Premium
Characterization of laser‐treated Rene 41 surface due to B 4 C and SiC particles at surface prior to laser treatment
Author(s) -
Yilbas B. S.
Publication year - 2014
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.5342
Subject(s) - residual stress , materials science , indentation hardness , surface layer , scanning electron microscope , laser , diffraction , composite material , layer (electronics) , alloy , surface stress , metallurgy , energy dispersive x ray spectroscopy , analytical chemistry (journal) , surface energy , microstructure , optics , chemistry , physics , chromatography
Laser surface treatment of Rene 41 high‐performance alloy is carried out with the presence of hard particles at the surface. B 4 C and SiC particles are uniformly distributed within 40 µm carbon film at the workpiece surface prior to laser treatment process. The effect of hard particles on residual stress and microhardness variations is investigated at the treated surface. Morphological and metallurgical changes in the treated layer are examined by using electron microscopy, energy dispersive spectroscopy, and X‐ray diffraction. Residual stress formed at the surface is determined from the X‐ray data. It is found that the treated surface is free from asperities such as large size voids and cracks. A dense layer is formed in the surface region, which causes volume shrinkage while contributing to microhardness and residual stress enhancement at the surface. B 4 C hard particles result in the highest residual stress and microhardness at the surface, which is attributed to its high thermal expansion coefficient. Copyright © 2013 John Wiley & Sons, Ltd.