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Meeting MS&T22: Materials Science & Technology
Symposium Advanced Materials for Harsh Environments
Presentation Title In Situ X-ray Diffraction during Simulated Hot Isostatic Pressing of Additively Manufactured Inconel 625
Author(s) Darren C. Pagan, Rachel Lim, Timothy Officer, Tony Yu, Yanbin Wang
On-Site Speaker (Planned) Darren C. Pagan
Abstract Scope Hot isostatic pressing (HIP) is a common post-processing step for many additive manufacturing techniques to minimize the porosity commonly present in the as-built condition. However, secondary heat treatments used to the attain a target microstructure (including specific grain size, texture, and precipitate size) often negate the effects of the HIP process. As such, efforts are underway to combine the HIP process with standard heat treatments in a single processing step to enable both porosity minimization and microstructure optimization. To help accelerate processing route design, in-situ X-ray diffraction capabilities previously developed to understand subsurface rock deformation have been adapted to simulate HIP conditions and monitor bulk microstructural evolution in situ. To demonstrate this capability, recrystallization kinetics are quantified from X-ray diffraction data gathered during simulated HIP performed on as-built Inconel 625 produced using laser powder-bed fusion.


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