內容大鋼
本書針對金屬增材製造加工過程進行系統研究，基於計算流體動力學方法研究金屬增材製造工藝過程中的流體問題。第1章為緒論。第2?4章研究金屬增材製造印表機腔體內部流場及顆粒分佈特性，並設計新穎的流體罩和負壓管分別對印表機腔體內部流場進行優化及對濺射顆粒進行清除。第5?9章主要研究金屬增材製造加工過程中熔池特性，其中，第5章研究金屬熔池動力學特性，第6章研究外加磁場對金屬增材製造過程中熔池及凝固過程的影響，第7章和第8章研究金屬增材製造過程中工件內部單氣孔缺陷和多氣孔缺陷的演化過程。第9章研究金屬增材製造工件激光清洗工藝，以控制工件表面粗糙度。
本書內容系統全面、新穎獨特，面向從事增材製造和激光加工等相關領域的科研人員，以及關注先進位造、智能製造的專家學者和普通讀者。
目錄
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 L-PBF printer
3.2.1 Geometry of 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 L-PBF printer with a fluid stabilizing cover
3.2.4 Model of the fluid stabilizing cover and particles
3.3 Simulation results and discussion
3.3.1 Influence of the fluid stabilizing cover on the flow field
3.3.2 Influence of fluid stabilizing cover on particle 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 L-PBF printer
4.2.1 Geometric model of L-PBF printer
4.2.2 Numerical model of 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-based Powder 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 obseryation by 3D optical profiler
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