• CN:11-2187/TH
  • ISSN:0577-6686

›› 1998, Vol. 34 ›› Issue (6): 1-4.

• 论文 •    下一篇

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高锰钢晶界微观应力状态的有限元计算

陈达;薛侃时;王位;王滨;孙大涌   

  1. 上海交通大学材料学院;机械工业部上海材料研究所;机械工业部机械科学研究所
  • 发布日期:1998-11-01

FINITE ELEMENT COMPUTATION OF GRAIN-BOUNDARY MICROSTRESS IN HIGH MANGANESE STEEL

Chen Da;Xue Kanshi;Wang Wei;Wang Bin Sun Dayong   

  1. Academy of Material, Shanghai Jiaotong University Shanghai Research Institute of Materials MMI Research Institute of Mechinery Science and Technology, MMI
  • Published:1998-11-01

摘要: 通过对高锰钢晶粒内部和晶界偏聚硬壳层区域的有限元应力模拟计算,获得了不同偏聚程度条件下的应力状况。计算结果表明,晶界应力集中程度随晶界Mn偏聚浓度和偏聚层厚度的上升而显著提高,由于晶界偏聚而导致的晶界区域硬壳层对高锰钢的断裂性能是非常有害的。从模拟计算这一角度证实了晶界应力集中是高锰钢产生脆断的主要原因,这与宏微观结构成分和力学性能试验所得到的结果吻合。

关键词: 高锰钢, 应力计算, 有限元法, 堆内滞留, 反应堆压力容器, 极限承载能力, 临界热通量, 蠕变

Abstract: By FEM, simulate and calculate the microstress in grain and grainboundary hard-shell of high Mn in different Mn segregation levels. The results show that the extent of grainboundary stress concentration will increase greatly as the grainboundary concentration of Mn element and the thickness of the hard-shell increase. The hard shell due to grainboundary segregation of Mn element is very harmful to the fracture property of high Mn steel, and the simulation computation confirms that the grainboundary stress concentration is the main reason of brittle fracture in high Mn steel.

Key words: FEM, High manganese steel, Stress computation, creep, IVR, RPV, ultimate load capacity, critical heat flux

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