GEOMETRIC AND MICROSTRUCTURAL ANALYSIS OF LASER CLAD NiCoCrAlYTa COATING ON STAINLESS STEEL AISI 316L

Authors

  • Juan Carlos Pereira Falcón Centro de Investigaciones en Mecánica, Facultad de Ingeniería, Universidad de Carabobo
  • Juan José Candel Bou Instituto de Tecnología de Materiales, Universidad Politécnica de Valencia
  • José Manuel Amado Paz Departamento de Ingenierí­a Industrial II, Universidade da Coruña, Campus Ferrol
  • Vicente Amigó Borrás Instituto de Tecnología de Materiales, Universidad Politécnica de Valencia

Abstract

In  this  work,  the  NiCoCrAlYTa  Alloy  was  deposited  by  laser  cladding  with  different  processing  parameters  (flow  rate  of  powder supplied, feed speed and laser power), in order to analyze the effects of processing on the geometry, microstructure and properties of the coating.  We  have  measured  the  dimensions  of  the  tracks  by  optical  microscopy  and  computer  image  analysis.  Scanning  electron microscopy (SEM) and energy dispersive spectroscopy  microanalysis (EDS) have been used to  analyze the  microstructure, chemical composition and microhardness variations. The coatings exhibit good geometric aspect ratio without cracks and macro pores, and a good metallurgical bond with the substrate through the dilution zone was obtained; yet there is no a homogeneous columnar dendrite structure that depends on the processing laser. It has been observed that the surface hardness of the coating is twice that of the substrate hardness. The  EDS  microanalysis  evidenced  the  dilution  and  mixing  of  relevant  chemical  elements  such  as  Fe,  Co, Al  and  Ta  with  Ni-Cr, generating a gradual variation between substrate and coating which influences the hardening observed at the interface.

Downloads

Download data is not yet available.

Author Biography

Juan Carlos Pereira Falcón, Centro de Investigaciones en Mecánica, Facultad de Ingeniería, Universidad de Carabobo

Prof. Juan Carlos Pereira F., MSc. Ing. Departamento de Materiales y Procesos de Fabricación Escuela de Ingeniería Mecánica Universidad de Carabobo Naguanagua - Edo. Carabobo - Venezuela Oficina: +58 241 9966103 jpereira@uc.edu.ve www.ing.uc.edu.ve/jpereira www.ing.uc.edu.ve/mecanica

Downloads

Published

2013-07-17

How to Cite

Pereira Falcón, J. C., Candel Bou, J. J., Amado Paz, J. M., & Amigó Borrás, V. (2013). GEOMETRIC AND MICROSTRUCTURAL ANALYSIS OF LASER CLAD NiCoCrAlYTa COATING ON STAINLESS STEEL AISI 316L. LatinAmerican Journal of Metallurgy and Materials, 209–217. Retrieved from https://www.rlmm.org/ojs/index.php/rlmm/article/view/489

Issue

2014, 34(2)

Section

Regular Articles

License

The authors of papers accepted for publication by the RLMM, should recognize the complete transfer of copyright (in all languages) to the RLMM. This transfer includes the right by the RLMM to adapt the article for digital or printed reproduction without altering the written content and information displayed in tables or figures within. The authors retain the copyright and guarantee the journal the right to be the first publication of the work as well as licensed under a Creative Commons Attribution License 4.0 Internacional (CC BY 4.0) which allows others to share the work with an acknowledgment of the authorship of the work and the initial publication in this journal.