| Abstract | 第5页 |
| 摘要 | 第6-11页 |
| 1 Introduction | 第11-22页 |
| 1.1 Research Background of the Dissertation | 第11页 |
| 1.2 Laser Additive Manufacturing (LAM) | 第11-13页 |
| 1.2.1 Advantages of Laser Additive Manufacturing | 第12页 |
| 1.2.2 Laser Additive Manufacturing Process Parameters | 第12页 |
| 1.2.3 Fundamentals of LAM | 第12-13页 |
| 1.2.4 Specific Features of Laser Additive Manufacturing | 第13页 |
| 1.3 Current Research Status of Correlated Field | 第13-20页 |
| 1.3.1 Research Status on Thin-wall Part | 第13-15页 |
| 1.3.2 Influence of Process Parameters on Shape Quality of Single-bead Wall | 第15-17页 |
| 1.3.3 Influence of Process Parameters on Build Height of Single-bead Stacks | 第17-19页 |
| 1.3.4 Effects of Standoff Distant on the Powder Efficiency | 第19-20页 |
| 1.4 Research Purpose and Significance | 第20-21页 |
| 1.5 Research Contents of This Dissertation | 第21-22页 |
| 2 Key Technology of Laser Additive Manufacturing | 第22-31页 |
| 2.1 LAM Process Conjunction Engineering Fields | 第22-23页 |
| 2.2 Laser Additive Manufacturing Equipment | 第23-25页 |
| 2.2.1 Lasers | 第24页 |
| 2.2.2 Powder Feeder | 第24页 |
| 2.2.3 Positioning Devices | 第24-25页 |
| 2.3 Laser Additive Manufacturing Parameters | 第25-26页 |
| 2.4 Solidification in LAM | 第26-27页 |
| 2.5 Microstructural Evolution in Stainless Steel Depositions | 第27-28页 |
| 2.6 Finite Element Method in Laser Additive Manufacturing | 第28-29页 |
| 2.7 COMSOL Multiphysics Introduction | 第29-31页 |
| 3 Finite Element Analysis of the Heat Load on Sloped Thin-walled parts Produced byTwo Kinds of Slicing Trajectories | 第31-45页 |
| 3.1 Simulation System and Boundary | 第31-34页 |
| 3.1.1 Setup of Simulation System | 第31-32页 |
| 3.1.2 Physics and Governing Equations | 第32-33页 |
| 3.1.3 Simulation Assumption and Boundary Conditions | 第33页 |
| 3.1.4 Materials | 第33-34页 |
| 3.2 Simulation of Heat Load on Part produced by Fixed Offset Distant | 第34-36页 |
| 3.2.1 Geometric | 第34-35页 |
| 3.2.3 Meshing | 第35-36页 |
| 3.3 Simulation of Heat Load on Part Produced by Linearly Varied of fset Distant | 第36-38页 |
| 3.3.1 Geometric | 第36-37页 |
| 3.3.2 Meshing | 第37-38页 |
| 3.4 Results and Comparison | 第38-45页 |
| 4 Experimental and Results of Sloped Thin-walled parts Produced by Two Kinds ofSlicing Trajectories | 第45-53页 |
| 4.1 Experimental Parameter and Equipment | 第45-48页 |
| 4.1.1 Materials | 第45页 |
| 4.1.2 Laser Direct Metal Deposition Systems | 第45-46页 |
| 4.1.3 Experimental Parameter | 第46页 |
| 4.1.4 Geometric of Thin-walled Parts | 第46-48页 |
| 4.2 Samples Preparation | 第48页 |
| 4.3 Experimental Results | 第48-53页 |
| 4.3.1 Hardness | 第49-51页 |
| 4.3.2 Tensile Properties | 第51-53页 |
| Conclusions | 第53-54页 |
| References | 第54-57页 |
| Publications during Master Period | 第57-58页 |
| Acknowledgements | 第58-60页 |
