Microstructure analysis of pressure resistance seal welding joint of zirconium alloy tube-plug structure
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Pressure resistance welding is usually used to seal the connection between the cladding tube and the end plug made of zirconium alloy. The seal welded joint has a direct effect on the service performance of the fuel rod cladding structure. In this paper, the pressure resistance welded joints of zirconium alloy tube-plug structure were obtained by thermal-mechanical simulation experiments. The microstructure and microhardness of the joints were both analyzed. The effect of processing parameters on the microstructure was studied in detail. The results showed that there was no β-Zr phase observed in the joint, and no obvious element segregation. There were different types of Widmanst¨atten structure in the thermo-mechanically affected zone (TMAZ) and heat affected zone (HAZ) of the cladding tube and the end plug joint because of the low cooling rate. Some part of the grains in the joint grew up due to overheating. Its size was about 2.8 times that of the base metal grains. Due to the high dislocation density and texture evolution, the microhardnesses of TMAZ and HAZ were both significantly higher than that of the base metal, and the microhardness of the TMAZ was the highest. With the increasing of welding temperature, the proportion of recrystallization in TMAZ decreased, which was caused by the increasing of strain rate and dislocation annihilation
Abstract
Pressure resistance welding is usually used to seal the connection between the cladding tube and the end plug made of zirconium alloy. The seal welded joint has a direct effect on the service performance of the fuel rod cladding structure. In this paper, the pressure resistance welded joints of zirconium alloy tube-plug structure were obtained by thermal-mechanical simulation experiments. The microstructure and microhardness of the joints were both analyzed. The effect of processing parameters on the microstructure was studied in detail. The results showed that there was no β-Zr phase observed in the joint, and no obvious element segregation. There were different types of Widmanst¨atten structure in the thermo-mechanically affected zone (TMAZ) and heat affected zone (HAZ) of the cladding tube and the end plug joint because of the low cooling rate. Some part of the grains in the joint grew up due to overheating. Its size was about 2.8 times that of the base metal grains. Due to the high dislocation density and texture evolution, the microhardnesses of TMAZ and HAZ were both significantly higher than that of the base metal, and the microhardness of the TMAZ was the highest. With the increasing of welding temperature, the proportion of recrystallization in TMAZ decreased, which was caused by the increasing of strain rate and dislocation annihilation
참고문헌 (24)
- Mikhail Slobodyan, "Resistance, electron- and laser-beam welding of zirconium alloys for nuclear applications: A review", Nuclear Engineering and Technology, 53(4), pp.1049~1078 (2021), 한국원자력학회[DOI]
- J. Gan, "Laser and Pressure Resistance Weld of Thin-Wall Cladding for LWR Accident-Tolerant Fuels", JOM, 70(2), pp.192~197 (2017), Springer Science and Business Media LLC[DOI]
- 송건우, "PROGRESS IN NUCLEAR FUEL TECHNOLOGY IN KOREA", Nuclear Engineering and Technology, 41(4), pp.493~520 (2009), 한국원자력학회
- N. Boutarek, "Microstructure change in the interface of co2 laser welded zirconium alloys", Physics Procedia, 2(3), pp.1159~1165 (2009), Elsevier BV[DOI]
- 김수성, "핵연료 피복재 Zr합금에 적용되는 용접기술", 대한용접접합학회지, 29(1), pp.5~8 (2011), 대한용접접합학회
- Olivier Doyen, "Ferritic and martensitic ODS steel resistance upset welding of fuel claddings: Weldability assessment and metallurgical effects", Journal of Nuclear Materials, 518, pp.326~333 (2019), Elsevier BV[DOI]
