Research on Failure Mechanism of Super-high Pressure Crystal Vessel

Abstract

Abstract:

Though material tensile test,fracture and fatigue tests, hardness test and microstructure analysis for deactivated crystal reactor vessel,the maximum stress and deformation were obtained in danger zone at the bottom crystal vessel by finite

element method and the rupture strength and fatigue life of crystal vessel were also analyzed and calculated.Combining the analyses about stress corrosion, corrosion fatigue and creep deformation,it is pointed out that the failure of crystal vessel is a brittle fracture under the co-activation between corrosion fatigue and creep.

Key words:

crystal vessel, fatigue, creep, corrosion, material deterioration

摘要：

对失效水晶釜釜体材料进行了拉伸试验、断裂与疲劳性能试验、硬度测试和金相分析，利用有限元法求得了水晶釜底部危险区域的最大应力和变形，分析计算了水晶釜的断裂强度和疲劳寿命。结合对水晶釜应力腐蚀、腐蚀疲劳和蠕变变形等的分析，指出了水晶釜的失效为腐蚀疲劳和蠕变调和作用下的脆性断裂。

关键词:

水晶釜, 疲劳, 蠕变, 腐蚀, 材质劣化



CLC Number:

TG111.91

LIU Kang-Lin, ZHANG Jing-Wei, GONG Chao.

Research on Failure Mechanism of Super-high Pressure Crystal Vessel

[J]. China Mechanical Engineering, 2011, 22(8): 914-916.

刘康林, 张经伟, 公涛.

超高压水晶釜的失效机理研究

[J]. 中国机械工程, 2011, 22(8): 914-916.

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