摘要
光滑试样塑-脆转折温度处的解理断裂应力S_(C0),被定名为解理特征应力。它是近年来姚枚等人基于对结构钢冷脆机理的系统研究而提出的一个表征材料解理断裂阻力的新的力学性能指标。S_(C0)的物理本质是晶粒内微裂缝在未钝化条件下穿越晶界扩展所需的最小应力水平,它控制着光滑试样及缺口(裂缝)试样的解理断裂条件及塑-脆转折条件。本文在对已有的解理断裂抗力参量进行分析的基础上,对解理特征应力S_(C0)这一新参量做了介绍。关键词:低温脆断,解理断裂。
In this paper, a new parameter reflecting the resistance to cleavage fracture, named as 'cleavage characteristic stress Sco' , was introduced. Sco is considered to be a critical stress for propagation of unblunted primary cleavage cracks across grain boundaries, which controls the cleavage behavior of structural steels in both plain tension and notch (crack) bending.
出处
《物理测试》
CAS
1994年第1期1-5,共5页
Physics Examination and Testing
关键词
低温脆断
解理断裂
解理抗力
low temperature brittle fracture, cleavage fracture, resistance to cleavage.
