BEHAVIOR OF FORGED S-816 TURBINE BLADES IN STEADY-STATE OPERATION OF J33-9 TURBOJET ENGINE WITH STRESS-RUPTURE AND METALLOGRAPHIC EVALUATIONS

摘要

Metallographic examinations were made to determine possible causes of the scatter and although numerous differences in microstructures of blades were found, no consistent tendencies were observed and the findings did not permit an explanation of the scatter of blade performance. The results of the metallographic examinations and of the physical tests indirectly indicated that variables in fabricating methods caused the scatter in properties.