Effects of pulsed laser surface remelting on microstructure, hardness and lead-bismuth corrosion behavior of a ferrite/martensitic steel
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A typical ferritic/martensitic (F/M) steel sheet was subjected to pulsed laser surface remelting (LSR) andcorrosion test in lead-bismuth eutectic (LBE) at 550 C. There present two modification zones withdistinct microstructures in the LSRed specimen: (1) remelted zone (RZ) consisting of both bulk d-ferritegrains and martensitic plates and (2) heat-affected zone (HAZ) below the RZ, mainly composed ofmartensitic plates and high-density precipitates. Martensitic transformation occurs in both the RZ andthe HAZ with the Kurdjumov-Sachs and Nishiyama-Wassermann orientation relationships followedconcurrently, resulting in scattered orientations and specific misorientation characteristics. Hardnessesof the RZ and the HAZ are 364 ± 7 HV and 451 ± 15 HV, respectively, considerably higher than that of thematrix (267 ± 3 HV). In oxygen-saturated and oxygen-depleted LBE, thicknesses of oxide layers developed on both the as-received and the LSRed specimens increase with prolonging corrosion time (oxidelayers always thinner under the oxygen-depleted condition). The corrosion resistance of the LSRed F/Msteel in oxygen-saturated LBE is improved, which can be attributed to the grain-refinement acceleratedformation of dense FeeCr spinel. In oxygen-depleted LBE, the growth of oxide layers is very low withboth types of specimens showing similar corrosion resistance
Abstract
A typical ferritic/martensitic (F/M) steel sheet was subjected to pulsed laser surface remelting (LSR) andcorrosion test in lead-bismuth eutectic (LBE) at 550 C. There present two modification zones withdistinct microstructures in the LSRed specimen: (1) remelted zone (RZ) consisting of both bulk d-ferritegrains and martensitic plates and (2) heat-affected zone (HAZ) below the RZ, mainly composed ofmartensitic plates and high-density precipitates. Martensitic transformation occurs in both the RZ andthe HAZ with the Kurdjumov-Sachs and Nishiyama-Wassermann orientation relationships followedconcurrently, resulting in scattered orientations and specific misorientation characteristics. Hardnessesof the RZ and the HAZ are 364 ± 7 HV and 451 ± 15 HV, respectively, considerably higher than that of thematrix (267 ± 3 HV). In oxygen-saturated and oxygen-depleted LBE, thicknesses of oxide layers developed on both the as-received and the LSRed specimens increase with prolonging corrosion time (oxidelayers always thinner under the oxygen-depleted condition). The corrosion resistance of the LSRed F/Msteel in oxygen-saturated LBE is improved, which can be attributed to the grain-refinement acceleratedformation of dense FeeCr spinel. In oxygen-depleted LBE, the growth of oxide layers is very low withboth types of specimens showing similar corrosion resistance
참고문헌 (44)
- O. Yeliseyeva, "Influence of temperature on the interaction mode of T91 and AISI 316L steels with PbeBi melt saturated by oxygen", Corrosion Sci, 50, pp.1672~1683 (2008)
- C. Schroer, "Performance of 9%Cr steels in flowing lead-bismuth eutectic at 450 and 550 C, and 106 mass%dissolved oxygen", Nucl. Eng. Des, 280, pp.661~672 (2014)
- X. Gong, "Low cycle fatigue behavior of a modified 9Cre1Mo ferriticemartensitic steel in leadebismuth eutectic at 350C e effects of oxygen concentration in the liquid metal and strain rate", Corrosion Sci, 94, pp.377~391 (2015)
- J. Liu, "Leadebismuth eutectic corrosion behaviors of ferritic", martensitic steels in low oxygen concentration environment, 2015, pp.84, 383~395
- G. Müller, "Results of steel corrosion tests in flowing liquid Pb", Bi at 420-600 C after 2000 h, 2002, pp.301, 40~46
- M. Yurechko, "Steel T91 subjected to static stress in lead-bismuth eutectic at 450-550 C and low oxygen concentration", J. Nucl. Mater, 512, pp.423~439 (2018)
- Y. Chen, "Enhanced creep resistance of Y-bearing 9Cr ferritic", martensitic steel via vacuum casting technique, 2019, pp.8, 4588~4597
- E. Miorin, "Al rich PVD protective coatings : a promising approach to prevent T91 steel corrosion in stagnant liquid lead", Surf. Coating. Technol, 377, pp.124890~ (2019)
- Y. Dai, "FeCrAlY and TiN coatings on T91 steel after irradiation with 72MeV protons in flowing LBE", J. Nucl. Mater, 431, pp.66~76 (2012)
- L. Chai, "Microstructural characterization and hardness variation of pure Ti surface-treated by pulsed laser", J. Alloys Compd, 741, pp.116~122 (2018)
- J. Dai, "Characterization and correlation of microstructure and hardness of Tie6Ale4V sheet surface-treated by pulsed laser", J. Alloys Compd, 826, pp.154243~ (2020)
- L. Chai, "Characterization of microstructure and hardness of a Zr-2. 5Nb alloy surface-treated by pulsed laser", Mater. Chem. Phys, 198, pp.303~309 (2017)
