基于流体力学的金属增材制造过程仿真研究（英文版第二版）

References

9.4 Conclusions

9.3.3 Experimental results

9.3.2 Morphology observation by 3D optical profiler

9.3.1 Sample fabrication

9.3 Experimental methods

9.2.3 Simulation results

9.2.2 Governing equations and boundary conditions

9.2.1 Physical model and assumptions

9.2 Model and theoretical calculation

9.1 Introduction

Chapter 9 Investigation of laser polishing of four Laser-based Powder Bed Fusion alloy samples

References

8.5 Conclusions

8.4 Numerical results and discussion

8.3.5 Boundary conditions

8.3.4 Level-set method

8.3.3 Latent heat of phase change

8.3.2 Gaussian heat source

8.3.1 Simulation model

8.3 Model and simulation

8.2.2 Detection of porosity by mirco-CT

8.2.1 Sample preparation

8.2 Experimental procedures

8.1 Introduction

Chapter 8 Evolution of multi-pores in Ti-6Al-4V/Al-Si-10Mg alloy during laser post-processing

References

7.5 Conclusions

7.4 Numerical results and discussion

7.3.4 Marangoni effect surface tension and recoil pressure

7.3.3 Thermal boundary conditions

7.3.2 Moving Gaussian heat source

7.3.1 Numerical model

7.3 Modeling and simulation

7.2.2 Determination of porosity by micro-CT

7.2.1 Sample fabrication

7.2 Experimental procedures

7.1 Introduction

Chapter 7 Influence of laser post-processing on pore evolution of Ti-6Al-4V alloy by Laser-based Powder Bed Fusion

References

6.4 Conclusions

6.3.3 Surface deformation of the sample

6.3.2 Lorentz force in the MP

6.3.1 Velocity field in the molten pool

6.3 Results

6.2.6 Lorentz force

6.2.5 Phase-change material

6.2.4 Marangoni convection

6.2.3 Heat transfer conditions

6.2.2 Mesh model and basic assumptions

6.2.1 Modeling of L-PBF

6.2 Modeling and simulation

6.1 Introduction

Chapter 6 Simulation of surface deformation control during Laser-basedPowder Bed Fusion Al-Si-10Mg powder using an external magnetic field

References

5.5 Conclusions

5.4.3 Development of the evaporation region

5.4.2 Formation and solidification of the molten pool

5.4.1 Surface temperature distribution and morphology

5.4 Results and discussions

5.3 Experimental procedures

5.2.6 Mesh generation

5.2.5 Boundary conditions setup

5.2.4 Phase change

5.2.3 Heat source model

5.2.2 Governing equations

5.2.1 Model establishing and assumptions

5.2 Modeling approach and numerical simulation

5.1 Introduction

Chapter 5 Evolution of molten pool during Laser-based Powder Bed Fusion of Ti-6Al-4V

References

4.4 Summary and conclusions

4.3.3 Effect of initial particle velocity

4.3.2 Effect of outlet flow rate

4.3.1 Effect of pipe diameter

4.3 Simulation results and discussions

4.2.2 Numerical model of the L-PBF printer

4.2.1 Geometric model of the L-PBF printer

4.2 Simulation model of the L-PBF printer

4.1 Introduction

Chapter 4 Numerical investigation of controlling spatters with negative pressure pipe in Laser-based Powder Bed Fusion process

References

3.4 Summary and conclusions

3.3.2 Influence of the fluid stabilizing cover on particles distribution and removing rate

3.3.1 Influence of the fluid stabilizing cover on the flow field

3.3 Simulation results and discussions

3.2.4 Model of the fluid stabilizing cover and particles

3.2.3 Mesh of the L-PBF printer with a fluid stabilizing cover

3.2.2 Numerical model of printer with a fluid stabilizing cover

3.2.1 Geometry of the L-PBF printer with a fluid stabilizing cover

3.2 Simulation model of the L-PBF printer

3.1 Introduction

Chapter 3 Investigation of optimizing the flow field with fluid cover in Laser-based Powder Bed Fusion manufacturing process

References

2.4 Conclusions

2.3.3 Distribution of spatter particles

2.3.2 Distribution of the temperature field

2.3.1 Distribution of the flow field

2.3 Simulation results

2.2.3 Numerical model of the L-PBF printer

2.2.2 Geometric model of the L-PBF printer

2.2.1 Problem description

2.2 Simulation model of the L-PBF printer

2.1 Introduction

Chapter 2 Investigation of the flow field in Laser-based Powder Bed Fusion manufacturing

1.3 Outline

1.2 Motivation

1.1 Background

Chapter 1 Introduction

Preface

内容简介

版权信息

封面

封面

版权信息

内容简介

Preface

Chapter 1 Introduction

1.1 Background

1.2 Motivation

1.3 Outline

Chapter 2 Investigation of the flow field in Laser-based Powder Bed Fusion manufacturing

2.1 Introduction

2.2 Simulation model of the L-PBF printer

2.2.1 Problem description

2.2.2 Geometric model of the L-PBF printer

2.2.3 Numerical model of the L-PBF printer

2.3 Simulation results

2.3.1 Distribution of the flow field

2.3.2 Distribution of the temperature field

2.3.3 Distribution of spatter particles

2.4 Conclusions

References

Chapter 3 Investigation of optimizing the flow field with fluid cover in Laser-based Powder Bed Fusion manufacturing process

3.1 Introduction

3.2 Simulation model of the L-PBF printer

3.2.1 Geometry of the L-PBF printer with a fluid stabilizing cover

3.2.2 Numerical model of printer with a fluid stabilizing cover

3.2.3 Mesh of the L-PBF printer with a fluid stabilizing cover

3.2.4 Model of the fluid stabilizing cover and particles

3.3 Simulation results and discussions

3.3.1 Influence of the fluid stabilizing cover on the flow field

3.3.2 Influence of the fluid stabilizing cover on particles distribution and removing rate

3.4 Summary and conclusions

References

Chapter 4 Numerical investigation of controlling spatters with negative pressure pipe in Laser-based Powder Bed Fusion process

4.1 Introduction

4.2 Simulation model of the L-PBF printer

4.2.1 Geometric model of the L-PBF printer

4.2.2 Numerical model of the L-PBF printer

4.3 Simulation results and discussions

4.3.1 Effect of pipe diameter

4.3.2 Effect of outlet flow rate

4.3.3 Effect of initial particle velocity

4.4 Summary and conclusions

References

Chapter 5 Evolution of molten pool during Laser-based Powder Bed Fusion of Ti-6Al-4V

5.1 Introduction

5.2 Modeling approach and numerical simulation

5.2.1 Model establishing and assumptions

5.2.2 Governing equations

5.2.3 Heat source model

5.2.4 Phase change

5.2.5 Boundary conditions setup

5.2.6 Mesh generation

5.3 Experimental procedures

5.4 Results and discussions

5.4.1 Surface temperature distribution and morphology

5.4.2 Formation and solidification of the molten pool

5.4.3 Development of the evaporation region

5.5 Conclusions

References

Chapter 6 Simulation of surface deformation control during Laser-basedPowder Bed Fusion Al-Si-10Mg powder using an external magnetic field

6.1 Introduction

6.2 Modeling and simulation

6.2.1 Modeling of L-PBF

6.2.2 Mesh model and basic assumptions

6.2.3 Heat transfer conditions

6.2.4 Marangoni convection

6.2.5 Phase-change material

6.2.6 Lorentz force

6.3 Results

6.3.1 Velocity field in the molten pool

6.3.2 Lorentz force in the MP

6.3.3 Surface deformation of the sample

6.4 Conclusions

References

Chapter 7 Influence of laser post-processing on pore evolution of Ti-6Al-4V alloy by Laser-based Powder Bed Fusion

7.1 Introduction

7.2 Experimental procedures

7.2.1 Sample fabrication

7.2.2 Determination of porosity by micro-CT

7.3 Modeling and simulation

7.3.1 Numerical model

7.3.2 Moving Gaussian heat source

7.3.3 Thermal boundary conditions

7.3.4 Marangoni effect surface tension and recoil pressure

7.4 Numerical results and discussion

7.5 Conclusions

References

Chapter 8 Evolution of multi-pores in Ti-6Al-4V/Al-Si-10Mg alloy during laser post-processing

8.1 Introduction

8.2 Experimental procedures

8.2.1 Sample preparation

8.2.2 Detection of porosity by mirco-CT

8.3 Model and simulation

8.3.1 Simulation model

8.3.2 Gaussian heat source

8.3.3 Latent heat of phase change

8.3.4 Level-set method

8.3.5 Boundary conditions

8.4 Numerical results and discussion

8.5 Conclusions

References

Chapter 9 Investigation of laser polishing of four Laser-based Powder Bed Fusion alloy samples

9.1 Introduction

9.2 Model and theoretical calculation

9.2.1 Physical model and assumptions

9.2.2 Governing equations and boundary conditions

9.2.3 Simulation results

9.3 Experimental methods

9.3.1 Sample fabrication

9.3.2 Morphology observation by 3D optical profiler

9.3.3 Experimental results

9.4 Conclusions

References