更新时间：2024-03-22 20:08:32
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
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
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
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
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
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
