This paper analyzes the J85-CAN-15 engine damage due to fracture of the compressor disc 8th stage dovetail post. An Inner Object Damage (IOD) phenomenon was identified. The damaged compressor disc material is Incoloy 901 forging. The composition of the disc is determined as 42.7%-Ni, 34%-Fe, 13.5%-Cr, 6.2% Mo, 2.5%Ti, 0.1%-Cu, and 0.05%-C. The average hardness value of the material is 44 HRC. The burrs have been observed under Field Emission Scanning Electron Microscope (SEM) and they are considered as the origin of the fatigue on the engine compressor disc. The metallurgical analysis results show that manufacturing defect was propagated under the repeated low and high cyclic loads.

本文分析了J85-CAN-15发动机由于压缩机盘8级燕尾柱断裂而造成的损坏。确定了内部对象损坏（IOD）现象。损坏的压缩机盘材料为Incoloy 901锻件。圆盘的组成确定为42.7％的Ni，34％的Fe，13.5％的Cr，6.2％的Mo，2.5％的Ti，0.1％的Cu和0.05％的C。材料的平均硬度值为44 HRC。在场发射扫描电子显微镜（SEM）下观察到了毛刺，这些毛刺被认为是发动机压缩机盘上疲劳的根源。冶金分析结果表明，在反复的低，高循环载荷作用下，制造缺陷不断扩散。