Back to Search
Start Over
Multi-scale characterization by neutronography and electron diffraction of Ni coating on Cu-Ni-Al or cast-iron glass molds after laser cladding
- Source :
- Thermec 2021, Thermec 2021, May 2020, Vienne, Austria, Materials Science Forum, Materials Science Forum, 2021, Materials Science Forum, Trans Tech Publications Inc., 2021
- Publication Year :
- 2020
- Publisher :
- HAL CCSD, 2020.
-
Abstract
- International audience; Laser cladding of a Ni based powder on Cu-Ni-Al or cast iron was performed with a 4kW continuous Nd: YAG laser. The Cu-Ni-Al and cast-iron substrates are used for their thermal properties in glass mold industry. But the issue of these materials is their lack of resistance on corrosion and abrasion. The role of the Ni based alloy is to protect the mold without affecting its thermal properties (Heat Affected Zone (HAZ)). The purpose of this research is to produce a well bonded Ni based melted powder without pores or cracks on a non-planar surface (curvilinear section). An investigation of the impact of the processing parameters, power (1500-3200 W), scanning speed (2.5-10 mm/s) and powder feeding rate (24.5-32.5 g/min) on the bonding quality, the porosity propagation and HAZ appearance is performed. The used methods are neutronography, Scanning Electron Microscopy, Energy Dispersive Spectroscopy and Electron BackScatter Diffraction (EBSD). These multi-scale techniques are obviously complementary. Neutronography is a well-adapted non-destructive method to observe the porosity in the volume thanks to the contrast between materials. EBSD analysis allows us to analyze the microstructural evolution of the coating notably by observing the dendrites growth. This same method also permits to observe the HAZ nature according to the laser cladding parameters. Those methods allowed to optimize the processing parameters in a way to obtain perfect bonding, to avoid porosity propagation and to limit the HAZ emergence.
- Subjects :
- MEB/EDS/EBSD
Materials science
Scale (ratio)
[SPI] Engineering Sciences [physics]
02 engineering and technology
engineering.material
01 natural sciences
Multi-scale analysis
010309 optics
[SPI]Engineering Sciences [physics]
Coating
[CHIM] Chemical Sciences
0103 physical sciences
[CHIM]Chemical Sciences
General Materials Science
Mechanical Engineering
Metallurgy
021001 nanoscience & nanotechnology
Condensed Matter Physics
Laser cladding
Characterization (materials science)
Electron diffraction
Mechanics of Materials
engineering
Cast iron
0210 nano-technology
Neutronography
Subjects
Details
- Language :
- English
- ISSN :
- 02555476 and 16629760
- Database :
- OpenAIRE
- Journal :
- Thermec 2021, Thermec 2021, May 2020, Vienne, Austria, Materials Science Forum, Materials Science Forum, 2021, Materials Science Forum, Trans Tech Publications Inc., 2021
- Accession number :
- edsair.doi.dedup.....07a9751cf6526aa54bed4a26e112e82d