Recent Developments in Hot Isostatic Pressing (HIP) of Components for Turbomachinery Applications

With advancements in hot isostatic pressing (HIP) systems it is now possible to also perform heat treatment by achieving the desired microstructure during the HIP cycle. This modern approach offers the freedom to consider a combined HIP and heat treatment cycle known as high pressure heat treatment (HPHT™). There are many potential benefits from this processing route such as shorter process times, cost reductions, increased quality, and improved productivity. Material benefits also exist from this processing route. This paper will cover the fundamentals of HPHT™ highlighting key technology changes enabling this approach in modern HIP equipment. Then a transition to recent studies capturing the benefits for aerospace applications leveraging HIP and the HPHT™ methodology along with future possibilities with steered cooling will be reviewed.