Effects of Solid Solution Temperature on Microstructure and Properties of Extruded and Forged FGH95 Superalloys

Abstract

the effects of solid solution temperature on microstructure and properties in extruded and forged FGH95 superalloys are studied in this work. The superalloys with different micrtstructures are prepared through solid solution heat treatment at different temperature, and the microstructures were analyzed by SEM and EBSD. The results show that following with the increase of solid solution temperature, the grain size increase and the amount of primary γ′-phase located at the grain boundary decrease. When the solid solution temperature is higher than the solvus, the primary γ′-phase disappear completely, and as a result, the grain size grow significantly. The orientation of the FGH95 superalloys would not be influenced by the solid solution temperature, but the amount of twins increases following with the increase of solid solution temperature. The tensile and creep property is also studied in this work, the results show that the sub-solid solution heat treatment is suitable for Extruded and Forged FGH95 superalloys.

Experimental Study on FGH95 Superalloy Turbine Disk Joint Material by Oblique Laser Shock Processing

“…In order to improve the performance of the FGH95 superalloy, several scholars have carried out numerous studies using various processes such as powder pretreatment, alloy forming, and heat treatment. The FGH95 superalloy has been studied and analyzed for its strength, fatigue life, and other performance indicators by means of the plasma rotating electrode process (PREP) for powder superalloy preparation [3], spray forming [2], isothermal forging [4], solid solution heat treatment [5], and ageing treatment [6]. In general, the preparation and heat treatment process of the FGH95 superalloy have made more progress, but studies related to enhancing the performance of the FGH95 superalloy from the perspective of surface treatment processing are still in the initial stage.…”