用测力螺栓式WOL法测定硫化氢应力腐蚀的K<sub>ISCC</sub>及(da)/(dt)

用测力螺栓式WOL法测定硫化氢应力腐蚀的K_ISCC及(da)/(dt)

摘要: 在硫化氢水溶液环境中用WOL试样测定了16Mn钢的应力腐蚀门限强度K_ISCC及裂纹扩展速率(da)/(dt)。为了监测裂纹扩展,应用了测力螺栓方法。实验表明,此测力螺栓方法既可保证一定的精度要求,也便于操作。

Abstract: Stress Corrosion threshold stress intensity K_ISCC and stress corrosion crack growth rate (da)/(dt) have been measured for 16Mn steel in H₂S aqueous environments with WOL specimens. In order to monitor crack growth in WOL specimens, a technique of instrumented bolt was used in this work. It is found that the technique of instrumented bolt provides several advantages, including enough accuracy and convenient operating.