On the bimodal grain growth in zirconium grade 702 alloy

Rodríguez, NL; Dickinson, T. J.; Nguyen, Duy‐Liem; Park, E.; Foyos, J.; Sutherlin, Richard C.; Sparkowich, S.; Hogue, Frauke; Stoyanov, Pantcho; Ogren, J.; Plotkin, Edward S.; Es‐Said, O.S.

doi:10.1016/j.engfailanal.2007.05.004

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…So the joints should be shielded strictly during the welding process. Besides, the grains of fusion zone and heat-affected zone would tend to coarsen because of the poor thermal conductivity(0.167 W/(cm· ℃ ) of zirconium alloy which is detrimental to the performance of the joints [6] .…”

Section: A N U S C R I P Tmentioning

confidence: 99%

Microstructure and corrosion behavior of Zr-702 joined by electron beam welding

Zhang

Wang

et al. 2015

Vacuum

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Section: A N U S C R I P Tmentioning

confidence: 99%

Microstructure and corrosion behavior of Zr-702 joined by electron beam welding

Zhang

Wang

et al. 2015

Vacuum

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“…Additionally, the metallurgical transformation is facile to occur in the heat-affected zones, resulting in the formation of intermetallic compounds and the reduced performance of joints [16,18]. The EBW [12] and TIG [15] methods are successfully employed to weld Zr-4 alloy and stainless steel, but the molten and heat-affected zones have an irreversible negative impact on the mechanical performance of the internal fuel core [19]. In the integrated manufacturing of new fuel elements with multi-layer densely joined structures [20][21][22], the spacing between welding joints is small and the welding joints are overlapped and influence each other.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Vacuum Diffusion Bonded Zr-4 Alloy Joint

et al. 2021

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The development of welding technology for zirconium alloy has great significance on the safety, stability, and reliability of the operation of the nuclear reactor. In this work, vacuum diffusion bonding of Zr-4 alloy was studied at the diffusion temperature ranging from 760 to 820 °C with holding times of 30–90 min. The effects of diffusion bonding temperature and holding time on the interfacial microstructure and mechanical properties of the diffusion bonded Zr-4 alloy joints were investigated in detail, and the relationship between the interfacial microstructure and shear strength of the diffusion bonded joints was discussed. The results show that the interface bonding ratio of the diffusion bonded Zr-4 joint gradually increased from 74% to 95% with the increasing of bonding temperature. In addition, the grain size of the base material became a larger and brittle second phase composed of Zr(Cr, Fe)2 and eutectic α-Zr + Zr(Fe, Cr)2 formed in the joint with the increase of the temperature as well as the extension of the bonding time. The highest shear strength of 349 MPa was obtained at 800 °C for 30 min under 7 MPa, and the crack of the joint was primarily propagated along with the base material rather than the bonded interface.

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