About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Comparison of Deformation Behavior in L-PBF Ni-based Superalloy with Different Preheating Temperatures: Insights from As-Built and HIP States Via In-Situ Synchrotron Tensile Testing |
Author(s) |
Yixuan Chen, Weihao Wang, Yao Ou, Hai Chang, Zirong Zhai, Rui Yang |
On-Site Speaker (Planned) |
Yixuan Chen |
Abstract Scope |
In this study, we compared the microstructure and mechanical behavior of IN738LC samples manufactured by laser powder bed fusion (L-PBF) under preheating conditions of 200 °C and 700 °C, both in as-built and hot isostatic pressing (HIP) states. Preheating at 700 °C led to a <001> textured columnar microstructure with nano carbide precipitates, which contributed to the superior work hardening capacity compared to 200 °C preheating. Additionally, the as-built microstructural features such as texture orientation and grain size were retained after Hipping. To gain deeper insights into the deformation behavior of L-PBFed IN738LC, we employed in-situ synchrotron tensile testing. This advanced testing method allowed us to examine the lattice strain of different crystal planes and the evolution of dislocation density during the tensile process. By comparing the results between the as-built and HIP conditions, we were able to highlight the distinct deformation mechanisms induced by different preheating temperatures. |
Proceedings Inclusion? |
Planned: |