采用扫描电镜(SEM)、X射线衍射分析(XRD)及透射电镜(TEM)研究了不同形变量下的亚稳态不锈钢(AISI 304)经过低温敏化处理(380℃、240 h的真空热处理)后组织的变化.通过双循环电化学动电位活化技术(DL-EPR)对敏化态的试样进行敏化度(DOS)测试,并用电化学阻抗谱表征了不同试样的耐腐蚀性能.结果表明,随着变形量的增加,低温敏化试样的敏化度递增,材料的耐腐蚀性能下降,当变形量达到40％时,敏化度达到71％.经过DLEPR测试后,试样奥氏体晶粒和大部分晶界完好,马氏体区域是主要腐蚀区域,腐蚀模式为穿晶腐蚀.马氏体板条和基体中的滑移带是碳化物容易形核的位置.
参考文献
| [1] | Abou-Elazm A,Abdel-Karim R,Elmahallawi I,et al .Correlation between the degree of sensitization and stress corrosion cracking susceptibility of type304H stainless steel[J].Corros.Sci.,2009,51 |
| [2] | Li W J,Young M C,Lai C L,et al .The effects of rolling and sensitization treatments on the stress corrosion cracking of 304L stainless steel in salt spray environment[J].Corros.Sci.,2013,68 |
| [3] | 易雪庆,陆永浩,陈迎锋.敏化和固溶处理对核级不锈钢Z3CN20-09M相间腐蚀敏感性的影响[J].中国腐蚀与防护学报,2013(02):141-147. |
| [4] | 姜勇,巩建鸣,李峰.敏化对304L不锈钢在高温NaOH溶液中应力腐蚀开裂的影响[J].机械工程材料,2010(02):35-38. |
| [5] | 张根元,吴晴飞 .固溶处理温度对304奥氏体不锈钢敏化和晶间腐蚀的影响[J].腐蚀与防护(Corrosion & Protection),2012,33(8):695-698.,2012. |
| [6] | Kain V,Chandra K,Adhe K N,et al .Effect of cold work on low-temperature sensitization behavior of austenitic stainless steels[J].J.Nucl.Mater.,2004,334:115-132.,2004. |
| [7] | Singh R .Influence of cold rolling on sensitization and intergranular stress corrosion cracking of AISI 304 aged at 500℃[J].J.Mater.Process.Technol.,2008,206:286-293.,2008. |
| [8] | Lü J L,Luo H Y .Influence of tensile pre-strain and sensitization on passive films in AISI 304 austenitic stainless steel[J].Mater.Chem.Phys.,2012,135:973-978.,2012. |
| [9] | Lü J L,Luo H Y .Temperature dependence of sensitization on tensile pre strained AISI 304 stainless steels[J].J.Alloys Compd.,2014,588(5):509-513.,2014. |
| [10] | Manganon P L,Thomas G .Structure and properties of thermal mechanically treated 304 stainless steel[J].Metall.Trans.,1970,1(6):1587-1594.,1970. |
| [11] | Viana N F,Nunes C S,Abreu H F G .The variant selection in the transformation from austenite to martensite in samples of maraging-350 steel[J].J.Mater.Res.Technol.,2013,2(4):298-302.,2013. |
| [12] | Butler E P,Burke M G .Chromium depletion and martensite formation at grain boundaries in sensitized austenitic stainless steel[J].Acta.Metall.,1986,34(3):557-570.,1986. |
| [13] | Briant C L,Ritter A M .The effects of deformation induced martensite on the sensitization of austenitic stainless steels[J].Metall.Trans.A.,1980,11(12):2009-2017.,1980. |
| [14] | Mukhopadhyay C K,Jayakumar T,Kasiviswanathan K V,et al .Study of ageing induced α-martensite formation in cold-worked AISI type 304-stainless steel using an acoustic emission technique[J].J.Mater.Sci.,1995,30(18):4556-4560.,1995. |
| [15] | 李冬玲,方建锋,刘庆斌,卢翠芬,张晋远.X-射线小角散射法测定钢铁及合金中析出相的粒度[J].冶金分析,2008(03):1-8. |
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