Metallic laser clad coatings: On the pirocessing-microstructure-property relationships

V. Ocelik*, U. de Oliveira, J. Th. M. De Hosson

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

2 Citations (Scopus)
101 Downloads (Pure)

Abstract

A thick metallic coating that is resistant against high loading impact, severe wear and corrosion at high temperatures can be produced through the laser clad method. This work introduces the Orientation Imagining Microscopy based on electron backscatter diffraction in a scanning electron microscope as a very powerful instrument for studying relationships between processing parameters and the microstructure of individual laser tracks and final coatings formed by overlap. The study has been performed on thick (similar to 1mm) Co-based coatings prepared by a 2 kW CW Nd:YAG laser cladding on 42CrMo4 steel substrate using Substantially different laser beam scanning speeds.

OIM provides new insights into the microstructure of laser clad coatings and yields very useful information concerning the directional grow of individual grains, the solidification texture and the shape of solidification front during laser cladding. Strong correlations between these parameters and laser cladding speed as well as the presence of internal interfaces with the sharp microstructural and mechanical properties changes are presented and discussed.

Original languageEnglish
Title of host publicationSURFACE EFFECTS AND CONTACT MECHANICS IX
EditorsJTM DeHosson, CA Brebbia
Place of PublicationSOUTHAMPTON
PublisherWIT PRESS/COMPUTATIONAL MECHANICS PUBLICATIONS
Pages39-50
Number of pages12
ISBN (Print)978-1-84564-186-3
DOIs
Publication statusPublished - 2009
Event9th International Conference on Surface Effects and Contract Mechanics - , Portugal
Duration: 9-Jun-200911-Jun-2009

Publication series

NameWIT Transactions on Engineering Sciences
PublisherWIT PRESS/COMPUTATIONAL MECHANICS PUBLICATIONS
ISSN (Print)1746-4471

Other

Other9th International Conference on Surface Effects and Contract Mechanics
Country/TerritoryPortugal
Period09/06/200911/06/2009

Keywords

  • laser cladding
  • microstructure
  • orientation imaging microscopy
  • COBALT-BASED ALLOY

Fingerprint

Dive into the research topics of 'Metallic laser clad coatings: On the pirocessing-microstructure-property relationships'. Together they form a unique fingerprint.

Cite this