|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Hume-Rothery Symposium: Accelerated Measurements and Predictions of Thermodynamics and Kinetics for Materials Design and Discovery
||Integration of computational tools and advanced characterization methods to understand phase transformations in additively manufactured steels
||Greta Lindwall, Niklas Holländer Pettersson, Chia-Ying Chou, Durga Ananthanarayanan, Benjamin Neding, Peter Hedström, Fan Zhang
|On-Site Speaker (Planned)
Additive manufacturing (AM) enables complex tool geometries with improved tool performance as a result. This has, in particular, increased the interest in developing printable medium-carbon steels aimed for hot-work tooling application where the incorporation of conformal cooling channels in the tool design may prolong the tool life considerably. In this work, the as-built microstructures of hot-work tool steels manufactured using laser-powder bed fusion are studied in detail as well as the response to post-print heat treatments. Emphasis is on how Calphad-based computational thermodynamics and kinetics can be applied for materials design and development of suitable post-heat treatments. Experimental characterization methods including ex-situ and in-situ synchrotron-based diffraction are employed for model calibration. Protocols for quantifications of retained austenite fractions in AM tool steels accounting for texture and spatial variations are discussed.
||Additive Manufacturing, Computational Materials Science & Engineering, Characterization