| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
A-124: Microstructural Characterization of Ni-based Multilayer Coating After Laser Cladding on Cast Iron Substrate |
| Author(s) |
Fazati Bourahima, Michel Rege, Christophe Lafarge, Abderazak Khenafi |
| On-Site Speaker (Planned) |
Fazati Bourahima |
| Abstract Scope |
Laser cladding of a Ni-based powder on cast iron molds was performed with a 4kW Nd: YAG laser. The cast iron is used as a thermal exchanger in glass mold industry. But the issue of this material is its poor resistance to corrosion and abrasion. The role of the Ni-based alloy is to protect the mold without affecting its thermal properties. The purpose of this research is to produce multilayer coating without pores or cracks and with a very small dilution zone on a complex surface. The impact of the processing parameters, power (1400 - 2200 W) and scanning speed (0.6 - 4.6 mm/s) on the coating microstructure was investigated with SEM analysis, microhardness and residual stress tests. The influence of the dendrites growing direction during solidification on porosity and cracks appearance was noted. An optimization of the processing parameters is proposed by using a statistical method, analysis of variance. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |