Post on 29-Jul-2020
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Laser Cladding Finite Element Modelling Application to Ti6Al4V
TRAN Hoang-Son
BRUSTEN Romain
JARDIN Ruben,
PAYDAS Harkan,
DUCHENE Laurent
LECOMTE BECKERS Jacqueline.
HABRAKEN Anne Marie
20 Mai 2016
University of Liège
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1. Introduction
Outline
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5. Conclusion & Perspectives
2. Experimental
4. Validation & Limitations
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3. Simulation
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Introduction
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Bhattacharya & al. (2011)
Innovative
technology
Production of
dense parts
Multilayer metal
deposit
Very high cooling
rates
(ultrafine grain
microstructure) Sirris
Need of a thermal model: Study of processing parameters:
laser power
powder flow
preheating temperature (T°)
laser beam velocity
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Introduction
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Reproduction of the experiment described in the article: Laser claddingas a repair technologyfor Ti6Al4V alloy: influence of incident energy and building strategy on microstructure and hardness. H.Paydas, A.Mertens, R.Carrus, J. Lecompte-Beckers and J.TchoufangTchuindjang.
«MacroClad» et «Constant tracklength» building strategy
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Experimental
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Focus on the first layer
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Synthesis of measures of the depth HAZ - ADD166
Experimental
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Experimental
² Thermo physical properties of materials
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Results of Romain
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24 393 Nodes 26 991 Elements for 2 tracks
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11 056 Nodes 9030 Solid Elements + 5340 CONRA Elements for 7 tracks
Simulation
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3D finite element mesh
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Simulation
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(Costa 2005)
Form of laser beam and its distribution
Scheme showing the cylindrical
radius of the laser used by Sirris Scheme showing the laser power
density of the laser used by Sirris
Schematic showing Gaussian
distribution of laser
Power density concentration
1.4 mm
1.6 mm
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Simulation
² Flux_1 Flux_3
Flux_2
Flux_2=2×Flux_1 Flux_3=4×Flux_1
Flux_2=1,5×Flux_1 Flux_3=2×Flux_1
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Simulation
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Effect of Convection & Radiation Parameters
Effect of point positions
2mm
3mm
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Simulation
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Simulation
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5 10 15 20 25 30 35 40 45 50 55
400
500
600
700
800
900
Times (s)
Te
mp
era
ture
(K
)Times-Temperature
K.C.Mills Parameters
H.Paydas Parameters
Experimental
Validation
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Validation
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Section 1
Section 2
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Validation
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Section 1
Section 2
2530μm
2840μm
hDL
hDL (Dilution depth)=480μm
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Validation
²
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Allotropic Transformation (β→α)
Section 1
hHAZ = 1500μm → 1600μm Dilution depth = 450μm → 500μm
hHAZ = 1750μm
Micrographe - H.Paydas
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Limitation
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Temps [s] Diagramme de refroidissement – Ahmed et al.
Tem
pér
atu
re [
°C]
Carte de dureté – CTL – Paydas et al.
𝛼 𝛼
Microstructure analysis Numerical study
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Conclusion & Perspectives
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• Simulation results by Lagamine in line with experimental observations. • Time consuming < 2days for one layers (7 tracks)
Resume
• Fully couple thermo-mechanical analysis. • Define the links between the process parameters and the
microstructure.
Perpective