About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
Controlling High Temperature Mechanical Performance of Superalloys Fabricated via Laser Powder Bed Fusion through Processing Parameter Variation |
Author(s) |
Nicholas L. Lamprinakos, Joseph Pauza, Anthony Rollett |
On-Site Speaker (Planned) |
Nicholas L. Lamprinakos |
Abstract Scope |
Superalloys are valued for their superior mechanical performance at elevated temperatures. For certain applications, such as high temperature heat exchangers with complex geometries, it can be advantageous to produce superalloy parts via additive manufacturing (AM). However, depending on the processing parameters used, the microstructures of the parts produced via AM can vary greatly. This can lead to variation in mechanical properties. As a result, there is potential to optimize mechanical performance through process parameter variation. In this work, elasto-viscoplasitc fast Fourier transform crystal plasticity simulations were used to predict the mechanical response of synthetic microstructures generated using a modified Potts model approach. Simulated processing parameters were altered to evaluate parameter effects on mechanical response. The simulation results were used to select parameters for printing superalloy mechanical testing coupons. High temperature mechanical testing was performed to evaluate the extent to which mechanical performance at elevated temperature can be controlled. |