TY - JOUR
T1 - Weldability of helium-containing stainless steels using a YAG laser
AU - Kawano, S.
AU - Nakahigashi, S.
AU - Uesugi, K.
AU - Nakamura, H.
AU - Kono, W.
AU - Fukuya, K.
AU - Kano, F.
AU - Hasegawa, A.
AU - Abe, K.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1998/10
Y1 - 1998/10
N2 - Bead-on-plate welding experiments using a 400 W YAG laser were conducted on SUS304 stainless steels implanted with helium ions of 0.5, 5 and 50 appm uniformly to a depth of 0.25 mm. High heat input welding at 20 kJ/cm caused surface grain boundary cracking in the heat-affected zone at 50 appm He. Cross-sectional observations after etching in oxalic acid solution revealed that bubble growth at grain boundaries in the heat-affected zone was enhanced at higher heat input and at higher helium concentrations. Bubble growth was negligible for the laser welding condition of 1 kJ/cm even at 50 appm He. The results suggest that YAG laser welding is a promising welding technique for stainless steels containing high amounts of helium.
AB - Bead-on-plate welding experiments using a 400 W YAG laser were conducted on SUS304 stainless steels implanted with helium ions of 0.5, 5 and 50 appm uniformly to a depth of 0.25 mm. High heat input welding at 20 kJ/cm caused surface grain boundary cracking in the heat-affected zone at 50 appm He. Cross-sectional observations after etching in oxalic acid solution revealed that bubble growth at grain boundaries in the heat-affected zone was enhanced at higher heat input and at higher helium concentrations. Bubble growth was negligible for the laser welding condition of 1 kJ/cm even at 50 appm He. The results suggest that YAG laser welding is a promising welding technique for stainless steels containing high amounts of helium.
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U2 - 10.1016/S0022-3115(98)00342-0
DO - 10.1016/S0022-3115(98)00342-0
M3 - Article
AN - SCOPUS:0032182249
VL - 258-263
SP - 2018
EP - 2022
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
IS - PART 2 B
ER -