| Abstract | 第4-6页 |
| 摘要 | 第7-13页 |
| Chapter 1 Introduction | 第13-43页 |
| 1.1 General background | 第13-14页 |
| 1.2 Beta Titanium Alloys | 第14-19页 |
| 1.2.1 Metallurgy and Processing | 第15-18页 |
| 1.2.2 Tensile Properties | 第18-19页 |
| 1.3 Context of Ti+Ti B+TiC research | 第19-22页 |
| 1.3.1 The crystalline structure of Ti B | 第20-21页 |
| 1.3.2 The Ti-TiC phase diagram | 第21-22页 |
| 1.4 The choice of titanium matrix composites reinforcement | 第22-24页 |
| 1.5 Main fabrication methods | 第24-28页 |
| 1.5.1 Solid-liquid reaction process | 第24-27页 |
| 1.5.2 Solid-solid reaction process | 第27-28页 |
| 1.6 Current research state of beta titanium a lloy | 第28-39页 |
| 1.6.1 Effect of boron and carbon addition of beta titanium alloys | 第28-30页 |
| 1.6.2 TB20 titanium alloy | 第30-33页 |
| 1.6.3 Dynamic analysis of grain growth of T B20 titanium alloy | 第33-37页 |
| 1.6.4 Textures in Titanium Alloys | 第37-39页 |
| 1.7 Applications | 第39-41页 |
| 1.8 The main contents of the dissertation | 第41-43页 |
| Chapter 2 M aterials and Methods | 第43-51页 |
| 2.1 Experimental procedure | 第43-46页 |
| 2.1.1 Fabrication of the matrix alloy | 第43-44页 |
| 2.1.2 Fabrication of the (Ti B+Ti B)/T B20 composite | 第44-46页 |
| 2.2 Heat treatments | 第46-47页 |
| 2.2.1 β transus temperatures | 第46-47页 |
| 2.2.2 Heat treatments 1 | 第47页 |
| 2.2.3 Heat treatments 2 | 第47页 |
| 2.2.4 Heat treatments 3 | 第47页 |
| 2.3 Hot rolling | 第47-48页 |
| 2.4 Structural analysis of materials | 第48-50页 |
| 2.4.1 X-ray diffraction analyses (XRD) | 第48页 |
| 2.4.2 Microstructure analysis | 第48-50页 |
| 2.5 Experimental tensile properties | 第50-51页 |
| Chapter 3 Effect of Heat Treatment on Microstructure and TensileProperties of the TB20 Alloy | 第51-65页 |
| 3.1 Introduction | 第51-52页 |
| 3.2 As-forged and solution treated conditions | 第52-55页 |
| 3.3 Effect of aging time | 第55-58页 |
| 3.4 α+β & β solution treatment plus aged conditions | 第58-61页 |
| 3.5 Microstructural observations and tensile results | 第61-64页 |
| 3.6 Summary | 第64-65页 |
| Chapter 4 M icrostructure and M echanical Properties of In Situ (Ti B+TiC) Reinforced TB20 Alloy | 第65-83页 |
| 4.1 Introduction | 第65-66页 |
| 4.2 In situ reaction mechanisms of Ti B and TiC | 第66-67页 |
| 4.3 Experimental procedure | 第67页 |
| 4.4 The microstructures of the as-cast (Ti B+TiC)/TB20 composite | 第67-69页 |
| 4.5 Microstructural observation of as forged | 第69-74页 |
| 4.6 Tensile properties | 第74-76页 |
| 4.7 Fractography | 第76-78页 |
| 4.8 Analysis of effects forging on microstructure and prop erties | 第78-81页 |
| 4.9 Summary | 第81-83页 |
| Chapter 5 Improvement of the Mechanical Properties of the Compositeafter (α +β ) Field Heat Treatment | 第83-96页 |
| 5.1 Introduction | 第83-84页 |
| 5.2 Experimental procedure | 第84页 |
| 5.3 Microstructure of as forged composite | 第84-85页 |
| 5.4 Effects on solution temperature, aging temperature and aging time | 第85-86页 |
| 5.5 Solution treatment at 780°C followed by aging | 第86-89页 |
| 5.6 Elastic modulus of composite | 第89-90页 |
| 5.7 Analysis of the heat treatment effects on microstructure and properties ofcomposite | 第90-94页 |
| 5.8 Summary | 第94-96页 |
| Chapter 6 M icrostructures and Mechanical Properties of as -rolled Sheets | 第96-116页 |
| 6.1 Introduction | 第96-97页 |
| 6.2 Materials and methods | 第97-98页 |
| 6.3 Rolled alloy sheet s | 第98-105页 |
| 6.3.1 Microstructure of as rolled alloy | 第98-100页 |
| 6.3.2 Microstructure of hot rolled alloy after aging treatment | 第100-102页 |
| 6.3.3 Tensile properties of as rolled alloy | 第102-103页 |
| 6.3.4 Analysis of effects rolling and heat treatment on microstructureand properties of the al loy | 第103-105页 |
| 6.4 Microstructure of as rolled of composite | 第105-110页 |
| 6.5 Fractography of fractured alloy samples | 第110-111页 |
| 6.6 Comparative between effects of forging and hot rolling | 第111-114页 |
| 6.7 Summary | 第114-116页 |
| Conclusion | 第116-118页 |
| 结论 | 第118-120页 |
| This study has made the following innovative results | 第120页 |
| 本论文研究取得了以下创新性成果 | 第120-121页 |
| References | 第121-137页 |
| Papers published in the period of Ph.D. education | 第137-139页 |
| Acknowledgement | 第139-140页 |
| Curriculum Vitae | 第140-141页 |
