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

fYear

2005

fDate

Sept. 2005

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/FUSION.2005.252881

Filename

4018915