IAMSuper

Haynes®282® (Haynes International, USA) is one of the Ni-based superalloys that is used for turbine rear frame and turbine exhaust case applications. The main reasons for the use of this alloy are due to the combination of properties like creep strength, thermal stability and fabricability.  Because of the excellent fabricability of this alloy, there is a great interest within the industries to manufacture Haynes 282 through powder bed fusion (PBF) techniques.

As PBF enable the capability to produce near-net-shape complex lightweight parts and the possibility of customizing the microstructure during processing, it ultimately improves the efficiency and enhances the sustainability within aerospace and gas turbine industry.  However, still, the knowledge and understanding within PBF of Haynes 282 is not yet mature enough so that the industry could confidently use it for component production. This could be clearly seen as there are only a few published scientific literatures on PBF of Haynes 282.

Generally, the metal PBF is a complex process that involves numerous process parameters and manufacturing steps. During manufacturing, the built material undergoes complex thermal cycling because of the layer-upon-layer building process. Moreover, post-treatment, such as hot isostatic pressing (HIP) and heat treatment, causes further changes the material that significantly influences the functional performance of the component. Thus, it is important to identify the effect of these thermal conditions on the microstructure and how these microstructures affect the functional performance and quality of the printed parts. Understanding these relationships also make it possible to optimise the PBF microstructures for desired applications which is of great interest for the project partners.

Therefore, to strengthen the knowledge and accelerate the development within this area, further scientific research is needed. Therefore, the scientific goal of this project is to identify key relationships between thermal conditions and microstructure formation in PBF of Ni-based Superalloy Haynes 282 through a modelling approach.