Abstract
The Metallurgical change of laser welding of high temperature Oxide Dispersion Strengthened (ODS) ferritic stainless steel has been studied. The PM2000 laser weld microstructure was examined using a combination of optical microscopy, scanning electron microscopy and energy dispersive X-ray analysis. The results indicated that the welds reveal an agglomeration of yttrium oxide particles which were founded at the top of the surface as well as inside the weld. Furthermore, laser welding also changed microstructure of the bulk to the form of dendrite structure.
