HIP of Near-Net Turbine Disks

Abstract

A program was undertaken to evaluate the relative shapemaking capabilities of metal can plus HIP and Crucible's ceramic mold plus HIP methods. Using a small but co:nplex disk/ shaft assembly, it was shown that the ceramic mold approach afforded the greatest potential for very complex shapes. This process was then scaled to produce a third stage turbine disk for the F-102 engine. Properties of the HIP plus heat-treated PA-101 alloy met or exceeded the program goals and a weight savings of 70 lb (32 kg) was demonstrated.

Structure-property characterization of rheocast and VADER processed IN-100 superalloy

“…Such a powder particle is tn fact a "microcasting". and the particulates can be easHy consolidated by a variety of processes (e.g., sintering, HIP, hot extrusion, forging and cold pressing) and may be denslfied to net shape without any postdens1flcatton deformatlon (19,46). Furthermore, the compacted powders can be subsequently hot extruded to give rise to an ultrafine grain size.…”