About this Abstract |
Meeting |
Superalloys 2024
|
Symposium
|
Superalloys 2024
|
Presentation Title |
E-3: Improving the Additive Manufacturing Processability of a γ/γ' Cobalt-based Superalloy Through Tailored Chemical Modifications Without Degrading Hot Mechanical Properties |
Author(s) |
Thibaut Froeliger, Didier Locq, Louise Toualbi, Thomas Elcrin, Rémy Dendievel |
On-Site Speaker (Planned) |
Thibaut Froeliger |
Abstract Scope |
This study aims to optimize the content of minor elements (C, B, Zr, Si, Hf) to enhance the manufacturability of γ/γ' cobalt-based superalloys by additive manufacturing without degrading hot mechanical properties or oxidation resistance. Results show that reducing the amount of minor elements improves resistance to liquid phase cracking during additive manufacturing. However, removing these elements leads to a degradation of grain boundary strength or a reduction in the efficiency of the protective oxide layer at high temperatures. To reconcile these different aspects, the contents of minor elements are adjusted in a γ/γ' cobalt-based superalloy following the study of its solidification path. The chemical modifications enable the development of various crack-free microstructures by directed energy deposition, which is unattainable before the chemical modifications. Creep and cyclic oxidation testing show that these chemical modifications do not affect the initial properties of the superalloy. |
Proceedings Inclusion? |
Definite: At-meeting proceedings |