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纳米结构Al-0.3%Cu合金的力学稳定性和热稳定性研究

中文摘要第3-5页
ABSTRACT第5-7页
1 Introduction第11-14页
2 Literature review第14-46页
    2.1 Microstructural development of nanostructured metals第14-16页
    2.2 Deformation mechanisms in nanostructured metals第16-21页
        2.2.1 Slip of dislocation第18-19页
        2.2.2 Slip of partial dislocations and twinning第19-20页
        2.2.3 Grain boundary mediated mechanisms第20-21页
    2.3 Processing methods for nanostructured materials第21-27页
        2.3.1 Conventional cold rolling第22-26页
        2.3.2 Description of other SPD techniques第26-27页
    2.4 Mechanical Properties of nanostructured metals第27-29页
    2.5 Strengthening mechanisms第29-37页
        2.5.1 Grain size strengthening第30-35页
        2.5.2 Solid solution strengthening第35页
        2.5.3 Dislocation strengthening第35-37页
    2.6 Strategies to improve ductility第37-41页
        2.6.1 Strain hardening rate and strain rate sensitivity第38-39页
        2.6.2 Bimodal microstructure第39-40页
        2.6.3 Presence of nano precipitates第40页
        2.6.4 Solute effect on ductility第40-41页
    2.7 Effect of annealing on structure and mechanical properties of nanostructured metals第41-44页
    2.8 Objectives of the present project第44-46页
3 Experimental material and characterization techniques第46-54页
    3.1 Material design第46-48页
    3.2 Cold rolling第48页
    3.3 Annealing treatment第48-49页
    3.4 Mechanical testing第49-50页
        3.4.1 Tensile tests第49页
        3.4.2 Microhardness test第49-50页
    3.5 Microstructure and texture characterization第50-54页
        3.5.1 Optical microscopy第50页
        3.5.2 Scanning electron microscopy (SEM)第50-51页
        3.5.3 Transmission electron microscopy (TEM)第51-52页
        3.5.4 X ray diffraction (XRD)第52-54页
4 Structure and tensile behavior of nanostructured Al-0.3%Cu alloy第54-72页
    4.1 Structure第54-59页
        4.1.1 Morphology第54-57页
        4.1.2 Boundary spacing第57-58页
        4.1.3 Misorientation angle distribution第58页
        4.1.4 Dislocation density第58-59页
    4.2 Mechanical behavior第59-62页
        4.2.1 Stress-strain curve第59-60页
        4.2.2 Strain rate effects第60-62页
    4.3 Discussion第62-70页
        4.3.1 Effect of copper as solute on microstructural evolution第62-65页
        4.3.2 Tensile behavior第65-67页
        4.3.3 Strengthening mechanisms第67-70页
    4.4 Summary第70-72页
5 Effect of annealing on the microstructure and mechanical behaviorof nanostructured Al-0.3%Cu alloy第72-92页
    5.1 Microstructure第72-79页
        5.1.1 Microstructural evolution第72-74页
        5.1.2 Boundary spacing第74-77页
        5.1.3 Misorientation angle distribution第77-79页
        5.1.4 Dislocation density第79页
    5.2 Mechanical behavior第79-82页
        5.2.1 Microhardness第79-80页
        5.2.2 Tensile behavior第80-82页
    5.3 Discussion第82-90页
        5.3.1 Effect of copper as solute on microstructural evolution第82-84页
        5.3.2 Tensile stability第84-86页
        5.3.3 Strengthening mechanisms第86-90页
    5.4 Summary第90-92页
6 Textural evolution in nanostructured Al-0.3%Cu alloy第92-120页
    6.1 Warm forged texture第92-94页
    6.2 Deformation texture第94-97页
    6.3 Texture gradient第97-103页
    6.4 Textural evolution during annealing第103-111页
        6.4.1 Coarsening and recovery region第104-106页
        6.4.2 Partially recrystallized region第106-109页
        6.4.3 Recrystallized region and grain growth第109-111页
    6.5 Discussion第111-118页
        6.5.1 Deformation texture in Al-0.3%Cu alloy第111-113页
        6.5.2 Stability of Brass orientation第113-114页
        6.5.3 Development of Goss orientation第114-118页
    6.6 Summary第118-120页
7 Conclusions and outlooks第120-124页
Acknowledgements第124-126页
References第126-138页
Publications and presentations第138-139页
    Publications第138页
    Presentations at international conferences第138-139页
    Educational background第139页

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