The causes of early fracture of In783 alloy bolt in ultra-supercritical unit and its application suggestions

The causes of early fracture of In783 alloy bolts were analyzed, and the negative creep phenomenon of In783 alloy bolts was discussed. It was concluded that the early fracture of In783 alloy bolts was related to the non-standard disassembly process, poor manufacturing quality, performance degradation after service and negative creep. Finally, the application suggestions of In783 alloy bolts were given.