摘要
在非平衡统计断裂力学的基础上研究了辐照条件下金属的氦脆断裂问题；明确了高温氦脆（ＨＴＨＥ）的微观机理，建立了晶界上氦泡形核和长大模型，推导出氦泡形核和长大速率公式．应用氦泡演化方程得到氦泡密度分布函数和材料寿命，所得计算结果与实验值一致．
Based on the nonequilibrum statistical mechanics of fracture,the helium embrittlement of irradiated metals was studied.A microcopic mechanism of HTHE was proposed,including the model of nucleation and growth of the helium bubbles.The rate formulae of nucleation and growth of helium bubbles were derived.By using the helium bubbles evolution equation,the density distribution function of helium bubbles and the lifetime of the material were deduced.The good consistency between the theoretical results and the experimental data demonstrates the correctness of the proposed theory.
出处
《北京理工大学学报》
EI
CAS
CSCD
1997年第5期539-544,共6页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金
关键词
氦脆
形核
断裂
辐照致脆
金属材料
helium embrittlement
helium bubbles
nucleation
growth
lifetime
statistical theory