- B. Mahmoudi, "Laser surface hardening of AISI 420 stainless steel treated by pulsed Nd : YAG laser", Mater. Des, 31, pp.2553~2560 (2010)
- G. Telasang, "Wear and corrosion behavior of laser surface engineered AISI H13 hot working tool steel", Surf. Coating. Technol, 261, pp.69~78 (2015)
- M. Moradi, "High power diode laser surface hardening of AISI 4130 : statistical modelling and optimization", Opt Laser. Technol, 111, pp.554~570 (2019)
- X. Gong, "The role of oxide films in preventing liquid metal embrittlement of T91 steel exposed to liquid lead-bismuth eutectic", J. Nucl. Mater, 509, pp.401~407 (2018)
- H. O. Nam, "Dissolved oxygen control and monitoring implementation in the liquid leadebismuth eutectic loop : HELIOS", J. Nucl. Mater, 376, pp.381~385 (2008)
- A. Khorram, "Nd : YAG laser surface hardening of AISI 431 stainless steel : mechanical and metallurgical investigation", Opt Laser. Technol, 119, pp.105617~ (2019)
- 장기남, "The effect of cooling rates on carbide precipitate and microstructure of 9CR-1MO oxide dispersion strengthened(ODS) steel", Nuclear Engineering and Technology, 51(1), pp.249~256 (2019), 한국원자력학회[DOI]
- W. Yan, "Microstructural stability of 9-12%Cr ferrite", martensite heat-resistant steels, 2013, pp.7, 1~27
- F. J. Humphreys, "Review Grain and subgrain characterisation by electron backscatter diffraction", J. Mater. Sci, 36, pp.3833~3854 (2001)
- S. I. Wright, "A review of strain analysis using electron backscatter diffraction", Microsc. Microanal, 17, pp.316~329 (2011)
- M. K. Alam, "Electron Backscatter Diffraction(EBSD)analysis of laser-cladded AISI 420 martensitic stainless steel", Mater. Char, 161, pp.110138~ (2020)
- S. Morito, "The morphology and crystallography of lath martensite in alloy steels", Acta Mater, 54, pp.5323~5331 (2006)
- E. Bouyne, "Use of EBSD technique to examine microstructure and cracking in a bainitic steel", Scripta Mater, 39, pp.295~300 (1998)
- A. Guo, "An analysis of the microstructure of the heat-affected zone of an ultra-low carbon and niobiumbearing acicular ferrite steel using EBSD and its relationship to mechanical properties", Mater. Sci. Eng, 527, pp.6440~6448 (2010)
- G. Nolze, "Irrational orientation relationship derived from rational orientation relationships using EBSD data", Cryst. Res. Technol, 43, pp.61~73 (2008)
- C. C. Kinney, "The microstructure of lath martensite in quenched 9Ni steel", Acta Mater, 69, pp.372~385 (2014)
- T. Karthikeyan, "Grain refinement to improve impact toughness in 9Cre1Mo steel through a double austenitization treatment", J. Nucl. Mater, 419, pp.256~262 (2011)
- J. Zhang, "A review of steel corrosion by liquid lead and leadebismuth", Corrosion Sci, 51, pp.1207~1227 (2009)
- R. L. Klueh, "Ferritic", martensitic steels for next-generation reactors, 2007, pp.371, 37~52
- Z. Ye, "Oxidation mechanism of T91 steel in liquid lead-bismuth eutectic : with consideration of internal oxidation", Sci. Rep, 6, pp.35268~ (2016)
- X. Zhou, "Phase transformation behavior and microstructural control of high-Cr martensitic", ferritic heat-resistant steels for power and nuclear plants : a review, 2015, pp.31, 235~242
- Z. C. Cordero, "Six decades of the HallePetch effect e a survey of grain-size strengthening studies on pure metals", Int. Mater. Rev, 61, pp.495~512 (2016)
- Y. Li, "Mechanical properties and microstructures of China low activation martensitic steel compared with JLF-1", J. Nucl. Mater, 367-370, pp.117~121 (2007)
- X. Wu, "Heterogeneous materials : a new class of materials with unprecedented mechanical properties", Mater. Res. Lett, 5, pp.527~532 (2017)
- M. G. Jiang, "Strong and ductile reduced activation ferritic", martensitic steel additively manufactured by selective laser melting, 2019, pp.7, 426~432
- J. Xiao, "A refined oxidation mechanism proposed for ferritic-martensitic steels exposed to oxygen-saturated liquid lead-bismuth eutectic at 400C for 500 h", J. Nucl. Mater, 549, pp.152852~ (2021)
- L. Martinelli, "Oxidation mechanism of a Fe-9Cr-1Mo steel by liquid PbeBi eutectic alloy(Part III)", Corrosion Sci, 50, pp.2549~2559 (2008)
- A. L. Johnson, "Spectroscopic and microscopic investigation of the corrosion of 316", 316L stainless steel by leadebismuth eutectic(LBE)at elevated temperatures : importance of surface preparation, 2004, pp.328, 88~96
- Q. Shi, "Oxidation behavior of ferritic", martensitic steels in stagnant liquid LBE saturated by oxygen at 600 C, 2015, pp.457, 135~141
- G. Müller, "Investigation on oxygen controlled liquid lead corrosion of surface treated steels", J. Nucl. Mater, 278, pp.85~95 (2000)
- V. Tsisar, "Characterization of corrosion phenomena and kinetics on T91 ferritic", martensitic steel exposed at 450 and 550 C to flowing Pb-Bi eutectic with 10"7 mass% dissolved oxygen, 2017, pp.494, 422~438
- V. Tsisar, "Corrosion interaction of 9%Cr ferritic", martensitic steels at 450 and 550CWith flowing Pb eBiEutectic containing 107 mass % dissolved oxygen, 2019, pp.5, ~
