About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
On the Applicability of CALPHAD and Process Models to Predict Solidification Cracking |
Author(s) |
Mustafa Megahed, Klaus Buessenschuett, Philipp Stich, Markus Apel, Ludo Bautmans, Christian Haase |
On-Site Speaker (Planned) |
Mustafa Megahed |
Abstract Scope |
Processing of non-weldable alloys remains a challenge mitigated by two approaches: Alloy optimization or design (e.g. Scalmalloy® for L-PBF) and identification of processing parameters avoiding crack initiation (e.g. preheating). ICME tools have been shown to support screening of alloying elements and the prediction of process related porosity, surface defects and part scale distortion reliably. Crack modelling is more challenging and requires more validation. This study compares the accuracy of several solidification cracking models. 15 alloys, the behavior of which is well known to range from weldable to non-weldable, are studied. The hot cracking models use CALPHAD and process models to assess the crack susceptibility of the chosen alloys. The results indicate that predicted crack susceptibility trends are not reliable. The best performing model is identified and discussed. Ingredients for improved models are gathered and presented as a foundation for the development of a universal hot cracking criterion. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, ICME, Modeling and Simulation |