电子工业出版社-网上书店

本书针对金属增材制造加工过程进行系统研究，基于计算流体动力学方法研究金属增材制造工艺过程中的流体问题。第1章为绪论。第2～4章研究金属增材制造打印机腔体内部流场及颗粒分布特性，并设计新颖的流体罩和负压管分别对打印机腔体内部流场进行优化及溅射颗粒清除。第5～9章主要研究金属增材制造加工过程中熔池特性，其中，第5章研究金属熔池动力学特性，第6章研究外加磁场对金属增材制造过程中熔池及凝固过程的影响，第7章和第8章研究金属增材制造过程中工件内部单气孔缺陷和多气孔缺陷的演化过程。第9章研究金属增材制造工件激光清洗工艺，以控制工件表面粗糙度。本书内容系统全面，新颖独特，面向从事增材制造和激光加工等相关领域的科研人员，以及关注先进制造、智能制造的专家学者和普通读者。

Chapter 1  Introduction	1
1.1  Background	2
1.2  Motivation	3
1.3  Outline	4
Chapter 2  Investigation of the flow field in Laser-based Powder Bed Fusion 
manufacturing	5
2.1  Introduction	7
2.2  Simulation model of the L-PBF printer	10
2.2.1  Problem description	10
2.2.2  Geometric model of the L-PBF printer	11
2.2.3  Numerical model of the L-PBF printer	12
2.3  Simulation results	16
2.3.1  Distribution of the flow field	16
2.3.2  Distribution of the temperature field	21
2.3.3  Distribution of spatter particles	23
2.4  Conclusions	28
References	30
Chapter 3  Investigation of optimizing the flow field with fluid cover in 
Laser-based Powder Bed Fusion manufacturing process	33
3.1  Introduction	35
3.2  Simulation model of L-PBF printer	37
3.2.1  Geometry of L-PBF printer with a fluid stabilizing cover	37
3.2.2  Numerical model of printer with a fluid stabilizing cover	37
3.2.3  Mesh of L-PBF printer with a fluid stabilizing cover	39
3.2.4  Model of the fluid stabilizing cover and particles	40
3.3  Simulation results and discussion	43
3.3.1  Influence of the fluid stabilizing cover on the flow field	43
3.3.2  Influence of fluid stabilizing cover on particle distribution and removing rate	47
3.4  Summary and conclusions	51
References	53
Chapter 4  Numerical investigation of controlling spatters with negative pressure 
pipe in Laser-based Powder Bed Fusion process	54
4.1  Introduction	56
4.2  Simulation model of L-PBF printer	59
4.2.1  Geometric model of L-PBF printer	59
4.2.2  Numerical model of L-PBF printer	61
4.3  Simulation results and discussions	64
4.3.1  Effect of pipe diameter	68
4.3.2  Effect of outlet flow rate	70
4.3.3  Effect of initial particle velocity	74
4.4  Summary and conclusions	76
References	78
Chapter 5  Evolution of molten pool during Laser-based Powder Bed Fusion of 
Ti-6Al-4V	80
5.1  Introduction	82
5.2  Modeling approach and numerical simulation	85
5.2.1  Model establishing and assumptions	85
5.2.2  Governing equations	87
5.2.3  Heat source model	87
5.2.4  Phase change	88
5.2.5  Boundary conditions setup	89
5.2.6  Mesh generation	90
5.3  Experimental procedures	91
5.4  Results and discussions	92
5.4.1  Surface temperature distribution and morphology	92
5.4.2  Formation and solidification of the molten pool	94
5.4.3  Development of the evaporation region	98
5.5  Conclusions	101
References	103
Chapter 6  Simulation of surface deformation control during Laser-based 
Powder Bed Fusion Al-Si-10Mg powder using an external magnetic field	107
6.1  Introduction	109
6.2  Modeling and simulation	112
6.2.1  Modeling of L-PBF	112
6.2.2  Mesh model and basic assumptions	113
6.2.3  Heat transfer conditions	114
6.2.4  Marangoni convection	115
6.2.5  Phase-change material	115
6.2.6  Lorentz force	116
6.3  Results	118
6.3.1  Velocity field in the molten pool	118
6.3.2  Lorentz force in the MP	121
6.3.3  Surface deformation of the sample	123
6.4  Conclusions	127
References	128
Chapter 7  Influence of laser post- processing on pore evolution of Ti-6Al-4V 
alloy by Laser-based Powder Bed Fusion	131
7.1  Introduction	133
7.2  Experimental procedures	136
7.2.1  Sample fabrication	136
7.2.2  Determination of porosity by micro-CT	137
7.3  Modeling and simulation	140
7.3.1  Numerical model	140
7.3.2  Moving Gaussian heat source	143
7.3.3  Thermal boundary conditions	143
7.3.4  Marangoni effect, surface tension and recoil pressure	144
7.4  Numerical results and discussion	145
7.5  Conclusions	152
References	153
Chapter 8  Evolution of multi pores in Ti-6Al-4V/Al-Si-10Mg alloy during laser 
post-processing	157
8.1  Introduction	159
8.2  Experimental procedures	162
8.2.1  Sample preparation	162
8.2.2  Detection of porosity by mirco-CT	162
8.3  Model and simulation	165
8.3.1  Simulation model	165
8.3.2  Gaussian heat source	167
8.3.3  Latent heat of phase change	168
8.3.4  Level-set method	169
8.3.5  Boundary conditions	169
8.4  Numerical results and discussion	171
8.5  Conclusions	177
References	179
Chapter 9  Investigation of laser polishing of four Laser-based Powder Bed 
Fusion alloy samples	182
9.1  Introduction	184
9.2  Model and theoretical calculation	188
9.2.1  Physical model and assumptions	188
9.2.2  Governing equations and boundary conditions	190
9.2.3  Simulation results	192
9.3  Experimental methods	195
9.3.1  Sample fabrication	195
9.3.2  Morphology observation by 3D optical profiler	198
9.3.3  Experimental results	199
9.4  Conclusions	206
References	208

