THE EFFECTS OF HEAT TREATMENT AND （热处理的影响）.pdf

THE EFFECTS OF HEAT TREATMENT AND MICROSTRUCTURE VARIATIONS ON DISK SUPERALLOY PROPERTIES AT HIGH TEMPERATURE Timothy P. Gabb1 1 1 3 , John Gayda , Jack Telesman , Anita Garg 1 NASA Glenn Research Center; 21000 Brookpark Rd.; Cleveland, OH 44135 3University of Toledo; 21000 Brookpark Rd.; Cleveland, OH 44135 Keywords: disk, superalloys, microstructure Abstract desirable that these models have resolution at least as good as that from more widely used process-property models [5]. The effects of heat treatment and resulting microstructure variations on high temperature mechanical properties were A study was therefore conducted to examine the effects of assessed for a powder metallurgy disk superalloy LSHR. Blanks different quench and aging heat treatments on microstructures and were consistently supersolvus solution heat treated and quenched high temperature mechanical properties of the disk superalloy at two cooling rates, than aged at varying temperatures and times. LSHR. Powder metallurgy-processed material blanks were first Tensile, creep, and dwell fatigue crack growth tests were then supersolvus solution heat treated for a consistent grain size. They performed at 704°C. γ ′ precipitate micros