|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pioneers in Additive Manufacturing
||A-97: Microstructure Evolution and Galling Properties of Hard Facing Coatings Deposited Using Laser Directed Energy Deposition
||Niyanth Sridharan, Brian Jordan, Ryan R Dehoff, Sudarsanam Suresh Babu
|On-Site Speaker (Planned)
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.
||Planned: Supplemental Proceedings volume