|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||Microstructure Evolution of Martensitic Stainless Steel in Laser Hot Wire Cladding with Multiple Heating Passes
||Shaopeng Wei, Gang Wang, Zhenguo Nie, Zilin Huang, Yiming Rong
|On-Site Speaker (Planned)
Laser cladding is one of attractive and cost effective means for repairing or remanufacturing high value engineering components. The microstructure and property in laser cladding process with multiple heating passes were investigated by using experimental test and numerical modeling. Multiple layers were cladded on the surface of martensite stainless steel by using fiber laser. The microstructure of clad layer and heat affected zone was characterized using an optical microscope, SEM and EDS. The gradient microhardness from the cladding layer to the substrate was tested. A thermo-mechanical coupling model verified by experimental results was proposed to show the physical field evolution. The change of geometry, preheating of hot wire and heat convection of molten pool were considered in the models with the effect of multiple heating passes. The uneven temperature distribution and high cooling rate led to the forming of gradient microstructure, and further affect the property of cladding interface.
||Planned: A print-only volume