Study of oxidation behavior and tensile properties of candidate superalloys in the air ingress simulation scenario
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Air ingress incidents are major safety accidents in very-high-temperature reactors (VHTRs). Air containing a high volume fraction of oxygen may cause severe oxidation of core components at the VHTR, especially for the significantly thin alloy tube wall in the intermediate heat exchanger (IHE). The research objects of this study are Inconel 617 and Incoloy 800H, two candidate alloys for IHE in VHTR. The air ingress accident scenario is simulated with high-temperature air flow at 950 C. A continuous oxide scale was formed on the surfaces of both the alloys after the experiment. Because the oxide scale of Inconel 617 has a loose structure, whereas that of Incoloy 800H is denser, Inconel 617 exhibited significantly more severe internal oxidation than Incoloy 800H. Further, Inconel 617 showed a significant decrease in ultimate tensile strength and plasticity after aging for 200 h, whereas Incoloy 800H maintained its tensile properties satisfactorily. Through control experiment under vacuum, we preliminarily concluded that serious internal oxidation is the primary reason for the decline in the tensile properties of Inconel 617
Abstract
Air ingress incidents are major safety accidents in very-high-temperature reactors (VHTRs). Air containing a high volume fraction of oxygen may cause severe oxidation of core components at the VHTR, especially for the significantly thin alloy tube wall in the intermediate heat exchanger (IHE). The research objects of this study are Inconel 617 and Incoloy 800H, two candidate alloys for IHE in VHTR. The air ingress accident scenario is simulated with high-temperature air flow at 950 C. A continuous oxide scale was formed on the surfaces of both the alloys after the experiment. Because the oxide scale of Inconel 617 has a loose structure, whereas that of Incoloy 800H is denser, Inconel 617 exhibited significantly more severe internal oxidation than Incoloy 800H. Further, Inconel 617 showed a significant decrease in ultimate tensile strength and plasticity after aging for 200 h, whereas Incoloy 800H maintained its tensile properties satisfactorily. Through control experiment under vacuum, we preliminarily concluded that serious internal oxidation is the primary reason for the decline in the tensile properties of Inconel 617
참고문헌 (30)
- Declan Butler, "Nuclear power's new dawn", Nature, 429(6989), pp.238~240 (2004), Springer Science and Business Media LLC[DOI]
- Zuoyi Zhang, "Economic potential of modular reactor nuclear power plants based on the Chinese HTR-PM project", Nuclear Engineering and Design, 237(23), pp.2265~2274 (2007), Elsevier BV[DOI]
- Apoorva V. Rudra, "Experimental Investigation of Natural Circulation During Air-Ingress Scenario in a Very High Temperature Reactor", Nuclear Science and Engineering, 193(10), pp.1147~1159 (2019), Informa UK Limited[DOI]
- Salman M. Alshehri, "A review and safety aspects of modular<scp>high‐temperature gas‐cooled<", scp>reactors, 2020, pp.45(8), 11479~11492[DOI]
- Jae Soon Kim, "Experimental study on fundamental phenomena in HTGR small break air-ingress accident", Annals of Nuclear Energy, 87, pp.145~156 (2016), Elsevier BV[DOI]
- Eung Soo Kim, "Estimation of graphite density and mechanical strength variation of VHTR during air-ingress accident", Nuclear Engineering and Design, 238(4), pp.837~847 (2008), Elsevier BV[DOI]
- J. D. Whittenberger, "Effect of Long-Term 1093 K Exposure to Air or Vacuum on the Structure of Several Wrought Superalloys", Journal of Materials Engineering and Performance, 2(5), pp.745~758 (1993), Springer Science and Business Media LLC[DOI]
- 조태선, "Thermal Degradation Behavior of Inconel 617 Alloy", Metals and Materials International, 14(6), pp.739~743 (2008), 대한금속·재료학회
