论文部分内容阅读
本文初步探讨了氢诱发裂纹作为一种环境诱发缺陷在材料破坏过程中的作用。结果表明,作为一级近似,氢诱发裂纹可视为一组平行于轧制面的面缺陷,它对材料的常规强度指标影响不大,但使材料的脆断倾向增大。HIC和HSC是两类基本互不相关的破裂。对环境断裂具有决定意义的是材料的HSC敏感性。对兼具HSC和HIC敏感性的材料,环境断裂过程可用附图的模式表示。该模式图说明了中低强度结构钢环境断裂时所观察到的一系列试验事实。对由抗HSC性能良好的材料制作的设备或构件,一般地说,夹带诱发裂纹运行不失安全性。
This paper initially explores the role of hydrogen-induced cracking as an environmental-induced defect in the material failure process. The results show that as a first-order approximation, hydrogen-induced cracks can be regarded as a group of plane defects parallel to the rolling surface, which have little effect on the conventional strength of the material, but increase the brittle fracture tendency of the material. HIC and HSC are two types of basically unrelated ruptures. Of decisive for the environmental fracture is the material’s HSC sensitivity. For both HSC and HIC-sensitive materials, the environmental fracture process can be represented graphically in the drawings. This schematic illustrates a series of experimental facts observed during the environmental rupture of low and medium strength structural steels. For equipment or components made of materials that are resistant to HSC, in general, entrainment-induced cracking operates without any loss of safety.