
Fusion Engineering 2005, Twenty-First IEEE/NPS Symposium on
Conference_Location :
Knoxville, TN
Print_ISBN :
0-4244-0150-X
Electronic_ISBN :
0-4244-0150-X
DOI :
10.1109/FUSION.2005.252881
