| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advancements in Lightweight Composites, Materials & Alloys
|
| Presentation Title |
Microstructural Evolution and Mechanical Properties of (SiC+TiC) Dispersed AlSi10Mg Based Surface Composite Developed by Laser Composite Surfacing |
| Author(s) |
Bidipta Dam, Jyotsna Dutta Majumdar, Indranil Manna |
| On-Site Speaker (Planned) |
Bidipta Dam |
| Abstract Scope |
Laser composite surfacing (LCS) of (SiC+TiC)/AlSi10Mg on AA7075 substrate was carried out by direct energy deposition method with 6-kW continuous wave fiber-coupled diode laser. Initial trials allowed optimization of process parameters (power density, scan speed, and powder feed rate) to develop defect free clad with compositional and microstructural uniformity. Effects of process parameters on size, morphology and phase were considered. LCS led to improvement of hardness and fretting wear resistance of the composite layer, primarily due to grain refinement and homogeneous distribution of 20-40 μm size SiC and TiC particles in the AlSi10Mg matrix. Effects of process parameters on residual stress and nanomechanical properties were also investigated. Raman spectroscopy was used to observe change in carbide-related phase composition. Thus, the present study demonstrates that LCS of carbides on Al-alloy can significantly improve the mechanical properties paving the way for development of Al-alloy composites by laser-assisted additive manufacturing. |