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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Pioneers in Additive Manufacturing
Presentation Title A-97: Microstructure Evolution and Galling Properties of Hard Facing Coatings Deposited Using Laser Directed Energy Deposition
Author(s) Niyanth Sridharan, Brian Jordan, Ryan R Dehoff, Sudarsanam Suresh Babu
On-Site Speaker (Planned) Niyanth Sridharan
Abstract Scope Surface engineering is a topic of great relevance today from the standpoint of enhanced wear and corrosion resistance. In this work we attempt to deposit and evaluate the galling resistance of a new hard facing alloy. The alloy based out of a stainless steel composition is designed to solidify as a nano crystalline material during laser deposition. The hard facing material was deposited on a maraging steel substrate and characterized using electron microscopy and X-Ray diffraction. Characterization using X-Ray diffraction showed that on solidification the material partially amorphized though the bulk of the deposit was crystalline with hardness in excess of 800 VHN. A detailed microstructure evolution performed using multi scale characterization coupled with computational thermodynamics showed complex boride phases in the matrix leading to significant increase in the hardness and wear performance of the deposited alloy. The galling performance of these alloys was evaluated using a custom designed jig.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

3DP Retrospective: Do Inventors Know What They Are Doing?
A-94: 3D Additive Manufacturing of Metals at Micro/Nanoscale Using Localized Electrodeposition
A-95: Direct Metal Write Additive Manufacturing of Rare-earth Modified Aluminum Alloys Using Electromagnetic Heating Systems
A-96: FEM Modeling of Steel Additive Manufacturing Using Laser Hot-Wire Process
A-97: Microstructure Evolution and Galling Properties of Hard Facing Coatings Deposited Using Laser Directed Energy Deposition
A-98: Novel High Temperature Drop on Demand Liquid Metal-jetting for the Production of Complex 2D and 3D objects
A History of Additive Manufacturing
AFRL Contributions to Additive Manufacturing of Titanium, ca 2000
Assent and Decline of LOM Technology
Directed Light Fabrication: A Near-Net Shape Process using Laser Assisted Metal Deposition
Early Developments of AM within the UK
Laser Deposition of Metallic Powders
Laser Engineered Net Shaping - AM Metal Parts with Exceptional Material Properties
Making Things Bit-by-byte: Opportunity in a Fortuitous Convergence of Technologies
Pioneering International Consensus
Process Fundamentals for Selective Laser Melting: Power Ratio, Melting, Porosity, and Build Properties

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