| About this Abstract |
| 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 |