About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing Modeling, Simulation and Machine Learning
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Presentation Title |
Development of a Microstructure-Informed CPFE Model for the High-Temperature Application of SLM Inconel 718 Alloy |
Author(s) |
Chamara Herath, Nipun Wijesinghe, Steven M Arnold, Ajit Achuthan |
On-Site Speaker (Planned) |
Chamara Herath |
Abstract Scope |
Inconel 718 (IN718), a nickel-based superalloy, is widely used in aerospace applications due to its excellent high-temperature mechanical properties. Additive manufacturing (AM) processes such as selective laser melting (SLM) have emerged as promising manufacturing processes for IN718, but the impact of the complex microstructure evolved due to rapid solidification on mechanical behavior is not fully understood. To address this knowledge gap, a combined experimental and modeling investigation was performed. First, a series of material and mechanical properties characterization experiments were conducted to elucidate the multi-phase compositions of SLM IN718, their dependence on heat treatment conditions, and their influence on high-temperature mechanical properties. Informed by these experimental insights, a temperature-dependent crystal plasticity finite element (CPFE) model was developed, incorporating the various phases: γ, γ', γ'', and δ. This experimentally validated model successfully predicted unique material mechanics such as anomalous yielding and tension/compression asymmetry. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Temperature Materials, Modeling and Simulation |