- N.D. Jerred, "Pressure resistance welding of MA-957 to HT-9 for advanced reactor applications", Journal of Nuclear Materials, 508, pp.265~277 (2018), Elsevier BV[DOI]
- Zu Wei Lin, "Numerical Simulation of Residual Stress and Deformation of Special Resistance Welding of Nuclear Power Zirconium Tube", Advanced Materials Research, 154-155, pp.304~309 (2010), Trans Tech Publications, Ltd.[DOI]
- R. A. Bordoni, "Microstructure in the weld region in seam welded and resistance welded Zircaloy 4 tubing", Journal of Materials Science, 16(6), pp.1527~1532 (1981), Springer Science and Business Media LLC[DOI]
- Guilherme Pennachin Sakamiti, "Weldability of a zirconium alloy comparing resistance and pulsed laser methods", Nuclear Materials and Energy, 20, pp.100693~ (2019), Elsevier BV[DOI]
- Tae-Hyung Na, "A study on characteristics of end plug resistance welding process in nuclear fuel rods by experiment and numerical simulation", The International Journal of Advanced Manufacturing Technology, 98(9-12), pp.2241~2255 (2018), Springer Science and Business Media LLC[DOI]
- Jong-Youl Park, "Effect of applied current on the formation of defect in PWR nuclear fuel rods in resistance pressure welding process", Journal of Nuclear Science and Technology, 52(5), pp.748~757 (2014), Informa UK Limited[DOI]
- Y. Ben Ammar, "Influence of the cooling rate on the texture and the microstructure of Zircaloy-4 studied by means of a Jominy end-quench test", Materials Science and Engineering: A, 556, pp.184~193 (2012), Elsevier BV[DOI]
- Qingshan Dong, "Study of microstructure and precipitates of a Zr-2.5Nb-0.5Cu CANDU spacer material", Journal of Nuclear Materials, 481, pp.153~163 (2016), Elsevier BV[DOI]
- J. Romero, "Capturing the texture changes in a zirconium alloy during the allotropic phase transformation", Scripta Materialia, 61(4), pp.399~402 (2009), Elsevier BV[DOI]
- Gang Feng, "Numerical modeling of pressure resistance welding of zirconium alloy tube-end plug joint", The International Journal of Advanced Manufacturing Technology, 121(5-6), pp.3337~3350 (2022), Springer Science and Business Media LLC[DOI]
- B. F. Luan, "Effect of cooling rates and impurities on the microstructure of β→α transformation in Zr alloys", Rare. Metal. Mater. Eng, 42(12), pp.2636~2640 (2013)
- Ji-Woon Lee, "Continuous dynamic recrystallization behavior and kinetics of Al–Mg–Si alloy modified with CaO-added Mg", Materials Science and Engineering: A, 673, pp.648~659 (2016), Elsevier BV[DOI]
- Ali Abd El-Aty, "Computational homogenization of tensile deformation behaviors of a third generation Al-Li alloy 2060-T8 using crystal plasticity finite element method", Materials Science and Engineering: A, 731, pp.583~594 (2018), Elsevier BV[DOI]
- Abdollah Saboori, "Hot deformation behavior of Zr-1%Nb alloy: Flow curve analysis and microstructure observations", Materials Science and Engineering: A, 696, pp.366~373 (2017), Elsevier BV[DOI]
- Yan-Hong Xiao, "Constitutive modeling of hot deformation behavior of H62 brass", Materials Science and Engineering: A, 528(21), pp.6510~6518 (2011), Elsevier BV[DOI]
- W. Wei, "A new constitutive equation for strain hardening and softening of fcc metals during severe plastic deformation", Acta Materialia, 56(17), pp.4771~4779 (2008), Elsevier BV[DOI]
- Pengfei Yu, "Analysis and characterization of dynamic recrystallization and grain structure evolution in friction stir welding of aluminum plates", Acta Materialia, 207, pp.116692~ (2021), Elsevier BV[DOI]
- R Logé, "Sensitivity of α-Zy4 high-temperature deformation textures to the β-quenched precipitate structure and to recrystallization: application to hot extrusion", Acta Materialia, 48(15), pp.3917~3930 (2000), Elsevier BV[DOI]