- Changheui Jang, "Oxidation behaviour of an Alloy 617 in very high-temperature air and helium environments", International Journal of Pressure Vessels and Piping, 85(6), pp.368~377 (2008), Elsevier BV[DOI]
- Daejong Kim, "Oxidation Characteristics and Oxide Layer Evolution of Alloy 617 and Haynes 230 at 900 °C and 1100 °C", Oxidation of Metals, 71(5-6), pp.271~293 (2009), Springer Science and Business Media LLC[DOI]
- Gyeong-Geun Lee, "Microstructural Investigation of Alloy 617 Creep-ruptured at High Temperature in a Helium Environment", Journal of Materials Science & Technology, 29(12), pp.1177~1183 (2013), Elsevier BV[DOI]
- Willem Joseph Quadakkers, "Corrosion of high temprature alloys in the primary circuit helium of high temperature gas cooled reactors. – Part I: Theoretical background", Materials and Corrosion, 36(4), pp.141~150 (1985), Wiley[DOI]
- P.S. Shankar, "Effect of trace impurities in helium on the creep behavior of Alloy 617 for very high temperature reactor applications", Journal of Nuclear Materials, 366(1-2), pp.28~36 (2007), Elsevier BV[DOI]
- F. Rouillard, "High temperature corrosion of a nickel base alloy by helium impurities", Journal of Nuclear Materials, 362(2-3), pp.248~252 (2007), Elsevier BV[DOI]
- J. Chapovaloff, "Assessing the kinetics of high temperature oxidation of Inconel 617 in a dedicated HTR impure helium facility coupling thermogravimetry and gas phase chromatography", Journal of Nuclear Materials, 441(1-3), pp.293~300 (2013), Elsevier BV[DOI]
- P. Yvon, "Overview of Reactor Systems and Operational Environments for Structural Materials in Gen-IV Fission Reactors" (2019)
- A.U. Seybolt, "Oxidation of metals", Advances in Physics, 12(45), pp.1~43 (1963), Informa UK Limited[DOI]
- D. Saber, "High temperature cyclic oxidation of Ni based superalloys at different temperatures in air", Journal of Alloys and Compounds, 719, pp.133~141 (2017), Elsevier BV[DOI]
- C. J. Tsai, "High Temperature Oxidation Behavior of Nickel and Iron Based Superalloys in Helium Containing Trace Impurities", CORROSION SCIENCE AND TECHNOLOGY, 18(1), pp.8~15 (2019), 한국부식방식학회[DOI]
- Deepak Kumar, "High-Temperature Oxidation of Alloy 617 in Helium Containing Part-Per-Million Levels of CO and CO2 as Impurities", Metallurgical and Materials Transactions A, 42(5), pp.1245~1265 (2011), Springer Science and Business Media LLC[DOI]
- L.W. Graham, "Corrosion of metallic materials in HTR-helium environments", Journal of Nuclear Materials, 171(1), pp.76~83 (1990), Elsevier BV[DOI]
- Taichi Abe, "Computational phase diagrams for the Nd-based magnets based on the combined ab initio", CALPHAD approach, 2018, pp.154, 305~310[DOI]
- "Journal of The Electrochemical Society", 1961, 1146~, pp.The Electrochemical Society, https:
- J. Guo, "Materials Science and Engineering for superalloys" (2010)
- Zhen Yang, "Oxidation behavior of a new wrought Ni-30Fe-20Cr based alloy at 750 °C in pure steam and the effects of alloyed yttrium", Corrosion Science, 125, pp.106~113 (2017), Elsevier BV[DOI]
- Danhong Li, "High temperature oxidation behavior of Ni-based superalloy Nimonic95 and the effect of pre-oxidation treatment", Vacuum, 194, pp.110582~ (2021), Elsevier BV[DOI]
- M.W. Chase, "NIST-JANAF Thermochemical Tables" (1998)
- Daejong Kim, "Effects of aging in high temperature helium environments on room temperature tensile properties of nickel-base superalloys", Materials Science and Engineering: A, 528(3), pp.1713~1720 (2011), Elsevier BV[DOI]
- Daejong Kim, "Effects of high temperature aging in an impure helium environment on low temperature embrittlement of Alloy 617 and Haynes 230", Journal of Nuclear Materials, 405(1), pp.9~16 (2010), Elsevier BV[DOI]
- Tsung-Kuang Yeh, "Corrosion of Alloy 617 in high-temperature gas environments", Nuclear Engineering and Design, 271, pp.257~261 (2014), Elsevier BV[DOI]