摘要
采用C-Mn钢韧断机理的研究成果与点缺陷在应力场中的迁移运动规律,分析了在高温下,空位对韧性断裂的微观过程的影响,建立了中温范围内断裂韧度J_(IC)和温度T的关系.在此基础上对多种压力容器钢断裂韧度的实验数据进行了分析,最后验证了模型的合理性.
Using the results from the studies of C-Mn steel ductile fracture mechanisms and the laws of the stress-driven migration of point defects in a stress field,and with an analysis of the micro-process of ductile fracture induced by the vacancy coalescence at high temperatures,a relationship between the fracture toughness J_（IC） and temperature T in the intermediate temperature range is derived from the vacancy concentration. Experimental data of fracture toughness of pressure vessel steels are analyzed.It is shown that there is a good agreement between the theoretical model and the experimental results.
出处
《力学与实践》
CSCD
北大核心
2010年第6期43-48,共6页
Mechanics in Engineering
关键词
空位
断裂韧度
温度
vacancy
fracture toughness
temperature
