| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Large-scale Metallic Components
|
| Presentation Title |
NOW ON-DEMAND ONLY - The Effect of Preheating Substrate on the Microstructure and Mechanical Properties in Laser Deposited Martensitic Steel |
| Author(s) |
Md Mehadi Hassan, Madhavan Radhakrishnan, Thomas Lienert, Osman Anderoglu |
| On-Site Speaker (Planned) |
Md Mehadi Hassan |
| Abstract Scope |
The traditional manufacturing approach to produce engineering components can have a high energy cost, longer delivery times, and specific geometries that may be unattainable. The Direct Energy Deposition(DED) offers excellent capabilities of fabrication with metal complex geometries, repair, and large-scale additive fabrication among all AM processes. This work focuses on the fabrication of AISI 420 martensitic steel using DED for the application of the aerospace, automotive, and medical industries. AISI 420 martensitic steels(0.4%C,12.7%Cr,in wt.%) were successfully deposited onto the preheating (110⁰Cand190⁰C) 316L substrates. The process produced a near-fully dense deposit. The cross-sectional examination by electron microscopy and XRD confirms dual-phase microstructure of martensite and austenite. Preliminary mechanical characterization by micro-Vickers hardness tests shows a uniform hardness trend across the build. The talk would explore the effects of processing heat input and post-processing heat treatment conditions on the evolution of microstructure, phase transformation, and mechanical performance of 420 martensitic steel. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Mechanical Properties |