"The principles and applications of friction-stir welding, a solid-state metal joining widely used to weld aluminum and its composites, are assessed. Friction stir processing, a novel process developed for microstructural modification of metallic materials, is also discussed. Academic studies and current sectoral applications of friction stir welding in shipbuilding are examined in detail. In addition, general literature reviews related to the joining of aluminum and steel with friction stir welding are explored. The authors examine past research comparing the friction stir welding and submerged friction stir welding, use of different medium under which the welding is performed, design and process parameters, applications and possibility of future research. In the closing study, a microstructural and statistical approach is performed to obtain a high strength welded joint in the dissimilar friction stir welding of AA 7075 and AA 6013 aluminum alloys"-- Provided by publisher Contents 7 Preface 9 Chapter 1 13 Friction-Stir Welding: Principles and Applications 13 Abstract 13 1. Introduction 14 1.1. FSW Tool 16 1.2. FSW Tool Material 17 1.2.1. HCHCr 17 1.2.2. OHNS 17 1.2.3. H13 Steel 18 1.3. FSW Tool Profile 18 1.3.1. Tool D/d Ratio 20 1.3.2. Tool Shoulder 20 1.3.3. Tool Pin or Probe 21 2. Weldments 21 2.1. Ferrous Materials 22 2.2. Non-Ferrous Materials 22 3. Microstructure Classification 22 3.1. Unaffected Material or Parent Material 22 3.2. Heat Affected Zone (HAZ) 23 3.3. Thermo-Mechanically Affected Zone (TMAZ) 23 3.4. Weld Nugget 23 4. Parameters in FSW 24 4.1. Tool Axial Load 24 4.2. Tool Travel Speed 24 4.3. Tool Rotational Speed 24 4.4. Welding Forces 25 4.5. Factors Affecting Weld Quality 26 5. Thermal and Stress Distribution 26 5.1. Tool Temperature 26 5.2. Weldment Temperature 27 5.3. Stress in Tool and Weldment 28 6. Working Principle 28 6.1. Advantages 30 6.2. Disadvantages 30 7. Applications 31 7.1. Shipbuilding and Marine Industries 31 7.2. Aerospace Industry 31 7.3. Railway Industry 31 7.4. Land Transportation 32 7.5. Construction Industry 32 7.6. Electrical Industry 32 7.7. Other Industry Sectors 32 Conclusion 32 References 33 Biographical Sketch 35 Chapter 2 39 Friction Stir Welding Usage in Shipbuilding Industry 39 Abstract 39 1. Introduction 40 2. Current Industrial Use of and Academic Studies on FSW in the Shipbuilding Industry 43 2.1. Examination of FSW’s Current Industrial Applications 43 2.2. Academic Studies on the Use of FSW in Shipbuilding 45 3. General Literature Review on the Joining of Aluminum and Steel with FSW 49 4. Suggestions for Using FSW in Shipbuilding Industry 54 Conclusion 57 References 59 Chapter 3 75 Submerged Friction Stir Welding 75 Abstract 75 Introduction 76 Methods and Materials 77 Experimental Setup and Machine Used 77 Friction Stir Welding Tool 78 Working Medium 80 Process Parameters 80 Welded Materials 81 Mechanical Properties of the Submerged Friction Welded Joints 81 Other Properties under Examination 83 Microstructural Properties of the Submerged Friction Welded Joints 84 Thermal Aspects of SFSW 85 Defects in SFSW 86 Finite Element Method Based Simulation of SFSW 87 Mathematical Modeling and Optimization in SFSW 89 Conclusion 89 References 90 Chapter 4 97 An Experimental Study for Dissimilar Friction Stir Welded of AA 7075-T651 and AA 6013-T6 97 Abstract 97 Introduction 98 Methods 100 Results and Dıscussıons 102 Microstructural Investigations of Welded Joints 102 Investigating the FSW Process Using Taguchi Method 113 Conclusion 114 Acknowledgments 115 References 116 Index 119 Blank Page 2 Blank Page 123
