About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Design and Processing Optimization for Advanced Manufacturing: From Fundamentals to Application
|
Presentation Title |
Laser Powder Bed Fusion of High-strength, Crack-susceptible Superalloys: Considerations in Composition, Printing Process and Heat Treatment. |
Author(s) |
Marcus Chunwai Lam |
On-Site Speaker (Planned) |
Marcus Chunwai Lam |
Abstract Scope |
Additive manufacturing (AM) by selective laser melting (SLM) is particularly beneficial in producing high-strength superalloys’ components, enabling more efficient designs while simplifying the production process. However, SLM has unique characteristics such as rapid thermal cycle and localised heating that can cause unconventional issues in superalloys such as microcracking, undersized grains and deformation. Many of these issues and their underlying causes are complicated and interrelated. For example, modifying certain alloy elements can lessen the crack susceptibility but reduce the high temperature properties; Some printing parameters and scanning strategies can suppress cracking while reducing the overall production rate. In some cases, conventional heat treatment schemes with rapid air cooling may not be suitable for large, complex-shaped AM components, causing part-level deformation. This presentation aims to share some generalised considerations in optimising the composition, printing process and heat treatment, based on our research experience in several nickel-based superalloys and their components. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Process Technology, Mechanical Properties |