About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
Residual Stress Evaluation in the Laser Powder Bed Fusion of Hybrid Alloys |
Author(s) |
Kudakwashe Nyamuchiwa, Ali Kesharvaz, Clodualdo Aranas |
On-Site Speaker (Planned) |
Kudakwashe Nyamuchiwa |
Abstract Scope |
Excessive residual stress buildup often leads to poor bonding and failure between the substrate and subsequent printed layers in laser powder bed fusion (LPBF). An analytical model based on aspects of the Euler-Bernoulli beam theory is adopted to predict the evolution of longitudinal residual stress for LPBF-M789 alloy in combination with an N709 baseplate. Scaling analysis using the Buckingham Pi theorem estimated the peak residual stress for a build of 100 layers. According to this method, the peak residual stress at the baseplate, measuring 50 mm in height, peaked at about -100 MPa, transitioning from tension to compression from the bottom of the baseplate. At the interface and the 100th layer, the peak residual stress was evaluated to be 300 MPa and 370 MPa, respectively. This phenomenological model allows for quick computation of longitudinal residual stress distribution across multiple layers, compared to other numerical models that require intensive computation. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, |