Abstract
An investigation has been made of laser cladding by feeding a mixture of fine powder of Zr02-8wt% Y203 and 316L austenitic stainless steel into a laser generated melt pool on a 0.2wt% carbon steel substrate. The effects of the powder feed rate, scanning speed and laser power are discussed. Microstructural studies and compositional analysis of single tracks have been made using optical microscopy and scanning electron microscopy with dispersive X-ray spectrometry (EDS). X-ray diffraction was used to investigate the phases present after laser cladding. The clad layer contained distinct regions of stainless steel and of ceramic. The austenitic stainless steel regions were free of cracks, while the yttria partially stabilized zirconia (YPSZ) regions showed some cracking particularly along the interface between the stainless steel and the ceramic. The stainless steel regions showed a high hardness, associated with a cellular/dendritic structure, corresponding to cooling rates in the range of 10 to 10K/s during solidification.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
