Fiber laser welding characteristics of commercially pure zirconium (R60702) and structure-mechanics-corrosion performances of the joint

Yang, Jun; Zhang, Linjie; Ning, Jie; Bai, Qing-Lin; Pei, Jun-Yu; Liu, Jiang-Zhe; Lu, Guang-Feng; Zhang, Jianxun

doi:10.1016/j.ijrmhm.2018.01.023

International Journal of Refractory Metals and Hard Materials

2018

DOI: 10.1016/j.ijrmhm.2018.01.023

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Fiber laser welding characteristics of commercially pure zirconium (R60702) and structure-mechanics-corrosion performances of the joint

Jun Yang

Linjie Zhang

Jie Ning

et al.

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Cited by 18 publications

References 24 publications

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Weld Growth Mechanism, Microstructure, and Mechanical Properties of Resistance‐Spot‐Welded Joint of R60702 Zirconium‐Alloy Triple Sheets

Li,

Yang,

et al. 2024

Adv Eng Mater

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Triple sheets of R60702 zirconium (Zr) alloy were joined together using the resistance spot welding (RSW) process in this study. The nugget formation mechanism and microstructure of the weld joint in three equal‐thickness sheets of R60702 Zr alloy were studied. The results revealed that the initial nugget formed at the top of the intermediate sheet, and subsequently expanded both radially and axially until a complete nugget was formed. The fusion zone (FZ) exhibited a martensitic microstructure, while the heat affected zone (HAZ) consisted of two regions: coarse grain heat‐affected zone (CGHAZ) and fine grain heat‐affected zone (FGHAZ). The hardness in the FZ was higher than that of the HAZ and the base metal (BM). Furthermore, the tensile shear force and fracture mode of the weld nuggets were also studied. The weld joints exhibited a maximum tensile‐shear load of 5.7 kN under the following welding parameters: welding current of 14 kA, welding time of 150 ms, and welding force of 3.6 kN. Three failure modes were identified interface fracture (IF), partial button fracture (PBF), and button fracture (BF).This article is protected by copyright. All rights reserved.

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Weld Growth Mechanism, Microstructure, and Mechanical Properties of Resistance‐Spot‐Welded Joint of R60702 Zirconium‐Alloy Triple Sheets

Li,

Yang,

et al. 2024

Adv Eng Mater

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Insight into the pitting corrosion behavior of laser‐welded R60702 zirconium alloy in chloride electrolyte

Ren,

Wang,

et al. 2024

Materials & Corrosion

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This work aims to analyze the passivation and pitting corrosion behaviors of laser beam welded R60702 zirconium alloy in neutral and acidic chloride‐containing electrolytes. Potentiodynamic polarization and electrochemical impedance spectroscopy measurements are carried out to investigate the electrochemical performance of the welding joint. Scanning electron microscope, X‐ray diffraction, and three‐dimensional profile digital microscope are utilized to reveal the microstructures and corrosion morphologies. The electrochemical results show that the heat‐affected zone (HAZ) and weld zone have nearly equal corrosion performance, and both of them are more corrosion‐resistant than the base metal. The corrosion morphologies suggest that the HAZ has the lowest sensitivity to pitting corrosion. Moreover, it is unraveled that, in chloride‐containing electrolytes, the quantity and distribution of Zr(Fe,Cr)2 particle phases are the main factors that determine the different corrosion performances of the welding joint.

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Recent Advances in Joining of Zirconium and Zirconium Alloy for Nuclear Industry

Jiang,

Bian,

Song

et al. 2024

Met. Mater. Int.

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Fiber laser welding characteristics of commercially pure zirconium (R60702) and structure-mechanics-corrosion performances of the joint

Cited by 18 publications

References 24 publications

Weld Growth Mechanism, Microstructure, and Mechanical Properties of Resistance‐Spot‐Welded Joint of R60702 Zirconium‐Alloy Triple Sheets

Weld Growth Mechanism, Microstructure, and Mechanical Properties of Resistance‐Spot‐Welded Joint of R60702 Zirconium‐Alloy Triple Sheets

Insight into the pitting corrosion behavior of laser‐welded R60702 zirconium alloy in chloride electrolyte

Recent Advances in Joining of Zirconium and Zirconium Alloy for Nuclear Industry

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