Lightweight alloys for aerospace application : proceedings of symposium sponsored by the Non-Ferrous Metals Committee of the Structural Materials Division (SMD) of TMS (The Minerals, Metals & Materials Society), held at the TMS Annual Meeting in New Orlea

this Proceedings Volume From The 2001 Tms Annual Meeting & Exhibition Covers Advances Made In The Area Of Scientific Understanding Of Technological Application Of Lightweight Alloys. Papers Focus On Fundamental Science As Well As Application And Concentrate On Scientific Advances In Aluminum, Magnesium, Titanium, And Beryllium Alloys And Their Composites. Processing, Structure-property Relationship, Failure Mechanisms, And Advanced Joining Themes Are Also Discussed. Cover 1 Title Page 5 Copyright Page 6 TABLE OF CONTENTS 7 Foreword and Acknowledgements 11 ALUMINUM ALLOYS 13 Precipitation Hardening-The Oldest Nanotechnology 14 The Role of Ledge Nucleation/Migration in Ω Plate Thickening Behaviour in Al-Cu-Mg-Ag Alloys 26 Improving Recrystallization Resistance in Wrought Aluminum Alloys with ScandiumAddition 38 Application of 3D Digital Image Processing to Quantify Fracture Micro- Mechanisms in Al 7050 Alloys 54 On the Effect of Stress on Nucleation, Growth, and Coarsening of Precipitates in Age-Hardenable Alloys 64 Hot Deformation Mode and TMP in Aluminum Alloys 76 Microstructural Characterization of Friction Stir Welds 90 Deformation, Fracture and Fatigue in a Dispersion Strengthened Aluminum Alloy 100 The Effect of Retrogression and Reaging on 7249 Aluminum Alloy 112 ALUMINUM -LITHIUM ALLOYS 121 Grain Boundary Corrosion and Stress Corrosion Cracking Studies of Al-Li-Cu Alloy AF/C458 122 Localized Corrosion Mechanisms of Al-Li-Cu Alloy AF/C458 After Interrupted Quenching from Solutionizing Temperatures 132 Aluminum-Lithium Alloys 141 Effect of Friction Stir Welding on the Superplastic Behavior of Weldalite Alloys 154 On the Effect of Thermal Exposure on the Mechanical Properties of 2297 Plates 164 TITANIUM ALLOYS 173 The Effect of Crystal Orientation and Boundary Misorientation on Tensile Boundary Cavitation During Hot Tension Deformation of Ti-6Al-4V 174 Processing and Properties of Gamma Titanium Aluminides and Their Potential for Aerospace Applications 184 Metallurgical and Fabrication Factors Relevant to Fracture Mechanisms of Titanium-Aluminide Intermetallic Alloys 196 Dwell-Fatigue Behavior of Ti-6Al-2Sn-4Zr-2Mo-0.1 Si Alloy 206 Characterization of Microstructural Evolution in a Ti-6Al-4V Friction Stir Weld 222 Microstructural Evolution During Hot Working of Ti-6 Al-4V at High Strain Rates 232 The Application of a Novel Technique to Examine Sub-ß Transus Isothermal Forging of Titanium Alloys 242 Stress Corrosion Cracking of a-Ti in a Methanold Solution 254 Investment Casting of Titanium Alloys with CaO Crucible and CaZrO3 Mold 264 COMPOSITES 273 Compressive Behavior of Ti-6Al-4V/TiC Layered Composites: Experiments and Modeling 274 High Ductility Cast Aluminum Beryllium Alloys 286 Characterization of Reinforcing Particle Size Distribution in a Friction Stir Welded Al-SiC Extrusion 296 In-Situ Formation of AlN Reinforced Al Alloy Composites Using Ammonia 308 Author Index 321 Subject Index 323