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首页> 外文会议>国际断裂力学2009年会 >Fracture behavior of thermal aged duplex cast stainless steel for nuclear power plant
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Fracture behavior of thermal aged duplex cast stainless steel for nuclear power plant

机译：核电站用热时效双相不锈钢的断裂行为

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摘要

The impact properties and ductile-brittle transition temperature (DBTT) as well as the fracture mechanism of Z3CN20-09M CSS made in China treated at 400℃ with different accelerated ageing time are investigated by instrumentation impact test and SEM.The results show that one exception is the variation of the yield force Fgy and the other characteristic values of impact force are indistinctively affected by the thermal ageing time range from 0 to 3000h.And except for the energy corresponding to yield force Wgy,all the impact energy parameters decrease with the increment of the thermal ageing time.Moreover,the impact fracture mode of Z3CN20-09M CSS changes from the microvoid coalescence and the dimpled ductile tearing to the quasi-cleavage fracture with the prolong of the thermal ageing time.The tearing ridge and the river pattern of cleavage fracture can be seen in partial areas after the ageing treatment for 3000h.In addition,DBTT of Z3CN20-09M CSS increases with the thermal ageing time.All these indicate that the thermal ageing embrittle-ment occurs in the Z3CN20-09M CSS.
机译：通过仪器冲击试验和扫描电镜对400℃，不同加速老化时间下中国制造的Z3CN20-09M CSS的冲击性能，韧性-脆性转变温度（DBTT）以及断裂机理进行了研究。结果表明，一种例外是屈服力Fgy的变化，而冲击力的其他特征值不受0至3000h的热老化时间的影响。除了屈服力Wgy所对应的能量外，所有冲击能量参数都随着增加而减小此外，随着热老化时间的延长，Z3CN20-09M CSS的冲击断裂模式从微孔聚结和凹状韧性撕裂变为准解理断裂。时效处理3000h后，局部区域出现断裂断裂。另外，Z3CN20-09M CSS的DBTT随热时效时间的增加而增加。所有这些表明，Z3CN20-09M CSS中发生了热老化脆化。

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  • 来源
    《国际断裂力学2009年会》|2009年|151-154|共4页
  • 会议地点 Chengdu(CN);Chengdu(CN)
  • 作者

    Yuhong Yao; Jianfeng Wei; Jiangnan Liu; Zhengping Wang; Yu Wang;

  • 作者单位

    State Key Laboratory for Mechanical behavior of Materials,Xi 'an Jiaotong University,Xi'an,China School of Materials and Chemical Engineering,Xi'an Technological University,Xi'an,China;

    State Key Laboratory for Mechanical behavior of Materials,Xi'an Jiaotong University,Xi 'an,China;

    School of Materials and Chemical Engineering,Xi'an Technological University,Xi'an,China;

    School of Materials and Chemical Engineering,Xi'an Technological University,Xi'an,China;

    School of Materials and Chemical Engineering,Xi'an Technological University,Xi'an,China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Duplex cast stainless steel; Thermal ageing embrittlement; Fracture mechanism; Impact properties; DBTT;

    机译：双相不锈钢；热时效脆化；断裂机理；冲击性能； DBTT;

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