Alloying effects on dislocation substructure evolution of aluminum alloys |
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| Institution: | 1. School of Mechanical and Materials Engineering, PO Box 642920, Washington State University, Pullman, WA 99164-2920, USA;2. Alcoa Technical Center, Alcoa Center, PA 15069-0001, USA;1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China;2. Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, University of Science and Technology Beijing, Beijing, 10083, China;3. ArGEnCo Department, MSM Team, University of Liège, Liège, 4000, Belgium;1. Structural Impact Laboratory (SIMLab), Centre for Research-based Innovation, Department of Structural Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway;2. SINTEF Materials & Chemistry, NO-7465 Trondheim, Norway;3. Norsk Hydro, Corporate Technology Office, NO-0283 Oslo, Norway;1. School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, PR China;2. State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, PR China;1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;2. Key Laboratory of Nonferrous Materials Science and Engineering of Ministry of Education, Central South University, Changsha 410083, China;1. Key Laboratory of Automobile Materials, Ministry of Education, and School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun, 130025, PR China;2. Department of Materials Science and Engineering, Norwegian University of Science and Technology, 7491, Trondheim, Norway |
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| Abstract: | The constitutive response of aluminum alloys is controlled by the evolution of dislocation substructure including mobile and forest dislocation density, cell size distribution and morphology, and misorientation angle between neighboring cells. The present study focuses upon the small strain regime and compares the measured microstructural evolution of 3003, 5005, and 6022 aluminum alloys during deformation. Room temperature tensile deformation experiments were performed on industrially manufactured specimens of each alloy and the evolving microstructure was compared with the mechanical response. The dislocation structure evolution was characterized using transmission electron microscopy and orientation imaging of deformed specimens. It was observed that structural evolution is a function of lattice orientation and the character of neighboring grains. In general, the dislocation cell size and misorientation angle between dislocation cells evolves systematically with deformation at relatively small strain levels. |
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