相界面对核电Z3CN20-09M不锈钢裂纹萌生和扩展的影响

被引:0
|
作者
朱晓锋 [1 ]
陆永浩 [1 ]
杨海波 [2 ]
机构
[1] 北京科技大学国家材料服役安全科学中心
[2] 北京科技大学机械工程学院
关键词
核级不锈钢; 原位拉伸; 奥氏体/马氏体相界; 裂纹萌生与扩展;
D O I
暂无
中图分类号
TG142.71 [不锈钢、耐酸钢];
学科分类号
摘要
为研究国产核级主管道不锈钢Z3CN20-09M中奥氏体/铁素体相界面在裂纹萌生与扩展过程中的作用,通过扫描电镜原位拉伸技术对核级主管道不锈钢在拉伸过程中的组织形变、微裂纹的萌生与扩展进行原位观察,对断口进行了分析.研究表明,在拉伸过程中,微裂纹优先在杂质颗粒和相界位置萌生.当铁素体/奥氏体界面垂直于拉伸方向时,裂纹倾向于沿相界萌生,并沿相界扩展;当铁素体/奥氏体界面平行于拉伸方向时,微裂纹在相界开裂,并垂直于界面扩展,主裂纹发生偏折,界面在裂纹扩展过程中起阻碍作用.
引用
收藏
页码:69 / 74
页数:6
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    王正品
    邓薇
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    石崇哲
    金耀华
    [J]. 西安工业大学学报, 2011, 31 (02) : 136 - 140
  • [2] 奥氏体不锈钢应力腐蚀破裂探讨
    张振杰
    [J]. 石油化工腐蚀与防护, 2006, (02) : 48 - 50
  • [3] Growth of short cracks during low and high cycle fatigue in a duplex stainless steel[J] . International Journal of Fatigue . 2012
  • [4] Short crack nucleation and growth in lean duplex stainless steels fatigued at room temperature[J] . International Journal of Fatigue . 2012
  • [5] Experimental characterization of short fatigue crack kinetics in an austeno-ferritic duplex steel[J] . Procedia Engineering . 2011
  • [6] Atomic-scale simulation of α/γ-iron phase boundary affecting crack propagation using molecular dynamics method
    Zhang, Yan
    Zhang, Fu-cheng
    Qian, Li-he
    Wang, Tian-sheng
    [J]. COMPUTATIONAL MATERIALS SCIENCE, 2011, 50 (05) : 1754 - 1762
  • [7] Activated slip systems and microcrack path in LCF of a duplex stainless steel[J] . Maria-Cecilia Marinelli,Ahmed El Bartali,Javier W. Signorelli,Pierre Evrard,Véronique Aubin,Iris Alvarez-Armas,Suzanne Degallaix-Moreuil.Materials Science & Engineering A . 2009 (1)
  • [8] Microcrack growth and fatigue behavior of a duplex stainless steel[J] . M. Balbi,M. Avalos,A. El Bartali,I. Alvarez-Armas.International Journal of Fatigue . 2009 (11)
  • [9] Microstructure associated with crack initiation during low-cycle fatigue in a low nitrogen duplex stainless steel[J] . International Journal of Fatigue . 2006 (4)
  • [10] In situ SEM tensile test of high-nitrogen austenitic stainless steels[J] . Z.Z. Yuan,Q.X. Dai,X.N. Cheng,K.M. Chen,L. Pan,A.D. Wang.Materials Characterization . 2005 (1)