TIG and HIP joining of Reduced Activation Ferrite/Martensitic steel for the Korean ITER–TBM

Ku, Duck Young; Oh, Sangjun; Ahn, Min Cheol; Yu, In-Keun; Kim, Duck-Hoi; Cho, Seungyon; Choi, Im-Sub; Kwon, Ki-Bum

doi:10.1016/j.jnucmat.2010.12.169

Cited by 17 publications

(6 citation statements)

References 10 publications

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“…A number of techniques have been utilized for bonding RAFM, such as electron beam welding, friction welding, diffusion bonding [6][7] , etc. However, it is possible that the controlled microstructure of the RAFM materials is lost near the bonding interface, inducing degradation of toughness in welded joint 8) . Reheating treatment, which can recover the microstructure of RAFM, is, however, difficult to apply to the all blanket components after fabrication.…”

Section: Introductionmentioning

confidence: 99%

Transformation super plasticity deformation of reduced activation ferritic/martensitic steel

Noto

Hishinuma

Muroga

2019

Fusion Engineering and Design

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Section: Introductionmentioning

confidence: 99%

Transformation super plasticity deformation of reduced activation ferritic/martensitic steel

Noto

Hishinuma

Muroga

2019

Fusion Engineering and Design

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“…The welding techniques are critical to the practical application of 9Cr martensitic/ferritic heat-resistant steel in nuclear reactors. In order to join this steel to the same steel or other materials, a variety of fusion welding technologies have been employed, including electron beam (EB) welding [7,8], laser welding [8], hybrid welding [8,9], and tungsten inert gas (TIG) welding [10,11]. Fusion welding will change the microstructure of the matrix adjacent to the weld bead.…”

Section: Introductionmentioning

confidence: 99%

Diffusion Bonding of 9Cr Martensitic/Ferritic Heat-Resistant Steels with an Electrodeposited Ni Interlayer

Gao

Wang

Liu

et al. 2018

Metals

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In this paper, diffusion bonding was adopted to join 9Cr martensitic/ferritic heat-resistant steels using an electrodeposited Ni interlayer with a thickness of 40 μm. In addition, the effect of tempering treatment after diffusion bonding on the microstructure evolution and mechanical properties of the bonding joints was investigated. It was found that a transition region with face-centered cubic (FCC) structure was formed between the steel and Ni interlayer. The transition region was the solid solution of (γFe,Ni) rich in Ni component, being related to martensite in the base metal by the Kurdjumov–Sachs (K-S) orientation relationship. No intermetallic compounds were detected at the bonding joints before and after tempering treatment. After tempering treatment, the transition region had higher dislocation density than other regions, due to the higher pinning effect of solute atoms acting on the dislocation than that of the matrix. Tensile tests indicated that tempering treatment improved the mechanical properties of the joint, since the samples after tempering treatment fractured in the base metal, whereas the specimens without tempering treatment fractured at the joint interface.

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“…This allows the shallow land burial of reactor components after their service life times are exhausted. The fabrication of this steel for fusion reactor is primarily by welding [13,14], and hence A-TIG welding of RAFM steel can be considered as an emerging field for study. However limited literatures are available on A-TIG welding of RAFM steels.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Effects of Carrier Solvent and Oxide Fluxes in Activated TIG Welding of Reduced Activation Ferritic/Martensitic Steel

2016

IJAMAE

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Abstract-This work attempts to investigate the effect of oxide fluxes on 6mm thick Reduced Activation ferritic/martensitic steels (RAFM) during Activated TIG (A-TIG) welding. Six different fluxes Al 2 O 3 , Co 3 O 4 , CuO, HgO, MoO 3 , and NiO were mixed with methanol for conversion into paste and bead-on-plate experiments were then carried out. This study, systematically investigates the influence of oxide-based flux powder and carrier solvent composition on the weld bead shape, geometric shape of weld bead and dominant depth enhancing mechanism in tungsten inert gas (TIG) welding of reduced activation ferritic/martensitic (RAFM) steel. It was inferred from the study that flux Co 3 O 4 and MoO 3 imparted full and secure (more than 6mm) penetration with methanol owing to dual mechanism of reversed Marangoni and arc constriction. The use of methanol imparted good spreadabilty and coverability and ultimately higher peak temperatures were observed with its use owing to stronger depth enhancing mechanisms than use of acetone with same oxide fluxes and welding conditions.

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TIG and HIP joining of Reduced Activation Ferrite/Martensitic steel for the Korean ITER–TBM

Cited by 17 publications

References 10 publications

Transformation super plasticity deformation of reduced activation ferritic/martensitic steel

Transformation super plasticity deformation of reduced activation ferritic/martensitic steel

Diffusion Bonding of 9Cr Martensitic/Ferritic Heat-Resistant Steels with an Electrodeposited Ni Interlayer

Experimental Investigation on Effects of Carrier Solvent and Oxide Fluxes in Activated TIG Welding of Reduced Activation Ferritic/Martensitic Steel

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