航空用鋁鋰合金超塑成形及成形後機械性質之評估

• Main Authors: CHEN, ZHONG-RONG, 陳宗榮
• Other Authors: HUANG, ZHI-QING
• Format: Others
• Language: en_US
• Published: 1992
• Online Access: http://ndltd.ncl.edu.tw/handle/50735656812105153097

碩士 === 國立中山大學 === 材料科學工程研究所 === 80 === LIST OF TABLES LIST OF FIGURES ACKNOWLEDGEMENTS ABSTRACT 論文摘要 CHAPTER 1. INTRODUCTION 1.1 HISTORICAL BACKGROUND 1.2 CATEGORIES OF SUPERPLASTICITY 1.3 PREREQUISITES FOR STRUCTURAL SUPERPLASTICITY 1.3.1 SIZE AND SHAPE OF GRAINS 1.3.2 PRESENCE OF SECOND PHASE STRENGTH OF SECOND PHASE 1.3.3 STRENGTH OF SECOND PHASE 1.3.4 SIZE AND DISTRIBUTION OF SECOND PHASE 1.3.5 NATURE OF GRAIN BOUNDARY STRUCTURE 1.3.6 MOBILITY OF GRAIN BOUNDARIES 1.3.7 GRAIN BOUNDARIES AND THEIR RESISTANCE OF TENSILE SEPARATION 1.4 GRAIN BOUNDARY SLIDING AND ITS ACCOMMODATION MECHANISMS 1.5 TYPES OF SUPERPLASTIC FORMING 1.5.1 BLOW FORMING 1.5.2 VACUUM FORMING 1.5.3 THERMO-FORMING 1.5.4 DEEP DRAWING 1.5.5 FORGING 1.5.6 EXTRUSION 1.5.7 DIE-LESS DRAWING 1.5.8 SPF/DB 1.6 FORMING PARAMETERS 1.6.1 FORMING TEMPERATURE 1.6.2 FORMING PRESSURE 1.6.3 BACK PRESSURE 1.6.4 LUBRICATION CHAPTER 2. THEORETICAL ANALYSIS 2.1 MATERIAL BEHAVIOR OF THE 8090 AL-LI ALLOY 2.2 THEORETICAL ANALYSIS OF SUPERPLASTIC FORMING 2.2.1 FREE BULGING IN A CIRCULAR OPEN-DIE 2.2.1 FORMING IN THE CIRCULAR CLOSE-DIE 2.3 COMPUTER SIMULATIONS CHAPTER 3. EXPERIMENTAL PROCEDURES 3.1 SPECIMENS 3.1.1 MATERIALS 3.1.2 SIZE OF SPECIMENS 3.2 FORMING INSTRUMENTS 3.3 FORMING DIES 3.4 WORKING GAS AND FORMING PRESSURE 3.4.1 FREE BULGING IN THE CIRCULAR OPEN-DIE 3.4.2 FORMING IN THE CIRCULAR CLOSE-DIE 3.5 FORMING PROCEDURES 3.6 LUBRICANTS USED IN THE FORMING 3.7 EXAMINATIONS OF THE POST-FORMING MECHANICAL PROPERTIES 3.7.1 TENSILE TEST SPECIMEN 3.7.2 T5 AND T6 HEAT TREATMENTS 3.8 MICROSTRUCTURAL OBSERVATIONS CHAPTER 4. RESULTS 4.1 FREE BULGING IN THE CIRCULAR OPEN-DIE 4.1.1 BEST FORMING CONDITIONS FOR FREE BULGING 4.1.2 STRAIN DISTRIBUTIONS IN THE FREE BULGED SPECIMENS 4.1.3 THICKNESS DISTRIBUTIONS IN THE FREE BULGED SPECIMENS 4.2 FORMING IN THE CIRCULAR CLOSE-DIE 4.2.1 STRAIN DISTRIBUTIONS IN THE SPFed SPECIMENS 4.2.2 THICKNESS DISTRIBUTION IN THE SPFed SPECIMENS 4.2.3 POST-FORMING MECHANICAL PROPERTIES 4.3 MICROSTRUCTURAL OBSERVATIONS 4.3.1 GAVITATION 4.3.2 GRAIN GROWTH CHAPTER 5. DISCUSSION 5.1 INFLUENCE OF FORMING CONDITIONS 5.2 EFFECT OF DIFFERENT DIE ENTRY RADII 5.3 STRAIN VARIATION IN THE FREE BULGED SPECIMENS 5.4 THICKNESS VARIATION IN THE FREE BULGED SPECIMENS 5.5 STRAIN VARIATION IN THE SPFed SPECIMENS 5.6 THICKNESS VARIATION IN THE SPFed SPECIMENS 5.7 EFFECT OF DIFFERENT LUBRICANTS ON THICKNESS DISTRIBUTION OF SPFed SPECIMENS 5.8 EFFECT OF DIFFERENT HEAT TREATMENT ON POST-FORMING MECHANICAL PROPERTIES CHAPTER 6. SUMMARY REFERENCES