Effect of Creep Holding Time on the Fatigue Behavior in P92 Steel Weldment at High Temperature

摘要

In this study, the crack growth behavior in P92 steel (9 percent Cr-2 percent W) weldment was investigated at 600 deg C under the load of trapezoidal wave shape with various holding times. The relationship between the crack growth behavior and holding time was studied and it was characterized using the DELETA K and (C_t)_(avg) parameters. The number of micro-voids/cavities at the crack tip and fracture modes were examined and the relationship between crack growth rate and holding time was investigated.