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Influence of Microstructures on Polarization Resistance and Hydrogen-Induced Cracking of a Micro-Alloyed Steel Submitted to Different Cooling Rates

Influence of Microstructures on Polarization Resistance and Hydrogen-Induced Cracking of a Micro-Alloyed Steel Submitted to Different Cooling Rates
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摘要 The effect of different microstructures on the polarization resistance (Rp) and the hydrogen-induced cracking (HIC) of a micro-alloyed steel austenitized and submitted to different cooling rates was studied.Samples 19.1 x 6 x 2 mm,containing the whole thickness of the plate were extracted from a 20 mm plate and heat treated on a quenching dilatometer,were submitted to Rp and HIC corrosion tests.Both Rp and HIC tests followed as close as possible ASTM G59 and NACE standard TM0284-2003,in this case,modified only with regard to the size of the samples.Steel samples transformed from austenite by a slow cooling (cooling rate of 0.5℃.s-1) showed higher susceptibility to hydrogen-induced cracking,with large cracks in the middle of the sample propagating along segregation bands,corresponding to the centerline of the plate thickness.For cooling rates of 10℃.s-1,only small cracks were found in the matrix and micro cracks nucleated at non-metallic inclusions.For higher cooling rates (40℃.s-1) very few small cracks were detected,linked to non-metallic inclusions.This result suggests that structures formed by polygonal structures and segregation bands (were eutectoid microconstituents predominate) have higher susceptibility to HIC.Structures predominantly formed by acicular ferrite make it difficult to propagate the cracks among non-oriented and interlaced acicular ferrite crystals.Smaller segregation bands containing eutectoid products also help inhibit cracking and crack propagation;segregation bands can function as pipelines for hydrogen diffusion and offer a path of stress concentration for the propagation of cracks,frequently associated to non-metallic inclusions.Polarization resistance essays performed on the steel in theas received condition,prior to any heat treatment,showed larger differences between the regions of the plate,with a considerably lower Rp in the centerline.The austenitization heat treatments followed by cooling rates of 0.5 e 10℃.s-1 made more uniform the corrosion resistance along the thicknes The effect of different microstructures on the polarization resistance (Rp) and the hydrogen-induced cracking (HIC) of a micro-alloyed steel austenitized and submitted to different cooling rates was studied.Samples 19.1 x 6 x 2 mm,containing the whole thickness of the plate were extracted from a 20 mm plate and heat treated on a quenching dilatometer,were submitted to Rp and HIC corrosion tests.Both Rp and HIC tests followed as close as possible ASTM G59 and NACE standard TM0284-2003,in this case,modified only with regard to the size of the samples.Steel samples transformed from austenite by a slow cooling (cooling rate of 0.5℃.s-1) showed higher susceptibility to hydrogen-induced cracking,with large cracks in the middle of the sample propagating along segregation bands,corresponding to the centerline of the plate thickness.For cooling rates of 10℃.s-1,only small cracks were found in the matrix and micro cracks nucleated at non-metallic inclusions.For higher cooling rates (40℃.s-1) very few small cracks were detected,linked to non-metallic inclusions.This result suggests that structures formed by polygonal structures and segregation bands (were eutectoid microconstituents predominate) have higher susceptibility to HIC.Structures predominantly formed by acicular ferrite make it difficult to propagate the cracks among non-oriented and interlaced acicular ferrite crystals.Smaller segregation bands containing eutectoid products also help inhibit cracking and crack propagation;segregation bands can function as pipelines for hydrogen diffusion and offer a path of stress concentration for the propagation of cracks,frequently associated to non-metallic inclusions.Polarization resistance essays performed on the steel in theas received condition,prior to any heat treatment,showed larger differences between the regions of the plate,with a considerably lower Rp in the centerline.The austenitization heat treatments followed by cooling rates of 0.5 e 10℃.s-1 made more uniform the corrosion resistance along the thicknes
出处 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2011年第S1期168-172,共5页
关键词 hydrogen induced cracking polarization resistance micro-alloyed steel control cooling hydrogen induced cracking polarization resistance micro-alloyed steel control cooling
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参考文献10

  • 1Jianhua Liu,Yanping Bao,Xian Dong,Taiquan Li,Yi Ren,Shuai Zhang.Distribution and segregation of dissolved elements in pipeline slab[J].Journal of University of Science and Technology Beijing,2007,14(3):212-218. 被引量:3
  • 2Rogério Augusto Carneiro,Rajindra Clement Ratnapuli,Vanessa de Freitas Cunha Lins.The influence of chemical composition and microstructure of API linepipe steels on hydrogen induced cracking and sulfide stress cracking. Materials Science and Engineering . 2003 被引量:1
  • 3C.F.Dong,X.G.Li,Z.Y.Hydrogen-induced cracking and healing behaviour of X70 steel. Journal of Alloys and Compounds . 2009 被引量:1
  • 4Evaluation of pipeline and pressure vessel steels for resistance to hydrogen-induced cracking. N ACE TM0284-2003 . 被引量:1
  • 5M.F.R.Gonzalez,,A.A.Gorni,,H.Goldenstein,et al.CCT curve and its microstructural character- rization on a API 5L-X80 steel. CBECIMAT . 2008 被引量:1
  • 6WOLYNEC,S.Electrochemical Techniques in Corrosion. . 2003 被引量:1
  • 7Gonzalez Ramirez,M.F.An study of the transformations during continuous cooling and of the microstructures of a microalloyed X80 steel used for manufacturing pipes for oil and gas transportation. . 2008 被引量:1
  • 8T.Y.Jin,,Z.Y.Liu,,Y.F.Cheng.Effect of non-metallic inclusions on hydrogen-induced cracking of API5L. International Journal of Hydrogen Energy . 2010 被引量:1
  • 9BEIDOKHTI B,DOLATI A,KOUKABI A H.Effects ofalloying elements and microstructure on the susceptibility ofthe welded HSLA steel to hydrogen-induced cracking andsulfide stress cracking. Materials Science and Engineering:A . 2009 被引量:1
  • 10Ming-Chun Zhao,Yi-Ying Shan,Fu Ren Xiao,et al.2</sub>S-resistant behaviors of acicular ferrite and ultrafine ferrite&amp;sid=Materials Letters&amp;aufirst=Ming-Chun Zhao');&#xA; ">Investigation on the H<sub>2</sub>S-resistant behaviors of acicular ferrite and ultrafine ferrite. Materials Letters . 2002 被引量:1

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