Additive Manufacturing (AM) process is a widely used technology for the design and production of high-performance components. The layers designed by computer are gradually added to construct 3D parts in AM process. This unique process can be used to manufacture complex or customized parts. 
The metal additive manufacturing process is studied in this book. The fluid problem in the metal additive manufacturing process is investigated based on the Computational Fluid Dynamics (CFD) method. Chapter 1 is the introduction. Chapters 2 to 4 study the internal flow field and spatter particles’ tracks in the metal additive manufacturing printer, and design an innovative fluid cover to optimize the internal flow field of the printer and employ a negative pressure tube to remove spatter particles. Chapters 5 to 9 mainly study the characteristics of the molten pool in the metal additive manufacturing process. Chapter 5 studies the dynamic characteristics of the molten pool. Chapter 6 studies the effect of the external magnetic field on the molten pool and the solidification process in additive manufacturing process. Chapter 7 and Chapter 8 study the evolution processes of single pore defects and multi-pores defects inside the workpiece in the metal additive manufacturing process. Chapter 9 studies the laser polishing processes of metal additive manufacturing workpieces to control the surface roughness.
Mr. Jiayue Wang for Chapter 2, Mr. Liang Zhao for Chapter 3, Mr. Lei Wang for Chapter 4, Mr. Tao Zhang for Chapter 5, Mr. Liwei Chen for Chapter 6, Mr. Bingnan Shen for Chapter 7, Mr. Leilei Shi for Chapter 8, Mr. Dongqi Zhang for Chapter 9, Mr. Jiantao Zhou is responsible for the organization and verification of the book. Professor Hui Li and Sheng Liu contribute to the numerical simulation and experimental method.
This work was supported by the National Key Research and Development Program of China（2017YFB1103900）; the Key-Area Research and Development Program of Guangdong Province（2018B090905001）; the Natural Science Foundation of Guangdong Province（2018A030313044）; the Science and Technology Program of Shenzhen（JCYJ20170816171733384）.

本书配套资源下载

对不起，暂无音视频资源！

基于流体力学的金属增材制造过程仿真研究