F316 오스테나이트 스테인리스강의 상변태 및 입계부식저항성에 미치는 입열의 영향
Effects of Heat Inputs on Phase Transformation and Resistance to Intergranular Corrosion of F316 Austenitic Stainless Steel
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초록
To elucidate the effect of heat inputs on phase transformation and resistance to intergranular corrosion of F316austenitic stainless steel (ASS), thermodynamic calculations of each phase and time-temperature-transformationdiagram were conducted using JMaPro simulation software, oxalic acid etch test, double-loop electrochemicalpotentiokinetic reactivation test (DL-EPR), field emission scanning electron microscopy with energy dispersivespectroscopy, and transmission electron microscopy analyses of Cr carbide (Cr23C6), austenite phase andferrite phase. F316 ASS containing a relatively low C content of 0.043 wt% showed a slightly sensitizedmicrostructure (acceptably dual structure) due to a small amount of Cr carbide precipitated at heat affectedzone irrespective of heat inputs. Based on results of DL-EPR test, although heat input was increased, theratio of Ir to Ia was only increased very slightly due to a slight sensitization. Therefore, heat inputs havelittle influences on resistance to intergranular corrosion of F316 austenitic stainless steel containing 0.043wt% C.
Abstract
To elucidate the effect of heat inputs on phase transformation and resistance to intergranular corrosion of F316austenitic stainless steel (ASS), thermodynamic calculations of each phase and time-temperature-transformationdiagram were conducted using JMaPro simulation software, oxalic acid etch test, double-loop electrochemicalpotentiokinetic reactivation test (DL-EPR), field emission scanning electron microscopy with energy dispersivespectroscopy, and transmission electron microscopy analyses of Cr carbide (Cr23C6), austenite phase andferrite phase. F316 ASS containing a relatively low C content of 0.043 wt% showed a slightly sensitizedmicrostructure (acceptably dual structure) due to a small amount of Cr carbide precipitated at heat affectedzone irrespective of heat inputs. Based on results of DL-EPR test, although heat input was increased, theratio of Ir to Ia was only increased very slightly due to a slight sensitization. Therefore, heat inputs havelittle influences on resistance to intergranular corrosion of F316 austenitic stainless steel containing 0.043wt% C.
참고문헌 (19)
- V. Moura, "Influence of stabilization heat treatments on microstructure, hardness and intergranular corrosion resistance of the AISI 321 stainless steel", Journal of Materials Science, 43(2), pp.536~540 (2008), Springer Science and Business Media LLC[DOI]
- Sen Yang, "Grain boundary engineering of 304 austenitic stainless steel by laser surface melting and annealing", Journal of Materials Science, 42(3), pp.847~853 (2007), Springer Science and Business Media LLC[DOI]
- S. M. Bruemmer, "Influence of Chromium Depletion on Intergranular Stress Corrosion Cracking of 304 Stainless Steel", CORROSION, 48(1), pp.42~49 (1992), NACE International[DOI]
- M.H Lewis, "Precipitation of M23C6 in austenitic steels", Acta Metallurgica, 13(11), pp.1159~1168 (1965), Elsevier BV[DOI]
- Raghuvir Singh, "The importance of grain size relative to grain boundary character on the sensitization of metastable austenitic stainless steel", Scripta Materialia, 57(3), pp.185~188 (2007), Elsevier BV[DOI]
- G.H. Aydoğdu, "Determination of susceptibility to intergranular corrosion and electrochemical reactivation behaviour of AISI 316L type stainless steel", Corrosion Science, 48(11), pp.3565~3583 (2006), Elsevier BV[DOI]
- D.N Wasnik, "Resistance to sensitization and intergranular corrosion through extreme randomization of grain boundaries", Acta Materialia, 50(18), pp.4587~4601 (2002), Elsevier BV[DOI]
- Y. Ustinovshikov, "Microstructure and properties of the high-nitrogen Fe–Cr austenite", Materials Science and Engineering: A, 262(1-2), pp.82~87 (1999), Elsevier BV[DOI]
- F.R Beckitt, "The shape and mechanism of formation of M23C6 carbide in austenite", Acta Metallurgica, 15(1), pp.113~129 (1967), Elsevier BV[DOI]
- L.K Singhal, "The growth of M23C6 carbide on incoherent twin boundaries in austenite", Acta Metallurgica, 15(10), pp.1603~1610 (1967), Elsevier BV[DOI]
- P. R. Howell, "The crystallography of the austenite-ferrite", carbide transformation in Fe−Cr−C alloys, 1979, pp.10(9), 1213~1222[DOI]
- R. A. Ricks, "The effect of Ni on the decomposition of austenite in Fe-Cu alloys", Metallurgical Transactions A, 10(8), pp.1049~1058 (1979), Springer Science and Business Media LLC[DOI]
- T. Thorvaldsson, "Grain boundary Cr-depleted zones in Ti and Nb stabilized austenitic stainless steels", Journal of Materials Science, 18(3), pp.793~803 (1983), Springer Science and Business Media LLC[DOI]
- H.U. Hong, "Correlation of the M23C6 precipitation morphology with grain boundary characteristics in austenitic stainless steel", Materials Science and Engineering: A, 318(1-2), pp.285~292 (2001), Elsevier BV[DOI]
- G.S. Was, "A thermodynamic and kinetic basis for understanding chromium depletion in Ni-Cr-Fe alloys", Acta Metallurgica, 33(5), pp.841~854 (1985), Elsevier BV[DOI]
- 오은종, "304 스테인리스강 용접 열영향부의 입계 부식에 미치는 탄소함량의 영향", 대한용접접합학회지, 37(4), pp.322~332 (2019), 대한용접접합학회[DOI]
- "ASTM A262, Practice A, Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels-Oxalic Acid Etch Test for Classification of Etch Structures of Austenitic Stainless Steels", ~ (2001)
- "ISO 12732, Corrosion of Metals and Alloys-Electrochemical Potentiokinetic Reactivation Measurement using the Double Loop Method (Based on Čihal's Method)", ~ (2006)
- 정병호, "316 스테인리스강의 입계부식에 미치는 열사이클과응력의 영향", 한국마린엔지니어링학회지, 30(6), pp.709~715 (2006), 한국마린엔지니어링학회