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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing of Large-scale Metallic Components
Presentation Title Experimental and Numerical Assessment of H13 Tool Steel Produced by Directed Energy Deposition
Author(s) Sameehan S. Joshi, Shashank Sharma, Sangram Mazumder, Mangesh V. Pantawane, Narendra B. Dahotre
On-Site Speaker (Planned) Sameehan S. Joshi
Abstract Scope Laser based directed energy deposition (L-DED) was employed for additive manufacturing of H13 tool steel. A constant laser power of 350 W was implemented during L-DED, while, the scanning speeds were varied from 5.8-14.8 mm/s. Multiscale microstructure and phase evolution observations were performed. A 3-d process model based on multi-track, multi-layer, and multiphysics methodology simulated the complex thermokinetic conditions during L-DED. Spatial variations in thermal gradients and solidification rates within a melt-pool were computationally predicted. Cellular morphology from prior solidified austenite was retained in the microstructure. Precipitates composed of carbide forming elements evolved at cell boundaries/junctions during reheating cycles experienced by the L-DED material. Retained austenite fraction decreased with an increase in the laser fluence. Processing-structure-property relationship in L-DED H13 tool steel was realized by hardness evaluation in various regions of the deposited samples. Hardness of the samples increased along the build height and as a function of laser fluence.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Iron and Steel, Solidification


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Experimental and Numerical Assessment of H13 Tool Steel Produced by Directed Energy Deposition
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Wire Arc Additive Manufacturing of Nano-treated High Strength Aluminum Alloys
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