X65管线钢的动态断裂行为研究  

Dynamic Fracture of Pipeline Steel X65

作　　者：柳永宁[1] 冯耀荣[2] 宋小龙[1] 王雪元[1] 庄传晶[2] 马秋荣[2] 

机构地区：[1]西安交通大学金属材料强度国家重点实验室,西安710049 [2]中国石油天然气集团公司石油管力学和环境行为重点实验室

出　　处：《西安交通大学学报》2001年第11期1171-1174,共4页Journal of Xi'an Jiaotong University

基　　金：石油部中青年科技创新基金资助项目 (CNPC2 0 0 0 - 10 )

摘　　要：采用热激活方法研究了X65管线钢的动态断裂韧性以及温度效应 .研究结果表明 :该材料的断裂韧性随加载速率提高而降低 ,存在由加载速率引起的韧脆转化 ,升高温度将使这一转化向高速区移动 .通过热激活分析 ,获得了断裂激活能以及与温度和加载速率相关的定量化关系 .该关系可以预测一定温度和速率范围的断裂韧性 ,同时在固定的速率下 ,该关系较好地预测了止裂韧性与温度的关系 ,从而为用小试样测试止裂韧性指出了可能性 .The fracture toughness of pipeline steel X65 was studied at different temperatures. It was found that fracture toughness was strongly affected by temperature and loading rate. The fracture toughness decreases with temperature decreasing and loading rate increasing. At constant temperatures, only increasing loading rate can induce the transition from ductile to brittle. There is a fracture transition caused by loading rate. Through thermal activation analysis, a quantitative relationship was found. It can be used to describe the fracture process at different temperatures and loading rates. At some loading rate, the relationship can be well used to predict arrest toughness and to provide the possibility of measuring arrest toughness with small size specimens.

关 键 词：钢 加载速率 热激活 动态断裂韧性 温度效应 石油管线 X65钢 

分 类 号：TE973.1[石油与天然气工程—石油机械设备] TG142.12[一般工业技术—材料科学与工程]