The cracks on blades made of a directionally solidified superalloy were analyzed.The failure mode and cause were studied in virtue of fracture observation and metallographic analysis.

• 对定向凝固合金叶片的裂纹进行分析,在断口观察与金相组织分析的基础上,对叶片的失效模式与失效原因进行研究,并提出预防该类故障发生的措施。