Weldability of helium-containing stainless steels using a YAG laser

Kawano, Shohei; Nakahigashi, S.; Uesugi, Kentaro; Nakamura, Harumasa; Kono, Wataru; Fukuya, Koji; Kano, Fumihisa; Hasegawa, Akira; Abe, Ken

doi:10.1016/s0022-3115(98)00342-0

Cited by 9 publications

(3 citation statements)

References 5 publications

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“…The effectiveness of low heat input YAG laser repair welding of neutron irradiated materials has been recognised in other reports. 11,12 Petrochemical plants Ferritic steel pressure vessels and tubes in petrochemical plants are protected by stainless steel clad layers, because they are operated under high pressure hydrogen environments at high temperatures .500uC. They are susceptible to hydrogen attack, caused by methane gas generated from the reaction of carbon in the steel with hydrogen that diffuses into the alloy.…”

Section: Neutron Irradiated Stainless Steel and Nickel Based Alloymentioning

confidence: 99%

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Recent developments in repair welding technologies in Japan

Yurioka¹,

Horii²

2006

Science and Technology of Welding and Joining

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Developments in some difficult repair welding technologies in Japan during the past decade are reviewed. The topics covered include the repair welding of bridges in service, the temper bead method which makes it possible to omit post-weld heat treatment (PWHT) of repaired pressure vessels, the seal welding of a reactor vessel in which stress corrosion cracks were detected, low heat input repair welding of neutron irradiated stainless steel and nickel based alloys, the prevention of solidification cracking in repair welding of aged heat resistant cast steels, the development of welding materials for the mending of single crystal nickel based superalloy turbine blades, underwater repair welding of nuclear reactors, the reduction of residual stresses in repair welding, and an ultrasonic testing method for nickel based weld metals. The local PWHT of creep resistant ferritic steel tubes is also reviewed.

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Section: Neutron Irradiated Stainless Steel and Nickel Based Alloymentioning

confidence: 99%

“…The effectiveness of low heat input YAG laser repair welding of neutron irradiated materials has been recognised in other reports. 11,12 Petrochemical plants…”

Section: Neutron Irradiated Stainless Steel and Nickel Based Alloymentioning

confidence: 99%

Recent developments in repair welding technologies in Japan

Yurioka¹,

Horii²

2006

Science and Technology of Welding and Joining

View full text Add to dashboard Cite

show abstract

“…This phenomenon directly results in disastrous heliuminduced cracking on the weld boundary. Laser welding, however, is hypothesized to reduce the helium coalescence and cracking at the weld boundary, due to the reduced heat input that inhibits surface cracking and subsurface defects [3]. Nevertheless, no studies have characterized the laser welded microstructures at resolutions greater than scanning electron microscopy (SEM) level resolution.…”

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confidence: 99%